Luminous Landscape Forum

Raw & Post Processing, Printing => Colour Management => Topic started by: Iliah on October 28, 2014, 07:26:27 pm

Title: Colour and light measurements using portable Android platform
Post by: Iliah on October 28, 2014, 07:26:27 pm
Now you can connect your spectrometer or colorimeter to an Android portable to obtain measurements, including:

incident illuminance
reflected luminance
flash measurement
Exposure Value (EV) (includes Interactive Exposure Calculator)
Color Temperature, Delta Color Temperature, Black Body or Daylight, Correlated or dE2000, Kelvin or Mired
Color Rendering Index (CIE 1995)
More details here: http://www.argyllcms.com/pro/

For supported hardware, http://www.argyllcms.com/pro/cmdoc/requirements.html
Title: Re: Colour and light measurements using portable Android platform
Post by: Damon Lynch on October 29, 2014, 04:56:39 am
There is a write-up on it here: http://libregraphicsworld.org/blog/entry/introducing-argyllpro-colormeter-for-android
Title: Re: Colour and light measurements using portable Android platform
Post by: Some Guy on October 29, 2014, 12:48:54 pm
I have a 10.1" Samsung Table 3 and an i1 Display Pro and just tried the demo.  It does a lot!  Much more than most any spectrometer software that comes with the hardware.

However, the demo is just a means to see if your gear will play nice with each other and the demo measurements may be canned or close approximations.  If you want the full tomato and real readings, its $99. (My outside daylight Kelvin was around 4,951.5K on the demo, and it's really about 5,450K.).

I don't know if it will work with flash though.  I've written to the maker so we'll see as it would be a lot cheaper than a Sekonic color temperature meter (By half!  Even with a tablet, spectrometer head, and software.).

SG
Title: Re: Colour and light measurements using portable Android platform
Post by: GWGill on October 29, 2014, 07:49:52 pm
I don't know if it will work with flash though.  I've written to the maker so we'll see as it would be a lot cheaper than a Sekonic color temperature meter (By half!  Even with a tablet, spectrometer head, and software.).
You can measure flash color temperature and exposure value using an i1pro, i1pro2 or ColorMunki spectro, either incident (using the Ambient mode) or reflected (using Emission mode).

I will look at adding flash support to one of the colorimeters in a later release, although I'm not sure yet if it's technically possible.
Title: Re: Colour and light measurements using portable Android platform
Post by: Some Guy on October 29, 2014, 10:59:49 pm
You can measure flash color temperature and exposure value using an i1pro, i1pro2 or ColorMunki spectro, either incident (using the Ambient mode) or reflected (using Emission mode).

I will look at adding flash support to one of the colorimeters in a later release, although I'm not sure yet if it's technically possible.

Okay.  Would be nice if it does work with electronic flash.  I know with the Sekonic C-500 it sometimes needs a remote trigger in conjunction with the flash to sync it all up.  Ambient and the brief flash seems to trick it.  I shoot sometimes with PF-330 flashbulbs and they burn longer and it get confused with those too unless I shoot in total darkness to get a reading.  Those have a ramp up and ramp down and the color may change in that 2 second burn time.  Has to be some timing issue with flash and ambient - maybe.

I did note one thing in the ArgyllPRO write up.  The ColorMunki Photo will most likely not work with most Android devices as it pulls a lot more juice than most tablets and phones supply.  It will not even light the ColorMunki Photo LEDs up at all (I got one.).  x-rite said at first it would, then they backed off with their ColorTUNE software working with the ColorMunki Photo and I had to go buy the i1 Display Pro for it to work on the tablet.  Won't work with a x-rite i1 Photo Pro 2 head either (Got that too.), but that is a whole lot of power consumption too than the ColorMunki.  It has to be a very low-power consumption device for the spectrometer on most battery-powered Android devices.

Also, for some reason I do not fully know about, Sekonic put two red channel reading devices in their C-500/R color temp. meter: One for digital, and second for film.  Something about different readings for Kelvin or something for the two formats.

SG
Title: Re: Colour and light measurements using portable Android platform
Post by: GWGill on October 29, 2014, 11:32:30 pm
Would be nice if it does work with electronic flash.  I know with the Sekonic C-500 it sometimes needs a remote trigger in conjunction with the flash to sync it all up.
Flash measurement isn't as convenient as I'd like it to be - you have to hold the instrument button down and trigger the flash, but it certainly works, as long as there is the ambient is constant, and there is sufficient difference between it and the flash.
Quote
I shoot sometimes with PF-330 flashbulbs and they burn longer and it get confused with those too unless I shoot in total darkness to get a reading.  Those have a ramp up and ramp down and the color may change in that 2 second burn time.  Has to be some timing issue with flash and ambient - maybe.
I don't know is something that takes 2 seconds will work or not. Most electronic flashes are extremely short.
Quote
I did note one thing in the ArgyllPRO write up.  The ColorMunki Photo will most likely not work with most Android devices as it pulls a lot more juice than most tablets and phones supply. 
That's not been the experience so far, but it is early days. Low powered USB2 devices are allowed to draw 100mA, and most of the Colorimeters fall into this group. The spectrometers capable of reflective measurement fall into the USB2 high power category, and are allowed to draw up to 500mA, which they only do when the illumination source is on. If a device isn't prepared to supply 500mA, it is meant to reject it completely, not half work. Certainly none of the tablets or largish phones I tried it on, reject the ColorMunki Spectro. But there may well be some that have OTG and won't work with it - that's why ColorMeterDemo exists. I know for sure that the Nexus 7 has no problems.
Title: Re: Colour and light measurements using portable Android platform
Post by: Klami85 on November 09, 2014, 10:14:57 am
Hi, I have tested demo version of ArgyllPRO with colormunki design and Efi es1000. Both instrument were recognized by the software on LG G3 and G2. Can I be sure that both instruments will work propertly with full version of argyllpro?
Title: Re: Colour and light measurements using portable Android platform
Post by: GWGill on November 11, 2014, 12:06:08 am
Hi, I have tested demo version of ArgyllPRO with colormunki design and Efi es1000. Both instrument were recognized by the software on LG G3 and G2. Can I be sure that both instruments will work propertly with full version of argyllpro?
Yes, you can be sure - the instrument driver code is identical. You can also return your purchase from Google within 2 hours, no questions asked.
Title: Re: Colour and light measurements using portable Android platform
Post by: Rhossydd on November 11, 2014, 04:20:02 am
If you want the full tomato and real readings, its $99.
OUCH, I think that makes it the most expensive Android app I've seen.
Title: Re: Colour and light measurements using portable Android platform
Post by: Czornyj on November 11, 2014, 12:03:26 pm
OUCH, I think that makes it the most expensive Android app I've seen.

It's a bargain. Similar apps like Spectrashop or CT&A start from 95$, TV calibration apps that support reference grade sensors like K-10 or JETI Specbos 1211 can cost few thousand $. And (AFAIK) none of them are available on Android/iOS platform.
Title: Re: Colour and light measurements using portable Android platform
Post by: GWGill on November 11, 2014, 08:32:04 pm
OUCH, I think that makes it the most expensive Android app I've seen.
You should get out more - there are a number of specialised apps with limited market size (plus the inevitable scam apps) that cost as much or more:

http://theultralinx.com/2014/09/most-expensive-apps.html
http://www.cultofmac.com/241218/the-999-99-club-these-are-the-most-expensive-apps-on-the-app-store/
Title: Re: Colour and light measurements using portable Android platform
Post by: Rhossydd on November 12, 2014, 02:59:06 am
You should get out more
I don't go out looking to see how I can waste money, but I've never come across anything so expensive before. Even Adobe's version of Photoshop on Android is only £7 ($10?).
Quote
there are a number of specialised apps with limited market size (plus the inevitable scam apps) that cost as much or more:
Well if http://www.androidauthority.com/most-expensive-android-apps-and-games-564948/ this site is to be believed, and it's just first I found in Google, that puts your app at joint 9th most expensive Android app.
Quote
http://theultralinx.com/2014/09/most-expensive-apps.html
http://www.cultofmac.com/241218/the-999-99-club-these-are-the-most-expensive-apps-on-the-app-store/
No surprise that iTunes offers some stupidly priced apps.

I know from experience that OTG can be a flaky technology and isn't worth investing much money into. If I have to carry a spectro around, a netbook is hardly much more to carry and I can use all the software I already have a licence for, plus the useful free software like i1Share, Colorport etc.
Sell it at a more normal premium app price, say $20, and I might buy it. At $100 it's far too much.
Title: Re: Colour and light measurements using portable Android platform
Post by: GWGill on November 12, 2014, 06:13:54 am
I don't go out looking to see how I can waste money, but I've never come across anything so expensive before. Even Adobe's version of Photoshop on Android is only £7 ($10?).
And they expect to sell 100000's of  copies. Rather a different proposition.
Quote
I know from experience that OTG can be a flaky technology and isn't worth investing much money into.
If it works on your device, it isn't going to suddenly stop working, and the level of hardware support is increasing. Even some of the very cheap tablets now support it.
Quote
If I have to carry a spectro around, a netbook is hardly much more to carry and I can use all the software I already have a licence for, plus the useful free software like i1Share, Colorport etc.
Sell it at a more normal premium app price, say $20, and I might buy it. At $100 it's far too much.
No-one is twisting your arm - if it doesn't work for you, don't buy it. But notice most of the those "free" programs are supplied by the instrument manufacturers who have taken your money - and a good deal more than $100. How much does a ColorMunki spectro or i1pro2 cost ?

But the way some people carry on about $100 is amazing - it's dinner for two at a restaurant, filling your tank, or an hour of a professionals time. And how much did you pay for a camera, lens or flash unit ? Have you ever priced a dedicate photo color meter ?
Title: Re: Colour and light measurements using portable Android platform
Post by: Rhossydd on November 12, 2014, 07:31:41 am
If it works on your device, it isn't going to suddenly stop working,
I'm glad you have that confidence. Rather a lot of my phone's functionality seems to change with OS upgrades.
Quote
But notice most of the those "free" programs are supplied by the instrument manufacturers who have taken your money - and a good deal more than $100.
Yes, but they come with the kit I need to use the app anyway.
Quote
But the way some people carry on about $100 is amazing
Really ? have you not spotted that most phone/tablet apps are cheap and very rarely more than $20 ?
Title: Re: Colour and light measurements using portable Android platform
Post by: GWGill on November 12, 2014, 07:47:33 am
have you not spotted that most phone/tablet apps are cheap and very rarely more than $20 ?
I know of no mainstream phone or tablet for $20 - not unless you're completely blind to the fact that you are signing up to pay it's real cost by instalments - and in any case, they are sold in millions of units.
Title: Re: Colour and light measurements using portable Android platform
Post by: Rhossydd on November 12, 2014, 08:00:34 am
I know of no mainstream phone or tablet for $20 - not unless you're completely blind to the fact that you are signing up to pay it's real cost by instalments - and in any case, they are sold in millions of units.
Try reading my comments before you reply to them. I'll add some emphasis>
"have you not spotted that most phone/tablet apps are cheap and very rarely more than $20 ?"
Title: Re: Colour and light measurements using portable Android platform
Post by: GWGill on November 12, 2014, 01:48:42 pm
And you in turn seem to have failed to spot that ArgyllPRO ColorMeter is not a video game, trying to suck you in with in-app purchasing, nor some other trivial, throw away gimmick app. blatting advertising at you, but instead is a technical and scientific tool intended for those with serious use, and priced accordingly.
Title: ArgyllPRO ColorMeter V1.1 Released
Post by: GWGill on March 22, 2015, 09:48:11 pm
I'm pleased to announce the release of ArgyllPRO ColorMeter Version 1.1.

http://www.argyllpro.com.au (http://www.argyllpro.com.au)

This version features greatly improved accessibility with the introduction of
application area Presets, and an accompanying demonstration Video:

http://youtu.be/ODfCoUH0euQ (http://youtu.be/ODfCoUH0euQ)

There is better Android V5 (Lollipop) compatibility and numerous other
bug fixes and improvements.
Title: Re: Colour and light measurements using portable Android platform
Post by: kirkt on March 23, 2015, 03:38:30 pm
Terrific utility, very nicely done.  Congratulations - I do not own an Android device, but I think I may start looking around for an inexpensive one from the list.  1001 uses for this application no doubt.

kirk
Title: Re: Colour and light measurements using portable Android platform
Post by: andy.k on March 27, 2015, 07:01:21 pm
hi Graeme,

I'm a big fan and very appreciative of all your extremely good work and help you offer. I haven't quite mastered the Argyll suite yet, but shall in time.
Just a very innocent question: if in time Ubuntu Touch makes it to commercial tablets will you also offer it commercially for that system? I'm an Ubuntu user and a bit of an enthusiast, but when I can afford it I shall definitely be purchasing a tablet exclusively to use with your wonderful program.

thanks, all the best.
Title: Re: Colour and light measurements using portable Android platform
Post by: GWGill on March 28, 2015, 02:56:47 am
>  if in time Ubuntu Touch makes it to commercial tablets will you also offer it commercially for that system?

I'm certainly keeping an eye on other handheld platforms, but it comes down to two things :- does the platform have native code USB host support, and is it popular enough that more than a handful of people are going to be interested in buying it ?
If not, then I'm probably better off spending time improving ArgyllCMS instead.

(But then I'm not convinced that more than one platform is needed - Android is cheap and widely available - if you want to measure color on the go, you can solve your problem right now, with no further work on anyone's part.)
Title: Re: Colour and light measurements using portable Android platform
Post by: Alexey.Danilchenko on May 16, 2015, 12:16:29 pm
Graeme

Is that possible in ArgyllPRO ColorMeter to save the results (including spectral ones when available) of the measurements? In spotread a log file can be produced or measurements saved to spectral files - so I wonder if that is possible (have not found it in the docs or trial version). I'd like to use my Android device as portable recorder for these measurements (spectral data mainly) to be able to process later.

Title: Re: Colour and light measurements using portable Android platform
Post by: Alan Klein on May 16, 2015, 01:52:17 pm
Doesn't this all come down to how accurate the sensor is?  You can have the best software.  But you can't make a silk purse from a sow's ear.
Title: Re: Colour and light measurements using portable Android platform
Post by: GWGill on May 17, 2015, 09:19:19 pm
Is that possible in ArgyllPRO ColorMeter to save the results (including spectral ones when available) of the measurements?
Not with the current version.

I'm planning to add a simple way of saving the raw XYZ and spectral measurements to a CGATS (or possibly CxF ?) file in the next version (probably a couple of weeks?), as part of supporting another instrument (The Image Engineering EX1, from the company that sells the fancy camera calibration gear), but anything more sophisticated will come a bit latter.
Title: Re: Colour and light measurements using portable Android platform
Post by: GWGill on May 17, 2015, 09:21:19 pm
Doesn't this all come down to how accurate the sensor is?  You can have the best software.  But you can't make a silk purse from a sow's ear.
Absolutely. So if you are after high accuracy, spend money on a high end instrument (i1pro2 ? Klein K10 ? JETI 1211 ?).
Title: Re: Colour and light measurements using portable Android platform
Post by: Alexey.Danilchenko on May 18, 2015, 04:06:08 am
Not with the current version.

I'm planning to add a simple way of saving the raw XYZ and spectral measurements to a CGATS (or possibly CxF ?) file in the next version (probably a couple of weeks?), as part of supporting another instrument (The Image Engineering EX1, from the company that sells the fancy camera calibration gear), but anything more sophisticated will come a bit latter.


Great - thanks. The simple version will do great for my needs (more sophisticated is of course very welcome ;).
Title: Re: Colour and light measurements using portable Android platform
Post by: torger on May 18, 2015, 04:39:35 am
I'm also interested in the feature saving a complete spectrum file, so I hope it appears in a future release. I need it to measure real light outdoors to make spectral simulations for camera profiling using SSFs, this way I can test a profile's performance in various real light conditions.

It would be great if the spectrum file could get GPS coordinates if the Android device has GPS, and timestamp of course so it will be easier to sort out which is which when you have saved lots of spectra.
Title: Re: Colour and light measurements using portable Android platform
Post by: GWGill on May 18, 2015, 07:49:22 am
I'm also interested in the feature saving a complete spectrum file, so I hope it appears in a future release. I need it to measure real light outdoors to make spectral simulations for camera profiling using SSFs, this way I can test a profile's performance in various real light conditions.
Exact what Image Engineering think their customers may want to do, as well as then reproducing it on their programmable spectral source :-)
Quote
It would be great if the spectrum file could get GPS coordinates if the Android device has GPS, and timestamp of course so it will be easier to sort out which is which when you have saved lots of spectra.
Right - good point. (Down the track I was thinking that tagging with a photo would be nice too.)
Title: Re: Colour and light measurements using portable Android platform
Post by: Alexey.Danilchenko on May 19, 2015, 02:47:12 pm
Exact what Image Engineering think their customers may want to do, as well as then reproducing it on their programmable spectral source :-)

Great - just bought the app and will wait eagerly for the saving spectrum feature.
Title: Re: Colour and light measurements using portable Android platform
Post by: Alexey.Danilchenko on August 23, 2015, 09:43:25 am
Graeme

Any chance a version with saving spectral measurements will be on horizon? Just checking - as v1.2 came and I have not found it there. Thanks
Title: Re: Colour and light measurements using portable Android platform
Post by: WayneLarmon on August 23, 2015, 06:44:37 pm
I'm planning to add a simple way of saving the raw XYZ and spectral measurements to a CGATS (or possibly CxF ?) file in the next version...

I'd vote for CGATS.  CGATS is a lot more straightforward to process with Perl regular expressions than CxF is.

And please also include the calculated data (CRI, CCT, etc.), in addition to the spectral data.

Wayne
Title: Re: Colour and light measurements using portable Android platform
Post by: Lundberg02 on August 23, 2015, 10:51:00 pm
There is a write-up on it here: http://libregraphicsworld.org/blog/entry/introducing-argyllpro-colormeter-for-android


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at link will not load
Title: Re: Colour and light measurements using portable Android platform
Post by: GWGill on August 23, 2015, 10:59:11 pm
Any chance a version with saving spectral measurements will be on horizon? Just checking - as v1.2 came and I have not found it there.
That's something I'm working on for the next major release.
Title: Re: Colour and light measurements using portable Android platform
Post by: Lundberg02 on August 24, 2015, 12:33:12 am
I don't go out looking to see how I can waste money, but I've never come across anything so expensive before. Even Adobe's version of Photoshop on Android is only £7 ($10?).Well if http://www.androidauthority.com/most-expensive-android-apps-and-games-564948/ this site is to be believed, and it's just first I found in Google, that puts your app at joint 9th most expensive Android app.No surprise that iTunes offers some stupidly priced apps.

I know from experience that OTG can be a flaky technology and isn't worth investing much money into. If I have to carry a spectro around, a netbook is hardly much more to carry and I can use all the software I already have a licence for, plus the useful free software like i1Share, Colorport etc.
Sell it at a more normal premium app price, say $20, and I might buy it. At $100 it's far too much.

ColorPort is deprecated and replaced with iPublish.
Title: Re: Colour and light measurements using portable Android platform
Post by: Alexey.Danilchenko on August 24, 2015, 03:12:44 am
That's something I'm working on for the next major release.
Any timeframe when it will be available?
Title: Re: Colour and light measurements using portable Android platform
Post by: WayneLarmon on August 24, 2015, 06:21:28 am

th
at link will not load

It worked when the post was posted. I read that blog entry.  (It described ColorMeter's features.)   Right now, http://libregraphicsworld.org/ doesn't exist.  Maybe they are having server problems.  Or maybe the site was taken down.

Wayne
Title: Re: Colour and light measurements using portable Android platform
Post by: GWGill on August 24, 2015, 06:46:40 am
Any timeframe when it will be available?
I'll be disappointed if it's not finished by the end of the year.
Title: Re: Colour and light measurements using portable Android platform
Post by: Alexey.Danilchenko on August 24, 2015, 07:33:35 am
I'll be disappointed if it's not finished by the end of the year.

Great thanks (the sooner the better though ;))
Title: Re: Colour and light measurements using portable Android platform
Post by: Lundberg02 on August 24, 2015, 06:50:12 pm
It worked when the post was posted. I read that blog entry.  (It described ColorMeter's features.)   Right now, http://libregraphicsworld.org/ doesn't exist.  Maybe they are having server problems.  Or maybe the site was taken down.

Wayne

The site works now, must have had a server issue. The site is very rich and I could read it all day, but I have looked in tuts the ColorMeter is not there, and when i click on blog, my email app opens, so I have no idea what that problem is. I'll try using your original link now. Ok, it works and I have the ColorMeter article. I tried my i1 on the demo and it hooks up on my Android tablet. Now I need to read the article, read my i1 manual, and download the app, I guess. Use the diffuser or not when measuring lamps?
Title: Re: Colour and light measurements using portable Android platform
Post by: Lundberg02 on August 30, 2015, 02:35:11 am
I hope this is answered in the Help for ColorMeter:  how do you position the sensor when measuring lamps and do you use the ambient diffuser? I'm about to buy ColorMeter just to satisfy curiosity about my desk lamp and my Phillips LED bulbs.
Title: Re: Colour and light measurements using portable Android platform
Post by: GWGill on August 30, 2015, 10:05:33 pm
I hope this is answered in the Help for ColorMeter:  how do you position the sensor when measuring lamps and do you use the ambient diffuser? I'm about to buy ColorMeter just to satisfy curiosity about my desk lamp and my Phillips LED bulbs.
Sorry, no - I'm not sure what sort of advice would be appropriate, since there are so many possible situations, and it's reasonably common sense stuff. (I'm open to suggestions though.)

If you are just trying to measure color temperature and CRI, it's not that hard - make sure the lamp illuminates the instrument, and that there is not too much stray light from other sources contaminating the result. Ambient/illuminance mode is appropriate. If in doubt, take a few different readings from different locations, and see which seem most representative.
Title: Re: Colour and light measurements using portable Android platform
Post by: Lundberg02 on August 31, 2015, 02:15:33 am
It's not common sense for someone who has never done it before, so.....
Anyway, I'll do it with and without, hang it on the lamp, position it under the lamp, with and without other lights on in the room; and any other variables I can think of. I have a black photo cloth I can drape over the setup.
Title: Re: Colour and light measurements using portable Android platform
Post by: srialto on September 29, 2015, 08:41:26 pm
"a commercial app for the Android platform where there is virtually no competition"
This is great! I don't disparage Apple but I love it when things come out on platforms I use.
Title: Re: Colour and light measurements using portable Android platform
Post by: Jack Hogan on May 28, 2018, 10:15:20 am
Graeme

Any chance a version with saving spectral measurements will be on horizon? Just checking - as v1.2 came and I have not found it there. Thanks

Hi Graeme,

How is the version of ArgyllPro ColorMeter that saves/transfers spectral measurements coming along?  It's one of the main reasons why I bought your app and it shouldn't be that hard to do since you already have that functionality in ArgyllCMS.

Jack
Title: Re: Colour and light measurements using portable Android platform
Post by: GWGill on May 28, 2018, 08:40:38 pm
How is the version of ArgyllPro ColorMeter that saves/transfers spectral measurements coming along?  It's one of the main reasons why I bought your app and it shouldn't be that hard to do since you already have that functionality in ArgyllCMS.
Hello Jack, it is something I've been working on, amongst other pressing tasks (life spirals a bit out of control at times). Unfortunately a lot of the work will be invisible, such as getting the application working with the latest Android API level (a new Google mandate), as well as testing on a more modern tablet running Android 7.1 rather than depending on an emulator that can't talk to a real instrument. So I'm planning on enabling the logging support, as well as adding the much requested IES TM-30-15 color rendering index in the next release. Reports will be some release after that though.
Title: Re: Colour and light measurements using portable Android platform
Post by: Jack Hogan on May 29, 2018, 02:45:22 am
Hello Jack, it is something I've been working on, amongst other pressing tasks (life spirals a bit out of control at times). Unfortunately a lot of the work will be invisible, such as getting the application working with the latest Android API level (a new Google mandate), as well as testing on a more modern tablet running Android 7.1 rather than depending on an emulator that can't talk to a real instrument. So I'm planning on enabling the logging support, as well as adding the much requested IES TM-30-15 color rendering index in the next release. Reports will be some release after that though.

Thanks Graeme.  They've been three years in the making, what's so time consuming about it?  You already have the functionality and file structure in ArgyllCMS and we don't need anything fancy: just stick with KISS at first and put the log files on a Drive or as an attachment to email (you can use the 'Share' infrastructure).  That's all most folks need, the rest is just a cherry on top.

Jack
Title: Re: Colour and light measurements using portable Android platform
Post by: WayneLarmon on May 29, 2018, 09:49:53 pm
Unfortunately a lot of the work will be invisible, such as getting the application working with the latest Android API level (a new Google mandate), as well as testing on a more modern tablet running Android 7.1 rather than depending on an emulator that can't talk to a real instrument. So I'm planning on enabling the logging support, as well as adding the much requested IES TM-30-15 color rendering index in the next release. Reports will be some release after that though.

I just tested ColorMeter on my Google Pixel 2 that runs Android 8.1.0 and it runs fine.  I'm also eagerly awaiting logging.  Screen shots only go so far.

And IES TM-30-15 support.  I recently bought some hardware store LED bulbs (that cost less than $10 (USD) ea.) that tested CRI > 90 and TLCI > 96, with a high R9 value.  But I'm a bit suspicious of their true color rendering ability.
Title: Re: Colour and light measurements using portable Android platform
Post by: WayneLarmon on May 30, 2018, 07:43:04 am
Thanks Graeme.  They've been three years in the making, what's so time consuming about it?  You already have the functionality and file structure in ArgyllCMS and we don't need anything fancy: just stick with KISS at first and put the log files on a Drive or as an attachment to email (you can use the 'Share' infrastructure).  That's all most folks need, the rest is just a cherry on top.

What do "most folks need"?  For me, I want to be able to measure once and analyze later.  As an example, I've used Argyll's iccgamut and viewgam to generate 3D plots of .icc and .icm profiles.  I have a Perl script that uses iccgamut and viewgam  generate plots like this (http://www.frogymandias.org/gamuts/gamuts-2018-xd3-html/xd3-2018/USSheetfedCoated_sRGB_wrl.x3d.html) (to show why sRGB isn't a good color space for preparing images for offset printing.)  Scroll down to see the metadata.

My script generates as many plots as I define in config files (http://www.frogymandias.org/gamuts/gamuts-2018-xd3-html/allgamuts.html).  (Also scroll down to see data on the complete collection.)

I'd like to do the same thing with spectral measurements.  Measure an illuminant once and then generate as many web pages containing plots and data as I define in config files.  Depending on what I want to showcase. 

When I use ColorMeter now, all I can do now is make a collection of screen shots.  If I had measured an illuminant years ago and no longer have the illuminant now I am out of luck if I want to do a different analysis.

These are my wants.  I imagine that others have different wants.  I suspect this may be why it may take some time to add saving data to ColorMeter.  (And may imply a different "ColorMeter Pro" suite of programs.  Or "ColorMeter Hobbyist", in my case.)
Title: Re: Colour and light measurements using portable Android platform
Post by: Jack Hogan on May 30, 2018, 10:11:03 am
What do "most folks need"?  For me, I want to be able to measure once and analyze later.  As an example, I've used Argyll's iccgamut and viewgam to generate 3D plots of .icc and .icm profiles.  I have a Perl script that uses iccgamut and viewgam  generate plots like this (http://www.frogymandias.org/gamuts/gamuts-2018-xd3-html/xd3-2018/USSheetfedCoated_sRGB_wrl.x3d.html) (to show why sRGB isn't a good color space for preparing images for offset printing.)  Scroll down to see the metadata.

My script generates as many plots as I define in config files (http://www.frogymandias.org/gamuts/gamuts-2018-xd3-html/allgamuts.html).  (Also scroll down to see data on the complete collection.)

I'd like to do the same thing with spectral measurements.  Measure an illuminant once and then generate as many web pages containing plots and data as I define in config files.  Depending on what I want to showcase. 

When I use ColorMeter now, all I can do now is make a collection of screen shots.  If I had measured an illuminant years ago and no longer have the illuminant now I am out of luck if I want to do a different analysis.

These are my wants.  I imagine that others have different wants.  I suspect this may be why it may take some time to add saving data to ColorMeter.  (And may imply a different "ColorMeter Pro" suite of programs.  Or "ColorMeter Hobbyist", in my case.)

Nice plots Wayne! 

The main value I see in Color Meter as a light savvy photographer is not having to cart around my laptop whenever I want to capture spectral data at the scene or at my home.  If I have to hustle with a laptop then I might as well use free ArgyllCMS.

Data export is a function that would be assumed to be included by anyone buying the app.  Imagine if cameras only allowed you to see your shots on the camera's screen but not export it.  But ArgyllPro's marketing material and documentation does not state that you cannot export that data.  I was surprised when I bought it and I couldn't find an easy way to access it.  I went to the online manual and looked for the 'export' or 'log' or 'file' menu but nada, I couldn't believe it.   I did not return the product for a refund only because I think Graeme is a champ and deserves my support anyways - and I trusted him when he said that the 'feature' was coming almost Real Soon Now (three years ago).

As for what customers want I think it's pretty simple, especially if you KISS (at least at first): we want access to the data that was collected (read through this thread for the opinion of other identically-minded souls), just like in ArgyllCMS.  It's not rocket science, there are standard file types and ArgyllCMS already uses them so there is no need to reinvent the wheel.  It should also be relatively easy to do, because Android has built-in infrastructure to easily share text data (e.g. 'Share').  So I think it's just a matter of gently prodding Graeme to do the professional thing and deliver on what he promised he was going to do three years ago.

Now would be good :) 

Jack

Title: Re: Colour and light measurements using portable Android platform
Post by: WayneLarmon on May 30, 2018, 11:11:26 am
Nice plots Wayne!

I was inspired by the plots that are on Dry Creek Photo (https://www.drycreekphoto.com/tools/printer_gamuts/).  My plots were for my own curiosity and need some more work for public consumption.  But I'm sure you get the drift.

I think anybody providing 3D gamut plots uses the same ArgyllCMS programs that I did to do all the heavy lifting of generating the actual 3D plots.  For which we all owe a debt to Graeme.

Quote
The main value I see in Color Meter as a light savvy photographer is not having to cart around my laptop whenever I want to capture spectral data at the scene or at my home.  If I have to hustle with a laptop then I might as well use free ArgyllCMS.

Data export is a function that would be assumed to be included by anyone buying the app.

What would a typical photographer do with data?  I know enough programming to wrap scripts around the programs that do the complicated parts but I'm pretty sure that most photographers don't have a copy of Programming Perl (https://www.amazon.com/Programming-Perl-Unmatched-processing-scripting/dp/0596004923) next to their computer.

"Light savvy" photographers should be using ColorMeter.  I've been trying to make this point on, um, another photography forum that you are familiar with, for years.  To no avail.  The professional photographers deal directly with lighting dealers and everybody else shares folk wisdom.

I'd like to get past the first part of getting more light savvy photographers using ColorMeter.   However, if ColorMeter was used by more photographers and if it did export data, that it would be really good to pool spectral test results of various lights. 

Title: Re: Colour and light measurements using portable Android platform
Post by: Alexey.Danilchenko on May 31, 2018, 06:48:03 am
Thanks Graeme.  They've been three years in the making, what's so time consuming about it?  You already have the functionality and file structure in ArgyllCMS and we don't need anything fancy: just stick with KISS at first and put the log files on a Drive or as an attachment to email (you can use the 'Share' infrastructure).  That's all most folks need, the rest is just a cherry on top.

Have been waiting for this as well - same as for Jack, I got it mostly for that reason to have a portable app to log the captured spectrum on the go and analyze later.