I have just uploaded Histogrammar v1.2. It has 2 new features I find interesting:
1. A gamma slider so by setting the appropiate gamma of the image under analysis, now the logarithmic histograms (i.e. histograms representing EV) are correct even with non-linear images as before. So you can develop your image neutrally (all settings to 0) in ACR/LR or any other RAW developer, and the log mode, EV division and zones will show the dynamic range of the scene in the correct f-stops.
NOTE that the user must set the appropiate gamma (2.2 in Adobe RGB, 1.8 in ProPhoto RGB), the programs doesn't do that automatically.
gamma was set at 2.2 (default) in this Adobe RGB image, so now the log histograms and EV divisions are correct.
2. It has a new 'RAW' mode which allows to plot 100% RAW histograms (useful to calculate saturation points, black points, find fake ISOs,...). To do that you just need to extract the RAW data with DCRAW:dcraw -D -T -4 -t 0 file.cr2
provides pure RAW data, with the same values as it was codified. Useful to study unprocessed RAW values.dcraw -d -r 1 1 1 1 -T -4 -t 0 file.cr2
provides undemosaiced data but corrected by the black and saturation points and scaled to 16-bit. Useful to look at the log histograms.
For those who have already installed Histogrammar v1.1 don't uninstall it, just download the v1.2 update (60 KB) and replace the .exe file as indicated in the .txt file
For those who don't have Histogrammar installed, download and install first Histogrammar v1.1, and the proceed to update the .exe file.
Download both files from HERE
Any feedback is appreciated.