LR4 beta white balance on cropped images

[mcbroomf]

I'm not sure if this has been discussed, I could not find a post with silimar issues.

LR4 Beta 64 on WinVista : Nex 5N raw files

WB picker on a cropped image seems to give variable (and wrong) results

I wanted to tweak WB an image that I'd previously cropped and made some adjustments to....WB was already close, the picker on a white fishing bouy was at ~90/88/91.  Clicking the picker on bouy gave a strong red shift, about +5 on the red.
1st time I did it I thought I'd jerked the mouse somewhere, tried it again.. and again with similar results.  Repeated several time.
I opened LR3 and had no problems with the same image.
I reopened LR4B and got the same problem again.
Undid the crop and the WB adjustment was fine.
I went back to LR3 and cropepd the same image the same way and WB was fine.
Went back to Lr4B and again, WB was off.
I reset the image so that it had no other adjustments.  WB was OK but again when I cropped it it was off.
Opened another image and did the same thing.  ie full image WB was OK, cropped I got a +5 or so shift, although this time in blue.
Tried it with a different crop and got a -15 on red.

[Nigel Johnson]

Mike,

I don't know if this is the cause of the problem but LR4 Beta has a white balance sample area that is now zoom-level dependent rather than the fixed size used in earlier versions, I do not know whether the sample area also changes for a cropped image.

Regards
Nigel

[Richowens]

Mike,

Please post a bug report..http://forums.adobe.com/community/labs/lightroom4?view=discussions

Rich

[mcbroomf]

Thanks Nigel, I didn't know about the zoom, it was max though (ie I wasn't zoomed out to include a larger area).  The crop was relatively modest, 2:1 full width.

Rich... Done

[mcbroomf]

I think I mistook your meaning for mag of the picker Nigel.  I assume now that you meant the zoom of the image itself.

When comparing the WB adjustment results of LR3 and LR4B both images were at FIT, and as the image stayed at full width there was no zoom change, just a crop top and bottom.

[madmanchan]

Click-WB in Lr doesn't depend on the crop.  As stated earlier, in Lr 4 Beta, click-WB does depend on the zoom factor and the Scale setting in the toolbar.  In short, when you use the click-WB tool, there is a magnified view of pixels next to the cursor.  All of the pixels (and ONLY those pixels) shown in that magnified view will be used to compute the resulting WB. 

[Nigel Johnson]

Eric

Thank you for confirming how the click-WB works. I had wondered if the crop that Mike was using resulted in him viewing the image at a different magnification, his clarification on the crop details shows that this was not the case.

Regards
Nigel

[mcbroomf]

Yes, due to the crop (a little off the top and bottom) I was not zooming.  The picker was at the highest mag scale (5x5) in all cases and in fact the area I was using the WB was large enough that there was no real difference across the 5x5.

I saw that Rich Owens confirmed the same problem on the Adobe forum, and I also checked using 1ds3 files and had the problem.

[mcbroomf]

Eric is on it in case others have the same issue
http://forums.adobe.com/message/4180250#4180250