Hisograms getting corupted

[Eric]

Kirk,

I've just noticed that if I apply a color class to an image in preview when I go back to that image the histogram has changed from the smooth ups and downs to a very spiked histogram. The images are fine, it's just the histogram that gets goofed up. If I send the image to CS2 the historgram there looks fine. Again nothing is being done to the image so I not worried about it but thought that you might like to know.

Eric

[Kirk Baker]

I've just noticed that if I apply a color class to an image in preview when I go back to that image the histogram has changed from the smooth ups and downs to a very spiked histogram. The images are fine, it's just the histogram that gets goofed up. If I send the image to CS2 the historgram there looks fine. Again nothing is being done to the image so I not worried about it but thought that you might like to know.

OS platform, and file type would be useful.

Thanks,

-Kirk

[Eric]

Sorry about that. I'm on XP pro and it's doing it to jpegs.

Eric

[Kirk Baker]

Sorry about that. I'm on XP pro and it's doing it to jpegs.

Should be fixed in the 4.4.3.1 update.

-Kirk

[Eric]

Nope. Still getting corupted, Happens when I add a color class to an image and move to the next. When I go back all of the histograms are spiking. Using XP Pro, 3GB ram, 2 TB of drives latest XP patches/upgrades.

[Kirk Baker]

Nope. Still getting corupted, Happens when I add a color class to an image and move to the next. When I go back all of the histograms are spiking. Using XP Pro, 3GB ram, 2 TB of drives latest XP patches/upgrades.

Could you post a screen shot of the histogram before and after?

Thanks,

-Kirk

[NickML]

I've just noticed that if I apply a color class to an image in preview when I go back to that image the histogram has changed from the smooth ups and downs to a very spiked histogram.

Are you sure it's not just "combing" - which is normal behaviour for many auto-levels functions. Does the same thing happen in Photoshop levels ?

Copy and paste this link (don't click - it won;t work !) to see a before CS2 auto-levels(top) and after (below) example from one of my out-of-the-camera JPEGs

http://www.nml.uk.com/i/combing.jpg

~ Nick

[NickML]

Sorry - didn't read the original post properly. That'll teach me...

~ Nick

[Kirk Baker]

Nope. Still getting corupted, Happens when I add a color class to an image and move to the next. When I go back all of the histograms are spiking. Using XP Pro, 3GB ram, 2 TB of drives latest XP patches/upgrades.

Could you post a screen shot of the histogram before and after?

Never mind.  I was able to reproduce the issue.  Looking into it now.

-Kirk

[Kirk Baker]

Nope. Still getting corupted, Happens when I add a color class to an image and move to the next. When I go back all of the histograms are spiking. Using XP Pro, 3GB ram, 2 TB of drives latest XP patches/upgrades.

Could you post a screen shot of the histogram before and after?

Never mind.  I was able to reproduce the issue.  Looking into it now.

Found the problem (only happened if you have the preference set to save tag and color class info in IPTC/XMP metadata).  Fixed it.

Thanks for the information.

-Kirk

[Eric]

Kirk I knew you would