Green in thumbs turning to grey in full screen images??

[markush]

Ok guys something is going on that i really need help with. I set up some fabrics to do a still life type of photo. I have an iridesent purple in the forground and a green sponge painted looking peice for the background. Took a couple shots to see how i should set up the lighting. Everything looks good on the camera as far as colors matching what is there (shooting raw and sRGB). Also looks good in the THUMBS when veiwed with either EOS Veiwer or DPP, BUT when i click on the thumbs in either Veiwer or DPP to veiw/edit full size images the green background changes to a grey!?

In DPP, tools, preferences, the "default settings of color workspace" is sRGB and the "color matching settings for the display" is also set to sRGB. Whats hapening between looking at the thumbs to veiwing full screen that's changing my green to grey?

[Poco]

The thumb view is of the thumbnail actually in the RAW file while the fullscreen view is the software attempting to convert the RAW to screen view. What happens when you process and save to a JPEG or TIFF? Do you get the same look? I would normally expect DPP to keep the camera settings by default so the output should look the same as the thumbnail (assuming the thumbnail is generated in the camera using the same settings that were saved in the RAW). However, the fullscreen preview may not be quite as good (considering how much longer it takes to process the final file vs. how long it takes to view the file) than the final output.

How are you calculating the white balance? Are you using auto or manual or preset? If your entire scene is green and purple the auto white balance is probably going to go crazy. I would do a manual white balance with a piece of white paper in front of your purple thing.

[markush]

When i convert to tiff and open in Elements it is the same as the full size images which means it has the grey background. I converted with both EOS Vewier and DPP just to make sure. White balance is set to auto as i was just doing intial shots to see what was going on in the scene. Even so, the THUMBS in both programs look perfect as far as color goes...the same for the preveiw on camera...the green is green. I do notice in DPP, right after i click the thumb and the full screen image pops up, that for about 1 second the images is perfect...green is green but then it changes to grey right before my eyes.

[Poco]

It changes before your eyes because DPP initially starts by showing your the embedded image while it converts the RAW data and then switches it.

Check your settings in DPP. Check the white balance. It sounds like one of the settings in the RAW file is different than the settings used to create the original thumbnail. Unless there is something white or grey in your scene the auto white balance is a crap shoot. What happens if you take the photo as a JPEG?

[markush]

ok i just shot it in jpeg and background stays green when i view full screen. So it appears to be just RAW that i have this problem with. I've looked at my settings in DPP a dozen times tonight and i cannot see anything out of the ordinary all the adjustment on the RAW tool palette are at the defaults and or 0. But whatever is happening is also happening in EOS Viewer so I'm guessing it can't just be a setting in DPP that is causing this.

[Poco]

Check your White balance adjustment and Color adjustment. Have you tried choosing a different white balance or click on "Tune..." to manually edit the white balance? Also, it might help if you posted the good and the bad JPEG to compare.

[markush]

When i shot the scene in JPEG everything was ok, the color in the full screen image matches the color in the thumbnail, which matches the on camera LCD, which matches the scene as i see it. The only time i get the color shift is with the full screen RAW images. Is there a way i can post a screen capture to the forum?

With the RAW tool palette I can tweak the white balance adjustment to get the green background on the full screen image to most closely match the scene by changing the color temperature to 5100 kelvin. BUT the way i understand it and please tell me if i am wrong....I'm thinking that the only thing that should effect the color between the RAW thumbnail image i see and the full screen image is the settings in the RAW tool palette. But when everything is set to the shot settings or 0 adjustments i get the color shift.

[Sathi]

I believe I was having this exact same problem converting raw fireworks pictures. I noticed the effect in DPP, RSE, and capture one. When the images were in preview mode the colours looked correct and how I wanted them. When I would view them full screen or convert them all the colours looked washed out...shifted towards white and grey tones. I believe what is going on here is the converters are trying to eliminate CA in your picture. It thaught the super bright streaks of fire set against the dark background was CA and tried to correct it. Its just a guess, but I never noticed this happening in any other picture besides the fireworks, so it may be the case. I think the
iridesent purple you have might be triggering it. I have switched to adobe camera raw which does not do this and have been able to process my fireworks pictures with success. Too bad the adobe converter seems noticably noisier than the other converters. In fact it can make noisy images even when I have the anti noise options maxed out. But when I throw it into photoshop the reduce noise filter takes care of the noise with MUCH less aggressive settings. I will probably get neat image or noise ninja soon to get around this.

[Poco]

When i shot the scene in JPEG everything was ok, the color in the full screen image matches the color in the thumbnail, which matches the on camera LCD, which matches the scene as i see it. The only time i get the color shift is with the full screen RAW images. Is there a way i can post a screen capture to the forum?

With the RAW tool palette I can tweak the white balance adjustment to get the green background on the full screen image to most closely match the scene by changing the color temperature to 5100 kelvin. BUT the way i understand it and please tell me if i am wrong....I'm thinking that the only thing that should effect the color between the RAW thumbnail image i see and the full screen image is the settings in the RAW tool palette. But when everything is set to the shot settings or 0 adjustments i get the color shift.

The colour temperature (white balance) is one of the things that is also set at conversion time. It was set to something when the thumbnail was made and obviously defaulted to a different value in DPP. It may be that because you chose "auto" that DPP tried to automatically set the colour temp itself rather than using the "auto" setting from the camera and they each came up with a different interpretation (what camera do you have?).

Manual white balance is the only way to go if you have a few seconds and are shooting in a setting like this. Particularly because of your green background. If there is nothing white or light grey in the scene then I believe "auto" will try to make the lightest thing in the scene white. If that was green then all the green will turn grey and voila! Even if you just put something white or light grey on the side of the scene that you can crop out later you can use that for the colour picker in DPP. Whatever you click on with the colour picker will become grey so if you click on something that is supposed to be neutral white or grey then the colours should be set correctly.