SarahS76 Posted March 28, 2016 Share Posted March 28, 2016 Is it normal for the histogram to change when saving a PSD file as a JPEG? I have a situation where my PSD file shows one tiny catchlight in an eye that is at 255 on the histogram. The rest of the image is well within range. I pull up the JPEG that I saved, and there is now a larger catchlight in BOTH eyes, plus a patch of teeth, and a few small patches of skin on the edge of an ear at 255 on the histogram. The photo the LAB received from me, they are telling me that patches of the people's faces, AND one whole white shirt are completely blown out as well. What could be causing this? Thanks! Link to comment Share on other sites More sharing options...
Christina Keddie Posted March 28, 2016 Share Posted March 28, 2016 Are you sure you're working in sRGB? http://www.damiensymonds.net/art_tscs000.html Link to comment Share on other sites More sharing options...
SarahS76 Posted March 28, 2016 Author Share Posted March 28, 2016 Yes. Link to comment Share on other sites More sharing options...
Christina Keddie Posted March 28, 2016 Share Posted March 28, 2016 OK, so can you screenshot these screens for us? One with your entire PS window with the PSD open (plus the histogram where you're viewing these numbers), and one with the JPG file? BTW, this is how I'd recommend checking for clipping: http://www.damiensymonds.net/tut_clip.html Link to comment Share on other sites More sharing options...
SarahS76 Posted March 28, 2016 Author Share Posted March 28, 2016 OK, yes, i used Levels to check for clipping, and that's where I was seeing it on the JPEG, but only on the catchlight in the woman's eye in the PSD (and on the metal clamp on the left, but that's obviously cropped out later). Attaching screenshots. This was for a piece of photo jewelry. It was apparently printed on pearl paper, which I did not know going in. I do not have a copy of the file the guy at the lab was looking at, but he said the boy's shirt was completely blown out on that copy, and it is not on mine. Link to comment Share on other sites More sharing options...
SarahS76 Posted March 28, 2016 Author Share Posted March 28, 2016 I also just did soft-proofing with the color profiles from the lab, and there is negligible change, mainly in the mom's neck area, which was not a problem in the finished jewelry. Link to comment Share on other sites More sharing options...
Damien Symonds Posted March 28, 2016 Share Posted March 28, 2016 What quality level did you save the jpeg at? Link to comment Share on other sites More sharing options...
SarahS76 Posted March 29, 2016 Author Share Posted March 29, 2016 10 Link to comment Share on other sites More sharing options...
Damien Symonds Posted March 29, 2016 Share Posted March 29, 2016 That should be high enough not to cause change. How were you checking for clipping? Link to comment Share on other sites More sharing options...
SarahS76 Posted March 29, 2016 Author Share Posted March 29, 2016 Well, on the PSD file, as I was working on each levels layer to adjust contrast, I tried to never touch the ends of the histogram completely. And for the most part, the PSD files are fine. When I open up the jpeg, I added a blank levels layer on the top, and clicked "ALT" and the right histogram slider thing. I'm seeing some clipping, though minor, on the JPEG--definitely more than the PSD, though. The guy at the lab said he was using the levels layer method as well and saw clipping all over. The file was uploaded via ROES. Link to comment Share on other sites More sharing options...
Damien Symonds Posted March 29, 2016 Share Posted March 29, 2016 Hang on, did you add the levels layer over the top of all the other layers in the PSD, and check that way? Link to comment Share on other sites More sharing options...
SarahS76 Posted March 29, 2016 Author Share Posted March 29, 2016 Yes. Is that wrong? Link to comment Share on other sites More sharing options...
Damien Symonds Posted March 29, 2016 Share Posted March 29, 2016 No, it's right, but you didn't actually mention that you'd done it? Link to comment Share on other sites More sharing options...
SarahS76 Posted March 29, 2016 Author Share Posted March 29, 2016 Sorry. It was a long day yesterday. I checked both the PSD and the JPEG using the Level layer method, and there was significantly more clipping on the PSD. Where there was only one point of clipping on the PSD (a catchlight), the JPEG had clipping in two catchlights, the woman's teeth, and along the boy's right ear. Then, the employee at the lab said he was also seeing clipping, using the same Levels method, on faces and the boy's shirt. Link to comment Share on other sites More sharing options...
SarahS76 Posted March 29, 2016 Author Share Posted March 29, 2016 OK, I've done an experiment. I've gone back to the file, and edited so there is no clipping. I saved as a JPEG, no clipping. Then, I applied sharpening: clipping EVERYWHERE. So, the sharpening is introducing the clipping. Does this mean my file was too close to the edges of the histogram to begin with? Is there any way to predict how much the sharpening will lead to clipping? I've never noticed this happening before, but I've always assumed if my file was clipping-free when I was done editing it, that it was good to go. Clearly, I was wrong. P.S. I have taken the print sharpening class and am following those instructions to complete the sharpening. Link to comment Share on other sites More sharing options...
SarahS76 Posted March 29, 2016 Author Share Posted March 29, 2016 (edited) I have now completely re-edited my file. I reduced exposure in RAW, even though it didn't need it based on the histogram. I have reduced midtones and did NOT push highlights during my levels editing. I had NO clipped areas when I had completed the edit. I cropped the file at 300ppi, and did NOT save as a JPEG yet. Did NOT sharpen yet. Clipping all over. What on earth is happening? Is it because the file size is so small, being that it's for jewelry? Edited March 29, 2016 by SarahS76 added qustion Link to comment Share on other sites More sharing options...
Damien Symonds Posted March 29, 2016 Share Posted March 29, 2016 2 hours ago, SarahS76 said: I have now completely re-edited my file. I reduced exposure in RAW, even though it didn't need it based on the histogram. I have reduced midtones and did NOT push highlights during my levels editing. I had NO clipped areas when I had completed the edit. I cropped the file at 300ppi, and did NOT save as a JPEG yet. Did NOT sharpen yet. Clipping all over. What on earth is happening? May I see screenshots for this? Link to comment Share on other sites More sharing options...
SarahS76 Posted March 29, 2016 Author Share Posted March 29, 2016 (edited) I've circled the only clipping on the PSD, and it's on something that is cropped out of the final. The final image is cropped to 1x1" at 300ppi to fit on the necklace. Hopefully you can see where the clipping is appearing on the skin now....Let me know if you wanted the images instead of the clipping. I wasn't exactly sure what you wanted to see. Edited March 29, 2016 by SarahS76 spelling mistake Link to comment Share on other sites More sharing options...
Damien Symonds Posted March 29, 2016 Share Posted March 29, 2016 Does this happen even if you save at Level 12? Link to comment Share on other sites More sharing options...
SarahS76 Posted March 29, 2016 Author Share Posted March 29, 2016 This was before even saving, so it was still the PSD file, just cropped. Link to comment Share on other sites More sharing options...
Damien Symonds Posted March 29, 2016 Share Posted March 29, 2016 Are you sure you're viewing at 100% in both cases?? Link to comment Share on other sites More sharing options...
SarahS76 Posted March 30, 2016 Author Share Posted March 30, 2016 Yes. Link to comment Share on other sites More sharing options...
Damien Symonds Posted March 30, 2016 Share Posted March 30, 2016 Ok, let's work through this. It's very rare to crop before flattening. It certainly shouldn't happen in this case. So flatten first, then check for clipping. Then crop, and check again. Report what you see. Link to comment Share on other sites More sharing options...
SarahS76 Posted March 30, 2016 Author Share Posted March 30, 2016 After flattening, there is no clipping. After cropping, there is clipping. Link to original PSD file in case you want to try it: https://www.dropbox.com/s/d83wfpaolq68pua/IMG_4762-2.psd?dl=0 Link to comment Share on other sites More sharing options...
Damien Symonds Posted March 30, 2016 Share Posted March 30, 2016 No, it doesn't do it for me. Exactly the same after cropping as before. In Preferences>General, what is your "Image Interpolation" setting set to? Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now