Saved jpg photo is not the same as PS image!!!!
Sep 19, 2017 16:10:07 #
shelty wrote:
Remember every time you save a jpeg it looses data.
If the first time you save it you save at max quality and then whenever you view it you only close the file without using the save function, you will maintain the pictures quality. A jpeg only loses when you 'save' so if you don't alter the file you won't lose. You can pull the image up, print and close as often as you like.
Sep 19, 2017 17:15:50 #
Sep 20, 2017 07:00:45 #
aptrpt12 wrote:
I have been working on a dark PS image with a few layers, have saved that as a PS file. I reopen it and it still is exactly the way it was last BUT when I save it as a jpg file and open it, it is now much darker. What is happening, what can I do to correct this? It shows dark when I view it in preview, or if I take a screen shot of the original in PS, the screen shot is also dark like the jpg version. Would love some help, suggestions, insight.
There are at least two places were this could have gone wrong.
Check to see what your working color space is, Menu>Edit>Color Settings. You will see a listing for Working Spaces. For RGB it should be ProPhoto - the largest color gamut - which the best color profile to use in order preserve all the color in your image. A little further down you'll see Color Management Policies. I use Preserve Embedded Profiles for all three RGB, CMYK and Gray. I also have Profile Mismatches and Missing Profiles with the Ask when Opening boxes both checked.
Color Space can go wrong when you use File>Save As. When you select your file format, you will be asked if you want to use the Working Color Profile, the box will be checked by default and it will show your working color profile which will be ProPhoto. This is a bad idea since most output devices - printers, displays and projectors - cannot handle ProPhoto gamut. So prior to saving the file you want to use the Edit>Convert to Profile to select sRGB, You can also pick a different rendering intent - a way to handle out of gamut colors during gamut compression . I typically use Relative Colorimetric, so out of gamut colors are rendered to the closest color that is in gamut. In this intent only the out of gamut colors are affected. Sometimes I use Perceptual, which compresses all the gamut colors to maintain the relationship between colors in the larger working color space. This can result in image-wide color shifts and lost colors. While in the convert color profile dialog, you can turn Preview on and off to see if there is a change in how the image is rendered in the smaller color space, along with how the rendering intent factors in as well.
When you save the image, the checkbox for ICC Profile: will be checked and it will show the working color space.
If you edit a raw file, you can select the conversion parameters to embed the ProPhoto color space, and by using the Preserve Embedded Profiles policy in color settings, but change the Working space to sRGB, when you open the image with ProPhoto color space embedded it will let you continue to work in that color space (it won't change it to sRGB since the embedded color space is maintained), but when you save the file you will get to decide if you want to keep the embedded color space (ICC Profile box unchecked) or if you want to change the color profile to the working color profile (ICC box checked).
You may have to read this several times if you are not familiar with color profiles and color management. Feel free to PM me if you have questions and want a quick answer, or post the question(s) here.
Sep 20, 2017 10:35:51 #
Excellent insight that you have given me, thank you kindly. I will start looking at all of these areas.
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