Match Photoshop PNG export

[plapic]

When converting an eps to png via Photoshop the equivalent in ImageMagick has resulted in what appears to be highly saturated colours.
Here is the photoshop png

Here is the imagemagick png

What parameters would I need to tweak to match or come close to the photoshop version?
The only thing done in Photoshop is open the eps in RGB mode at 300dpi, resize the canvas and save as png with no interlace and small file size.

Currently using Version: ImageMagick 7.0.5-6 Q16 x64 2017-05-13

[fmw42]

Please post your EPS file and what version Ghostscript you are using? And your exact command line!

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gs --version

Note that PS will likely output Adobe RGB whereas ImageMagick will output sRGB unless there is a profile with your EPS file. Best to convert using profiles.

[snibgo]

This may be a CMYK profile problem. PNG can't store CMYK, so if the Ghostscript output is CMYK then IM will do a "-colorspace" conversion. I suspect you need a "-profile" conversion (as Fred says).

I also see the IM version contains spot colours. I assume these have been simply copied from the EPS. But IM doesn't process spot colours.

[plapic]

I am using Ghostscript 9.21 64bit

Command I use is
magick convert -density 300 -antialias -gravity center -extent 827x461 -interlace none test.eps -quality 100 -auto-level png24:test.png

[fmw42]

Running the following in IM 6.9.8.6 Q16 Mac OSX, I get something similar to your ImageMagick result and not the PS result. I think the issue is the spot colors that Photoshop can use and ImageMagick cannot.

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convert -density 300 -profile /Users/fred/images/profiles/AdobeRGB1998.icc test.eps -shave 10x10 -trim +repage test.png

[plapic]

I have tried this approach with a slight improvement in the result.

magick convert test.png -profile "sRGB IEC61966-21.icc" -profile "C:\Program Files (x86)\Common Files\Adobe\Color\Profiles\Photoshop5DefaultCMYK.icc" test.png

Though I'm not quiet sure why I have to add multiple profiles to get this to change.

[fmw42]

You need to add multiple profiles since the input EPS file was CMYK without a profile. It was my mistake to have missed that when examining your file. But you have the two profiles reversed. You need to specify the CMYK profile first, then the sRGB profile is last since you must convert to sRGB, since PNG does not support CMYK. I usually use USWebCoatedSWOP.icc for the CMYK profile.

This seems to be a bit better than I had before.

Code: Select all

convert -density 300 -profile /Users/fred/images/profiles/USWebCoatedSWOP.icc -profile /Users/fred/images/profiles/AdobeRGB1998.icc test.eps -shave 10x10 -trim +repage test.png

You can try different CMYK and RGB profiles (such as sRGB).

[plapic]

When I swap the profiles around as you suggested it reverts back to the original look as if no profiles were added.
I tried your example too and still the same. I'm stumped.

[fmw42]

Don't use "magick convert". Use only "magick". Does that help?

This is what I get. It looks sort of close to your PS result. I am using IM 6.9.8.6 Q16 Mac OSX with GS 9.21

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convert -density 300 test.eps -profile /Users/fred/images/profiles/USWebCoatedSWOP.icc -profile /Users/fred/images/profiles/sRGB.icc -shave 10x10 -trim +repage test_result1.png

and from IM 7.0.5.7 Q16 Mac OSX

Code: Select all

magick -density 300 test.eps -profile /Users/fred/images/profiles/USWebCoatedSWOP.icc -profile /Users/fred/images/profiles/sRGB.icc -shave 10x10 -trim +repage test_result3.png