Legacy ImageMagick Discussions Archive

hi,
I am new to imagesmagick and try to convert EPS with clipping path to png. The png should only have image with transparent background. I searched forum and found some similar topics using script:
convert -colorspace "sRGB" input.eps -alpha "transparent" -clip -alpha "opaque" output.png
When i apply this script, the -clip removes image rather than background. So the output.png becomes a white with nothing on it.
I also tried
convert input.eps +clip-path "#1" -alpha "transparent" output.eps
I get the same result. Can anyone help me? I am using IM-7.0.5-Q16 and Ghostscript 9.21.

In IM 7 you need to use magick in place of convert. See viewtopic.php?f=3&t=31924&p=146061&hilit=clip#p146049. The bug was fixed in IM 7.0.5.6. So depending upon your 7.0.5.x version, you may need to upgrade Imagemagick.

For novices, see

viewtopic.php?f=1&t=9620http://http://w ... essing.php
http://www.imagemagick.org/Usage/reference.html
http://www.imagemagick.org/Usage/

Thank you. I have upgraded to IM 7.0.6 and clip works on eps file. But the converted png file has very jagged edge. Is any way i can make it better?

Can you upload your EPS file to some place such as dropbox.com and put the URL here so we can test with it. If not, then try

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convert -density 288 input.eps +clip-path "#1" -alpha "transparent" -resize 25% output.eps

or just leave the -resize 25% out.

I tried your script and get the same jagged edge. My current script is:
magick -density 300 -depth "8" -colorspace "sRGB" input.eps -alpha "transparent" -clip -alpha "opaque" -resize "400x400" output.png
I also try to add -fuzz 1% -fill none but no luck.
I don't have dropbox account. My eps file is about 40MB. Any other way i can send eps through?

Only way is if you have our own server and can upload there. Dropbox is free, so that is a good solution.

This works for me? Does it work for you?

http://www.fmwconcepts.com/misc_tests/c ... OV_EPS.eps

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convert -density 150 -colorspace sRGB 218755504_HOV_EPS.eps -alpha transparent -clip -alpha opaque -strip 218755504_HOV_EPS_im6.png

If that works, try

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convert -density 600 -colorspace sRGB 218755504_HOV_EPS.eps -alpha transparent -clip -alpha opaque -strip -resize 25% 218755504_HOV_EPS_im6_2.png

Why are you using +clip-path "#1"?

The + sign turns off that clip path. See http://www.imagemagick.org/Usage/masking/#clip-path

The script
convert -density 600 -colorspace sRGB 218755504_HOV_EPS.eps -alpha transparent -clip -alpha opaque -strip -resize 25% 218755504_HOV_EPS_im6_2.png
has better output than the first one. But the right edge of png image is better than the left and top edge. I also tried couple of my own eps images and got the same result. very interesting. Not sure how i fix the left and top edge issue.
What's the delegate libpng version included in the Windows IM 7.0.6-Q16? If i remove -strip, i get the error message:
"convert: profile 'icc': 'CMYK': invalid ICC profile color space @ warning/png.c/MagickPNGWarningHandler/1744."
If i use -strip, i can only get 72dpi png not 300dpi which i want.

Here is my eps file:
https://www.dropbox.com/s/1wctctliylpsm ... 1.eps?dl=0

This works for me on IM 6.9.9.5 Q16 and IM 7.0.6.5 Q16 HDRI Mac OSX and produces a transparent background PNG. If it works for you and you want an EPS output, then change the output suffix to .eps. (for IM 7 change convert to magick)

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convert -density 300 -units pixelsperinch -colorspace srgb test1.eps -alpha transparent -clip -alpha opaque -strip test1_output.png

Thank you for the script. I know where is the jagged issue from. It's from -resize
If i do your script:
convert -density 300 -units pixelsperinch -colorspace srgb test1.eps -alpha transparent -clip -alpha opaque -strip test1_output.png
I get the good anti-aliased result, but if i want to resize png to certain size, i do:
convert -density 300 -units pixelsperinch -colorspace srgb test1.eps -alpha transparent -clip -alpha opaque -strip -resize 1000x1000 test1_output.png
I get the jagged edge. Looks like -resize causing the issue.
If i use pipe to get the output png,
"magick -density 300 -units pixelsperinch -colorspace srgb test1.eps -alpha transparent -clip -alpha opaque -strip PNG:- | magick - -resize 1000x1000 test1_output.png"
The jagged issue is gone.
Any other way i can fix this jagged issue without using pipe command? Since IM4Java needs bit more code to work out pipe thing.

I do not see any aliasing with this command with the addition of -resize 1000x1000 using IM 6.9.9.5 Q16. But I do with IM 7.0.6.5 Q16 HDRI. That looks like a bug or an HDRI issue.

IM 6

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convert -density 300 -units pixelsperinch -colorspace srgb test1.eps -alpha transparent -clip -alpha opaque -strip -resize 1000x1000 test1_output2a.png

IM 7

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magick -density 300 -units pixelsperinch -colorspace srgb test1.eps -alpha transparent -clip -alpha opaque -strip -resize 1000x1000 test1_output2b.png

If you still have trouble, then you can antialias by blurring the edges of the alpha channel. Try

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magick -density 300 -units pixelsperinch -colorspace srgb test1.eps -alpha transparent -clip -alpha opaque -strip -resize 1000x1000 -alpha on -channel a -blur 0x3 -level 50x100% +channel test1_output3.png

Increase or decrease the 3 on -blur 0x3 as desired for more or less anti-aliasing.

However, you do point out that it does not occur if you pipe before resizing.

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magick -density 300 -units pixelsperinch -colorspace srgb test1.eps -alpha transparent -clip -alpha opaque -strip PNG32:- | magick - -resize 1000x1000 test1_output2c.png

See https://www.imagemagick.org/discourse-s ... =3&t=32497.

Thank you all. This issue is resolved.

Legacy ImageMagick Discussions Archive

EPS with clipping path convert to png with transparent background

EPS with clipping path convert to png with transparent background

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Re: EPS with clipping path convert to png with transparent background

Re: EPS with clipping path convert to png with transparent background

Re: EPS with clipping path convert to png with transparent background

Re: EPS with clipping path convert to png with transparent background

Re: EPS with clipping path convert to png with transparent background

Re: EPS with clipping path convert to png with transparent background

Re: EPS with clipping path convert to png with transparent background

Re: EPS with clipping path convert to png with transparent background

Re: EPS with clipping path convert to png with transparent background