possible -alpha Shape bug

[jwebst]

I believe I may have the same issue that was reported as solved in a previous post https://www.imagemagick.org/discourse-s ... pe#p139313.

Input:

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convert alpha_extract.png -background blue -alpha Shape alpha_shape.tiff
convert alpha_extract.png -background blue -alpha Shape alpha_shape.png

Both of these commands result in solid blue fields on ImageMagick 7.0.5-4 Q16 and ImageMagick 7.0.5-5 Q16 for OSX

[fmw42]

These commands work fine for IM 6.9.8.4 Q16

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convert moon.png -background red -alpha shape moon_red.miff

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convert moon.png -background red -alpha shape moon_red.mpc

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convert moon.png -background red -alpha shape moon_red.png

However, they produce a solid red image for IM 7.9.8.5 Q16 Mac OSX Sierra

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magick moon.png -background red -alpha shape moon_red.miff

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magick moon.png -background red -alpha shape moon_red.mpc

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magick moon.png -background red -alpha shape moon_red.png

So there is a bug in IM 7.0.5.5

[magick]

Thanks for the problem report. We can reproduce it and will have a patch to fix it in GIT master branch @ https://github.com/ImageMagick/ImageMagick later today. The patch will be available in the beta releases of ImageMagick @ http://www.imagemagick.org/download/beta/ by sometime tomorrow.

[fmw42]

I am still getting a solid red image for the PNG command in the latest beta as of today. The MPC and MIFF work fine.

Code: Select all

im7beta magick moon.png -background red -alpha shape moon_red.png

[magick]

Thanks for the problem report. We can reproduce it and will have a patch to fix it in GIT master branch @ https://github.com/ImageMagick/ImageMagick later today. The patch will be available in the beta releases of ImageMagick @ http://www.imagemagick.org/download/beta/ by sometime tomorrow.

[fmw42]

Thanks. It seems to be fixed for the PNG result in today's beta