Legacy ImageMagick Discussions Archive

Hello,

begin.png is the image base
"middles file" have same size, no image differences but not the same MD5
end7.0.8-8.png is good and end7.0.8-12.png is bad

a bug on eventual updated libpng ???

Code: Select all

del middle*.*
del end*.*

set vers=7.0.8-8
d:\cle-usb\ImageMagick-%vers%-portable-Q16-x64\convert -units PixelsPerInch -density 300 -quality 100 +repage -scene 1 begin.png -transparent white middle%vers%.png
d:\cle-usb\ImageMagick-%vers%-portable-Q16-x64\convert -units PixelsPerInch -density 300 -quality 100 -crop 2850x79+35+47 +repage middle%vers%.png end%vers%.png

rem Now let's cut and paste above to below and only modifying the version number

set vers=7.0.8-12
d:\cle-usb\ImageMagick-%vers%-portable-Q16-x64\convert -units PixelsPerInch -density 300 -quality 100 +repage -scene 1 begin.png -transparent white middle%vers%.png
d:\cle-usb\ImageMagick-%vers%-portable-Q16-x64\convert -units PixelsPerInch -density 300 -quality 100 -crop 2850x79+35+47 +repage middle%vers%.png end%vers%.png

rem "middles file" have same size but not the same MD5
rem end7.0.8-8.png is good and end7.0.8-12.png is bad
pause

https://drive.google.com/open?id=13dPuT ... cxp-WgN7h8

googledrive link on my first message shows the directory and all images...

Your command syntax is bad. Command operations should be in the order you want them executed. For example, read the image before cropping it, not after.

For v7, I suggest you use "magick" not "convert" or "magick convert".

Hello, where you find error ? i moved repage and deleted -scene 1... nothing happends.

d:\cle-usb\ImageMagick-%vers%-portable-Q16-x64\convert -units PixelsPerInch -density 300 -quality 100 -crop 2850x79+35+47 +repage middle%vers%.png end%vers%.png

You command crops, and then reads the image. That is wrong. You should read the image first, and then crop, and change the density.

same thing.

Add -strip to your command-line, just before your output image. You should now get the same checksum.

You right but same kind of bug occurs for others samples:

https://github.com/ImageMagick/ImageMagick/issues/1362

Legacy ImageMagick Discussions Archive

conversion on IM7.0.8-8 worked, not in 7.0.8-12

conversion on IM7.0.8-8 worked, not in 7.0.8-12

Re: conversion on IM7.0.8-8 worked, not in 7.0.8-12

Re: conversion on IM7.0.8-8 worked, not in 7.0.8-12

Re: conversion on IM7.0.8-8 worked, not in 7.0.8-12

Re: conversion on IM7.0.8-8 worked, not in 7.0.8-12

Re: conversion on IM7.0.8-8 worked, not in 7.0.8-12

Re: conversion on IM7.0.8-8 worked, not in 7.0.8-12

Re: conversion on IM7.0.8-8 worked, not in 7.0.8-12