Legacy ImageMagick Discussions Archive

IM 6.7.6.2 Q16 Mac OSX Snow Leopard.

Glenn,

I am getting something like the following messages after processing certain png images. In this case it was after a compare of two pngs. But it has happened with convert as well at times.

convert azunh.png -shave 20x20 -fuzz 10% -trim +repage -threshold 70% azunh_test.png
convert FeAYq.png -threshold 70% FeAYq_test.png
compare -metric rmse -subimage-search 1FeAYq_test.png azunh_test.png similarity_test.png
wx=0.280560, wy=0.295820, rx=0.631070, ry=0.346230
gx=0.292570, gy=0.596170, bx=0.127380, by=0.064110
wx=0.280560, wy=0.295820, rx=0.631070, ry=0.346230
gx=0.292570, gy=0.596170, bx=0.127380, by=0.064110
6290.2 (0.0959824) @ 44,19
compare: Ignoring incorrect cHRM value when sRGB is also present `1FeAYq_test.png' @ warning/png.c/MagickPNGWarningHandler/1754.

This seems to happen only with these images, so I suspect that they are malformed. The images are from a post at viewtopic.php?f=2&t=20626&p=82691#p82684

The stuff in red above seems to be some kind of diagnostics, but perhaps you want to suppress that.

Fred

The red is the numbers that appeared in the cHRM chunk. They are wrong numbers for an sRGB image.
In libpng-1.5.4 and later these are included in a png_warning() rather than displayed with printf().

Glenn