originally posted here but it looks like a bug:
viewtopic.php?f=1&t=12667
Basically "-white-threshold" works like "-black-threshold" since the following command gives a BLACK canvas.
convert -white-threshold 1 zimage.png zimage.png
I get this bug using the most current version: ImageMagick-6.4.7-5-Q16
After some hunting I found a version in which that command works: ImageMagick-5.5.7-Q16
I've had one other person confirm this bug.
-white-threshold converts to black
Re: -white-threshold converts to black
This bug was fixed recently. We need to get updated ImageMagick Windows binaries released. Look for them tomorrow. Thanks.
- fmw42
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Re: -white-threshold converts to black
magick wrote:This bug was fixed recently. We need to get updated ImageMagick Windows binaries released. Look for them tomorrow. Thanks.
It is not just a Windows issue. I had it fail for me on IM 6.4.7-5 Q16 Mac OSX Tiger.
Re: -white-threshold converts to black
Try ImageMagck 6.4.7-6. The -white-threshold option appears to be working correctly.
- fmw42
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Re: -white-threshold converts to black
convert rose: -white-threshold 1 tmp.pngmagick wrote:Try ImageMagck 6.4.7-6. The -white-threshold option appears to be working correctly.
seems to work properly again to make a white (rather than black image) for IM 6.4.7-6 Q16 Mac OSX Tiger