I use magick.exe to convert image files to black and white.
It is ok in 7.0.8 previously.
However, in 7.0.9, the image generated is gray scale and 256 colors (I use IrfanView to view the image information).
Here is the input png image:

In 7.0.8, I use the following command:
Code: Select all
"C:\Program Files\ImageMagick-7.0.8-Q16\magick.exe" convert test1.png -monochrome test1.magick.708.png

In 7.0.9, I use the following command:
Code: Select all
"C:\Program Files\ImageMagick-7.0.9-Q16\magick.exe" convert test1.png -monochrome test1.magick.709.png

ImageMagick version:
ImageMagick-7.0.9-7-Q16-x64-static.exe
Please advise. Thanks.
Best Regards,
Clive