[magick-users] Convert Verify Output File.

[Fred Weinhaus]

But you had no input image. Is your input binary already 
(thresholded)? Clarify or provide a link to your input image.

If all you want is to turn black to transparent in your input image, then

convert input.suffix -transparent black -depth 8 output.png


If your image is not binary and you want it to be binary (black and 
white) and black transparent, then

convert input.suffix -threshold xx% -transparent black -depth 8 output.png


for example;

convert -size 100x100 gradient: -threshold 50% -transparent black 
-depth 8 tmp.png



>
>I am trying to produce a binary representation of my input file where
>all black pixels are transparent.
>
>Chris
>
>  >
>  >
>  >
>  >
>  >  
>  >> Hi All,
>  >>
>  >> Firstly let me say thank you very much for all help provided thus far. I
>  >> am still seeing something kind of strange.
>  >>
>  >> When I perform a convert.
>  >> convert -depth 8 -size 512x512 - transparent black - matte demo.jpg
>  >> demo.rgba.
>  >>
>  >> My Icons seem to be appearing completely transparent for some reason.
>  >>
>  >> 1. What's the best way to verify my rgba file
>  >> 2. I looked at the properties of the file which said it was 32x32 which
>  >> kind of struct me as odd as I suspected it would be at the very least
>  >> 64x64 or 512x512...
>  >> 3. I suspect the problem with my images being transparent is my alpha
>  >> values are messed up. I was wondering if anyone could know why/how I can
>  >> check this.
>  >>
>  >> Thanks,
>  >>
>  >> Cheers
>  >> Chris