image color change with transparency (sample code inside)

[Ravinderjit S.Sidhu]

Code: Select all

convert    input.png    -fill #EAAB01 -opaque #000000  -colorize 100%   output.png

input.png file contains a single shape whose color is black (#000000).

The above statement changes this black color (#000000) into Yellow color (#EAAB01) of the image and we gets the new image in (output.png).

My question is : How I can get output image with yellow color (#EAAB01) with some transparency (alpha).

[magick]

You can introduce transparency by adding alpha to your opaque color value (e.g. #000000cc). You may need the -matte option to tell ImageMagick you want an alpha channel in your image.

[anthony]

An example image can also help. For example is the shape anti-aliased or what. Usually a shape is defined as either a greyscale mask, or a colored shape on transparency, the example will let us know exactly what you are dealing with.