About PS processing gif diffusion transparency dithering

[beginner]

a picture in png format(1.png):


Use PS to generate a gif image, using a diffuse transparency dithering option(1.gif):


convert 1.png -channel RGBA -separate ( +clone -remap pattern:gray50 ) +swap -combine 2.gif



What parameters can be added using convert.exe to generate the same gif as ps?

Erase red circled area content:



thanks.

[snibgo]

After cloning the alpha channel, before remapping it, you can process it any way you want. For example:

Code: Select all

convert "1104123729!2.png" -channel RGBA -separate ( +clone -black-threshold 50% -remap pattern:gray50 ) +swap -combine 2b.gif

convert "1104123729!2.png" -channel RGBA -separate ( +clone -level 50,100% -remap pattern:gray50 ) +swap -combine 2c.gif

[beginner]

convert "1104123729!2.png" -channel RGBA -separate ( +clone -level 50,100% -remap pattern:gray50 ) +swap -combine 2c.gif

Thank you very much, snibgo.

[snibgo]

Good stuff.

Incidentally, you use "pattern:gray50" as the image for remapping. This has 32*32 = 1024 pixels, each of which is either black or white. So IM has to create the 1024 pixels, then analyze them to find those colours. This part of the command will be much faster if you create an image with just two pixels, for example "-size 2x1 pattern:gray50".

[beginner]

Thank you for your help
May joy and health be with you always.