@ -49,6 +49,8 @@ Images are converted to grayscale automatically if the palette is grayscale. Thi
Here's an example of all color formats being used: **\--palette \'23,230,100 D24242 135 forestGreen'**
Alternative, you can write mmcq:N in lieu of color names, where N is a power of two. This will use the median cut algorithm to pick the top N colors in the image, and set those as the palette.
**-r**, **\--recolor** *COLORS*
Set the color palette used for replacing the dithered color palette after dithering. The argument syntax is the same as **\--palette**, with one exception. It also supports RGB*A* tuples, so 4 values. This means you can also choose to change the opacity of a palette color after dithering. The values are not premultiplied, so set the RGB to the color you want as you'd expect.
@ -136,7 +138,7 @@ Grayscale and RGB random dithering
Accepts two arguments (min and max) for RGB or grayscale, or six (min/max for each channel) to control each RGB channel. Arguments can be separated by commas or spaces.
Random dithering adds random noise to the image. The min and max numbers limit the range of the random noise. A good default is -0.5,0.5, which means that a middle gray pixel is 50% likely to become black and 50% likely to become white, assuming a black and white palette. So -0.2,2.0 will reduce the noise (20%), while -0.7,0.7 will increase it (70%). Values like -0.5,0.7 will bias the noise to one end of the channel(s).
Random dithering adds random noise to the image. The min and max numbers limit the range of the random noise. A good default is -0.5,0.5, which means that a middle gray pixel is 50% likely to become black and 50% likely to become white, assuming a black and white palette. So -0.2,0.2 will reduce the noise (20%), while -0.7,0.7 will increase it (70%). Values like -0.5,0.7 will bias the noise to one end of the channel(s).
makeworld
5 months ago