These options determine how PMView will reduce the number of colors when loading an image.
Palette
· Adaptive This will select the best colors for the image.
· System This will only use colors in the system palette.
· 8-8-4 levels This will use the vaunted 3-3-2 bits fixed palette, that is, a palette with 8 intensity levels for the Red and Green components and 4 levels for Blue.
· 6-7-6 levels This will use a 6-7-6 level fixed palette, that is, a palette with 6 intensity levels for the Red and Blue component and 7 levels for Green.
· 6-6-6 levels This will use a 6-6-6 level fixed palette, that is, a palette with 6 intensity levels for each color component, thus the image will be reduced to a maximum of 216 colors. This palette is well suited for systems with palette manager since the Palette Manager works best if the palette contains no more than 236 color entries.
Dither
· None The colors will be selected on best match basis. The color error is not compensated.
· Ordered Ordered dithering is used to compensate the error. Ordered dithering can only be used with R-G-B level palettes.
· Diffusion Floyd-Steinberg error diffusion dithering is used to compensate the color error.
Preference Palette Dither
Best color quality Adaptive Diffusion
Fastest loading 6-6-6 level Ordered
Suppress flicker 6-6-6 level Diffusion
System default .Adaptive None
Note: You can suppress the palette flicker that normally occurs when you run multiple PMView sessions by selecting one of the fixed palettes.