Image color
- grayscales : i rtrue render image as gray scale
- grayscale-luminosity : if true render image as
- grayscale-averaging : define averaging of image
- crystallize : crystallize filter
- glow : glow filter
- sepia : sepia filter (0>10)
- contrast : 0 >> 1 transform constrast
- brightness : 0 >> 1 brightness
- dashed : 0 >> 1