@samj’s thread Place some points on outlines with G'MIC got me thinking about making a starry sky out of an image. Here is what I have come up with so far:
I am naive about what stars are supposed to look like because I haven’t really examined a night sky. In my mind, stars should be round points of various sizes, colors and intensities, with a small Gaussian blur and perhaps a twinkle caused by our atmosphere and other forms of scattering (e.g., as a result of the camera hardware). Right now the image has lines, though I have finely chopped them up.
I will address color first. I would have to know how to color each line-object with a random but plausible color. I blotted out the greens and purples to the rainbow_lut but don’t know how to remove the black bars. I would also have to randomize the intensities within a reasonable range.
