by Chris Peterson » Wed Oct 17, 2012 3:29 pm
RickM wrote:A detailed solar view was captured originally in a very specific color of red light, then rendered in black and white, and then color inverted. Once complete, the resulting image was added to a starfield, then also color inverted.
if you color invert a black and white picture, don't you still have a black and white picture? How then does the sun's image get its bluish cast?
The original description is a bit off. Actually, the source image should be described as monochromatic: there is only a single value (intensity) associated with each pixel. This is how the image was collected, not rendered. The result of this sort of imaging is a grayscale image. However, such images are often rendered in color, using some sort of mapping between intensity and color, since this can let us see more detail, and also can provide a more aesthetically pleasing image. That appears to have been done here.
[quote="RickM"][quote]A detailed solar view was captured originally in a very specific color of red light, then rendered in black and white, and then color inverted. Once complete, the resulting image was added to a starfield, then also color inverted. [/quote]
if you color invert a black and white picture, don't you still have a black and white picture? How then does the sun's image get its bluish cast?[/quote]
The original description is a bit off. Actually, the source image should be described as monochromatic: there is only a single value (intensity) associated with each pixel. This is how the image was collected, not rendered. The result of this sort of imaging is a grayscale image. However, such images are often rendered in color, using some sort of mapping between intensity and color, since this can let us see more detail, and also can provide a more aesthetically pleasing image. That appears to have been done here.