Hummingbird Feeders. Hummingbirds get the energy they need to maintain their astonishing metabolism primarily from flower nectar and the sugar water they find at feeders (here's the recipe). Think of them as miniature flycatchers, and sugar is just the fuel for getting their real nourishment.
afÂ·terÂ·imÂ·age. n. A visual image that persists after the visual stimulus causing it has ceased to act. Also called photogene. (ËÉËftÉrËÉªmÉªdÊ).
However, a grayscale image typically represents the Luminance component of an RGB image. That is, from RGB you translate to YCbCr and then Y is the grayscale. R, G, or B as monochromatic images can be quite distinct from the Y image. So, for image processing. Say you want to detect Red eye in an image.