What does 255 mean in RGB?
In RGB, a color is defined as a mixture of pure red, green, and blue lights of various strengths. Each of the red, green and blue light levels is encoded as a number in the range 0.. 255, with 0 meaning zero light and 255 meaning maximum light.
What are channels RGB?
An RGB image has three channels: red, green, and blue. RGB channels roughly follow the color receptors in the human eye, and are used in computer displays and image scanners. If the RGB image is 48-bit (very high color-depth), each channel is made of 16-bit images.
How to display separated color channels of RGB image?
Display a color representation of each color channel. In these images, the desired color channel maintains its original intensity values and pixel values in the other two color channels are set to 0. Create an all-black channel. Display all the channels in a montage.
How does the color of a RGB image affect the image?
RGB images can dictate directly how much of each color should be used. This means that the values in each RGB channel really do determine the final image appearance, without any ambiguity regarding which LUTs should be applied because these are already known. Therefore all software can display RGB images in the same way.
How to calculate RGB image standard deviation from channels statistics?
In the NTSC Rec. 709 standard, in accordance to a change in their primaries, the luma is computed as in the above formula. It should be obvious that the formula for the luminosity uses the same coefficients but multiplying the non-linear RGB color components: the same equation but without the prime symbol.
How is a RGB image composed by three monochromatic images?
We can think about that RGB image, like composed by three monochromatic images with the same dimensions as the color image. One with the red value of each pixel in the color image pixel (the red channel), another with the green (the green channel) and another one with the blue values (the blue channel).