if image is grayscale, make red, green, and blue equal to the image, otherwise get the red, green, and blue using imsplit()
Use addition or subtraction to change each color channel.
Combine into color image using cat(3, red, green, blue)
How do I combine RGB images in PixInsight?
In PixInsight open your LRGB images, and combine your RGB images using the LRGBCombination tool. Un-check Lum and load the RGB channels with your RGB images. Open STF, and apply an auto stretch to the newly created RGB image see type what type of gradients are in the image.
How do I write on gimp?
Activate the command. You can find this command in the image window menu under Colors → Components → Compose…. It is enabled if your image is grayscale.
What is an RGB image?
RGB Image Interleaving. An RGB (red, green, blue) image is a three-dimensional byte array that explicitly stores a color value for each pixel. RGB image arrays are made up of width, height, and three channels of color information. Scanned photographs are commonly stored as RGB images.
What is RGB channel?
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.