The RGB color model uses the three primary additive colors: red, green, and blue, with each color channel ranging from 0 to 255. In this system, a total of 256 intensities are available for each channel, resulting in over 16.7 million possible colors (256^3).
Red : 0 to 255
Green: 0 to 255
Blue: 0 to 255
Each color requires 8 bits and therefore the color depth of an RGB images is 24 bits.
RGB color demonstration
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How many bits are used to represent the color intensity for each channel in RGB images?
Which primary color in RGB is associated with the value (255, 0, 0)?
What is the result of adding pure red (255, 0, 0) and pure green (0, 255, 0) in RGB color model?
color depth
Bit Depth
Bit depth, also known as color depth, is the amount of color information stored in each pixel of an image. It determines how finely an image can represent color variations and is measured in bits.
The higher the bit depth, the greater the number of colors that can be represented, resulting in richer, more detailed images.
The bit depth defines how many bits are used to store the information for each of these color channels.
The most common bit depth is 8 bits per channel for RGB, resulting in a bit depth of 24 bits per pixel.
The term 'bit depth' refers to the number of used to represent the color of a single pixel in an image.
Image Bit Depth Examples
Higher bit depths allow for a greater range of in an image, resulting in more accurate color representation.
PNG (Portable Network Graphics) is a widely used image format known for its lossless compression, which preserves image quality without data loss. One of its key features is the alpha channel, which allows for transparency in images, enabling smooth blending with backgrounds.
Key Features:
Lossless Compression: No image quality is lost during compression.
Alpha Channel: This extra channel controls pixel transparency. It allows images to have varying levels of opacity, from fully opaque (alpha = 255) to fully transparent (alpha = 0).
Transparency: PNG's alpha channel is perfect for creating images with transparent backgrounds or semi-transparent areas, making it ideal for logos, icons, and graphics that need to blend seamlessly into other elements.