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Today, we will learn about jpg image compression, which is a standard developed by the joint photographic experts group. It is a lossy compression method that results in some information loss. The compression mainly involves a discrete cosine transform and follows a series of steps. Firstly, the RGB image is transformed into a grayscale image. Then, the color format is converted to Y IQ, where Y represents brightness and IQ represents chrominance. Y determines the image's brightness, while UV represents the color itself. UV coordinates are then transformed, and the color transform is applied to generate the final image. The key sampling method used in jpg compression is an 8x8 grid, resulting in a significant reduction in image size.