Chroma subsampling
Videos
Chroma subsampling or color subsampling is the practice of encoding images by implementing less resolution for chroma information than for luma information, taking advantage of the human visual system
In full size, this image shows the difference between four subsampling schemes. Note how similar the color images appear. The lower row shows the resolution of the color information.
JPEG
Videos
JPEG is a commonly used method of lossy compression for digital images, particularly for those images produced by digital photography. The degree of compression can be adjusted, allowing a selectable
Chroma subsampling
…acuity for color differences than for luminance. It is used in many video and still image encoding schemes – both analog and digital – including in JPEG encoding. Digital signals are often compressed to reduce file size and save transmission time. Since the human visual system is much more sensitive to…
A photo of a European wildcat with the compression rate, and associated losses, decreasing from left to right
The compressed 8×8 squares are visible in the scaled-up picture, together with other visual artifacts of the lossy compression.
Visual impact of a jpeg compression on Photoshop on a picture of 4480x4480 pixels
An example of a stereoscopic .JPS file