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Image compression is a type of data compression applied to digital images, to reduce their cost for storage or transmission. Algorithms may take advantage of visual perception and the statistical properties of image data to provide superior results compared with generic data compression methods which are used for other digital data.
This is an accepted version of this page This is the latest accepted revision, reviewed on 26 January 2025. Lossy compression method for reducing the size of digital images For other uses, see JPEG (disambiguation). "JPG" and "Jpg" redirect here. For other uses, see JPG (disambiguation). JPEG A photo of a European wildcat with the compression rate, and associated losses, decreasing from left ...
Composite image showing JPG and PNG image compression. Left side of the image is from a low-quality JPEG image, showing lossy artefacts; the right side is from a PNG image. In information technology , lossy compression or irreversible compression is the class of data compression methods that uses inexact approximations and partial data ...
Take a 4×4 block from an image, in this case the mountain test image: [7] Like any small block from an image this appears rather boring to work with as the numbers are all quite similar, this is the nature of lossy compression and how it can work so well for images.
An I‑frame (intra-coded picture) is a complete image, like a JPG or BMP image file. A P‑frame (Predicted picture) holds only the changes in the image from a previous frame. For example, in a scene where a car moves across a stationary background, only the car's movements need to be encoded.
.img is also a planar bitmap graphics file using simple run-length encoding, originating with Digital Research's GEM.It was commonly used on the Atari ST line of home computers, but also with some GEM-based PC software such as Corel Ventura or Timeworks Publisher.
Xanh SM electric motorcycle on the streets of Hanoi. GSM was founded by Phạm Nhật Vượng with a charter capital of 3,000 billion VND, of which Phạm Nhật Vượng holds 95% of the shares. [2]
Syria, [d] officially the Syrian Arab Republic, [e] [15] is a country in West Asia located in the Eastern Mediterranean and the Levant.It borders the Mediterranean Sea to the west, Turkey to the north, Iraq to the east and southeast, Jordan to the south, and Israel and Lebanon to the southwest.