lower truncation - significado y definición. Qué es lower truncation
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Qué (quién) es lower truncation - definición

LOSSY IMAGE COMPRESSION TECHNIQUE
Block truncation coding

Cheque truncation         
CHECK SCANNING TO OBVIATE PAPER DELIVERY TO THE CHECK'S BANK
Truncation (banking); Check truncation
Cheque truncation (check truncation in American English) is a cheque clearance system that involves the digitization of a physical paper cheque into a substitute electronic form for transmission to the paying bank. The process of cheque clearance, involving data matching and verification, is done using digital images instead of paper copies.
Lower Arrernte language         
EXTINCT AUSTRALIAN ABORIGINAL LANGUAGE
Lower Aranda language; Lower Arrernte dialect; Lower Arrernte; Lower Southern Aranda language; Lower Aranda; ISO 639:axl; Lower Aranda dialect; Lower Southern Aranda; Alenjerntarpe language; Alenjerntarrpe
Lower Arrernte, also known as Lower Southern Arrernte, Lower Aranda, Lower Southern Aranda and Alenjerntarrpe, was an Arandic language (but not of the Arrernte language group). Lower Arrernte was spoken in the Finke River area, near the Overland Telegraph Line station at Charlotte Waters, just north of the border between South Australia and the Northern Territory, and in the Dalhousie area in S.
second chamber         
  • [[Australian House of Representatives]]
  • United Kingdom House of Commons]]
CHAMBER OF A BICAMERAL LEGISLATURE
Lower House; Second chamber; Lower chamber
The second chamber is one of the two groups that a parliament is divided into. In Britain, the second chamber is the House of Lords. In the United States, the second chamber can be either the Senate or the House of Representatives.
N-SING

Wikipedia

Block Truncation Coding

Block Truncation Coding (BTC) is a type of lossy image compression technique for greyscale images. It divides the original images into blocks and then uses a quantizer to reduce the number of grey levels in each block whilst maintaining the same mean and standard deviation. It is an early predecessor of the popular hardware DXTC technique, although BTC compression method was first adapted to color long before DXTC using a very similar approach called Color Cell Compression. BTC has also been adapted to video compression.

BTC was first proposed by Professors Mitchell and Delp at Purdue University. Another variation of BTC is Absolute Moment Block Truncation Coding or AMBTC, in which instead of using the standard deviation the first absolute moment is preserved along with the mean. AMBTC is computationally simpler than BTC and also typically results in a lower Mean Squared Error (MSE). AMBTC was proposed by Maximo Lema and Robert Mitchell.

Using sub-blocks of 4×4 pixels gives a compression ratio of 4:1 assuming 8-bit integer values are used during transmission or storage. Larger blocks allow greater compression ("a" and "b" values spread over more pixels) however quality also reduces with the increase in block size due to the nature of the algorithm.

The BTC algorithm was used for compressing Mars Pathfinder's rover images.