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나머지/IT개발.잡다한것.

Bayer data, ASP, CFA, ITU-R BT.656 , edge enhance, chroma suppression , CLUT

by 무늬만학생 2013. 3. 26.
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Audio Serial Port (ASP)
The primary use for the audio serial port (ASP) is for audio interface purposes. 


A Bayer filter mosaic is a color filter array (CFA) for arranging RGB color filters on a square grid of photosensors.
he filter pattern is 50% green, 25% red and 25% blue, hence is also called RGBG,[1][2] GRGB,[3] or RGGB.[4]
http://en.wikipedia.org/wiki/Bayer_filter



ITU-R BT.656 standard format
ITU-R Recommendation BT.656, sometimes also called ITU656, describes a simple digital video protocol for streaming uncompressed PAL or NTSC Standard Definition TV (525 or 625 lines) signals.
http://en.wikipedia.org/wiki/ITU-R_BT.656


edge enhance
Edge enhancement is an image processing filter that enhances the edge contrast of an image or video in an attempt to improve its acutance (apparent sharpness).

The filter works by identifying sharp edge boundaries in the image, such as the edge between a subject and a background of a contrasting color, and increasing the image contrast in the area immediately around the edge. This has the effect of creating subtle bright and dark highlights on either side of any edges in the image, called overshoot and undershoot, leading the edge to look more defined when viewed from a typical viewing distance.



The chroma suppression module reduces faulty-color using luminance (Y) value or high-pass-filtering Y
value. The H-resizer and V-resizer modules resize horizontal and vertical image sizes, respectively.
http://www.ti.com/lit/ds/symlink/tms320dm355.pdf





A colour look-up table (CLUT) is a mechanism used to transform a range of input colours into another range of colours. It can be a hardware device built into an imaging system or a software function built into an image processing application. The hardware colour look-up table will convert the logical colour (pseudo-colour) numbers stored in each pixel of video memory into physical colours, normally represented as RGB triplets, that can be displayed on a computer monitor. The palette is simply a block of fast RAM which is addressed by the logical colour and whose output is split into the red, green, and blue levels which drive the actual display (e.g., a CRT or cathode ray tube).
http://en.wikipedia.org/wiki/Colour_look-up_table

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