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Color demosaicing system and method

A color and interpolation unit technology, applied in image signal generators, etc., can solve the problems of low sharpness, distorted images, low sampling rate of red data and blue data in the imaging system, etc.

Active Publication Date: 2014-11-05
HIMAX IMAGING LIMITED
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Problems solved by technology

One of the disadvantages of traditional imaging systems is that the sampling rate of red data and blue data is much lower than that of green, which makes the imaging system produce low-sharp and distorted images

Method used

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  • Color demosaicing system and method
  • Color demosaicing system and method
  • Color demosaicing system and method

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Embodiment Construction

[0014] Figure 1A A block diagram of a color interpolation system 1A of an embodiment of the present invention is shown. Implementation of each block of color interpolation system 1A may use hardware, software, or a combination thereof.

[0015] In this embodiment, the color interpolation system 1A receives a raw green signal G_raw, a raw red signal R_raw and a raw blue signal B_raw. These signals are in raw format and are output from an image sensor (not shown in the figure) which incorporates a color filter array (CFA) with a Bayer pattern, although other patterns such as red / Green / Blue (RGB) pattern or Cyan / Magenta / Yellow (CMY) pattern. A color filter array with a Bayer pattern has multiple color filters, 50% of which are green, 25% are red, and the other 25% are blue. Generally, in a Bayer pattern or other patterns, there are more green components than red or blue components. In this specification, the green signal, the red signal and the blue signal may also be referr...

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Abstract

Disclosed are a color demosaicing system and a method. An enhancement unit receives a plurality of original signals from an image sensor and processes the original signals to output a first enhancement signal; a first demosaicing unit receives and processes a first original signal, and outputs a first demosaicing signal; and a gain generator generates enhancement gain according to the first enhancement signal and the first demosaicing signal.

Description

technical field [0001] The invention relates to a digital image processing method, in particular to a color interpolation system and method. Background technique [0002] Image sensors typically incorporate a color filter array (CFA) with a Bayer pattern, so the raw image data captured from the image sensor must be interpolated (demosaicing) to reconstruct a full color image . [0003] Image enhancement (image enhancement) is often used in digital image processing to enhance one or more image parameters, such as contrast, sharpness, and the like. Image enhancement can be performed based on edge detection results or gradients. [0004] In a traditional imaging system, raw image data captured from an image sensor is firstly interpolated and then image enhanced. One of the disadvantages of traditional imaging systems is that the sampling rate of red data and blue data is much lower than that of green, making the imaging system produce low-sharp and distorted images. [0005...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N9/04
Inventor 陈柏璋彭源智宋尤昱
Owner HIMAX IMAGING LIMITED
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