Data interpolation method for BAYER format image

Abstract

The invention discloses a data interpolation method for a BAYER format image. The method comprises the following steps: 1, selecting a pixel point (i, j) which lacks G value data in the BAYER format image to perform G value filling: (1) selecting a n*n calculation region by taking the pixel point (i, j) as the center; (2) counting the horizontal gradient values and vertical gradient values of all pixel points in a region selected in the step (1) to obtain a horizontal gradient total value SUM-H and a vertical gradient total value SUM-V; (3) comparing the horizontal gradient total value SUM-H with the vertical gradient total value SUM-V, and performing G value filling on the pixel point (i, j); 2, after finishing step 1, filling the pixel points lacking at least one type of data in R, G and B in the BAYER format image. The operand of the method is much smaller than that of the conventional CFA (Color Filter Array) algorithm, a small number of memory resources are occupied during operation, and the method is easy to implement in a FPGA (Field Programmable Gata Array) and a DSP (Digital Signal Processor).

Description

technical field [0001] The invention relates to the technical field of data and image processing, in particular to a method for interpolating image data in BAYER format. Background technique [0002] As digital cameras, scanners and other computer input devices become more and more popular, CCD and CMOS sensors, as the most important components in image systems, are gradually becoming known to people. In order to get the most detailed description of the original image, three groups of CCD sensors are generally required. However, when the current CFA algorithm processes BAYER data, if the output effect is guaranteed to be good, it must use a large amount of data processing, which greatly increases the cost of manufacturing the camera. Generally, the color filter array is covered on the digital camera image sensor, because the Bayer format color filter array has good color signal sensitivity and color restoration characteristics, and each sensitive point only allows one color...

AI Technical Summary

Problems solved by technology

However, the algorithm calculates the ratio of the two gradient groups to compare with the set threshold, which requires a large amount of calculation.

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