Real-time bad image pixel detection method

A dead pixel, real-time detection technology, applied in the direction of image communication, TV, color TV parts, etc., can solve the problem of manpower and man-hours for detection and repair of dead pixels, failing to fully consider image attributes, and occupying storage media Space and other issues, to achieve the effect of improving fixed thresholds, misjudgment and neglect, manpower consumption and storage space

Inactive Publication Date: 2008-07-02
ALTEK CORP
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Problems solved by technology

[0008] The technical problem to be solved by the present invention is to provide a method for real-time detection of dead pixels in images, so as to solve the problem that the current digital camera must spend too much manpower and man-hours on the detection and repair of dead p

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Embodiment Construction

[0035] The method for real-time detection of dead pixels in images proposed by the present invention is mainly applied to the image processing of digital cameras. For the step-by-step process of the overall method, please refer to figure 2 The section is further explained as follows:

[0036] First, an external image must be acquired through the image sensing element (such as CCD or CMOS) of the digital camera (step 100), and each pixel in the acquired image will basically be arranged in an image matrix and temporarily stored in the digital camera. In the built-in storage medium (such as: flash memory), it is waiting for the subsequent real-time detection and processing procedure of image bad pixels.

[0037] At this time, the present invention will sequentially select the pixel to be tested and its surrounding adjacent pixel groups according to the arrangement order of each pixel in the image matrix to perform dead pixel detection (step 110 ). It should be noted here that t...

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Abstract

The invention discloses a method for real-time detecting image dead dot pixel, which is applied in a digital camera to real-time detect dead dot pixel existing in images so as to find out pixels which need restoring when the digital camera acquires images. Through real-time detection, the labor power and labor hour which are spent on the dead spot correction program in the production of digital cameras are decreased, and also the storage space used for storing dead dot pixel information for a digital camera is decreased; more importantly, in the process of detection, dead pot pixel can be judged according to different attributes of images thus dynamically adjusting threshold value; therefore, that what happens to the dead pot pixel can be more accurately mastered thus reaching the effect of improving the quality of images.

Description

technical field [0001] The invention relates to a method for detecting dead pixels in an image, which is applied to image processing of a digital camera, and particularly relates to a method for real-time judgment of dead pixels in an image by using a dynamic threshold. Background technique [0002] At present, in the production process of digital cameras, there will be a so-called [dead pixel correction program], that is, to detect and correct dead pixels for images obtained by image sensing elements (such as: CCD or CMOS) of digital cameras. The judging logic of dot pixels finds out the positions of possible bad pixels in the image sensing element, and records them in the storage medium of the digital camera, so that when the digital camera shoots images, other image processing in the digital camera can The program corrects (or repairs) the bad pixels in the image according to the recorded information, thereby improving the overall image quality. [0003] This prior art b...

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Application Information

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IPC IPC(8): H04N17/00H04N5/335
Inventor 詹振宏
Owner ALTEK CORP
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