Smear effect processing method of CCD (Charge-Coupled Device) sensor

A processing method and sensor technology, applied in image data processing, instrumentation, computing, etc., can solve the problem of low ability to eliminate Smear effect

Inactive Publication Date: 2010-10-06
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

[0004] In order to overcome the low deficiency of existing Smear effect correction method Smear eff

Method used

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  • Smear effect processing method of CCD (Charge-Coupled Device) sensor
  • Smear effect processing method of CCD (Charge-Coupled Device) sensor
  • Smear effect processing method of CCD (Charge-Coupled Device) sensor

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Embodiment Construction

[0047] 1. The location where the Smear effect occurs is determined.

[0048] For a 16-bit image with a size of r×c, the gray value range of a single pixel is (0, 65535), according to the formula (1), the gray value of each column in the image is accumulated and summed, where r Represents the row length, c represents the column width, Col_sum(j) represents the grayscale sum of the jth column, f i，j (x, y) represents the gray value at (i, j), and the gray value and value vector Col_sum of each column of the global image can be obtained by calculation.

[0049] Col _ sum ( j ) = Σ i = 1 r f i , j ( x , y ) , i ∈ [ 1 , r ...

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Abstract

The invention discloses a Smear effect processing method of a CCD (Charge-Coupled Device) sensor, which aims to solve the technical problem of low Smear effect eliminating capability of a traditional Smear effect correcting method. The invention adopts the technical scheme that the concrete position information of a Smear effect generation region is judged by utilizing the statistic information of global image gray to eliminate the dependency on carrying out Smear effect correction by known relevant parameters of a camera. In consideration of the generated relation of a Smear effect image and an original image, background modeling is carried out on the original image and a Smear effect region according to the original image and the gray characteristics of generating the Smear effect region, the Smear effect image is estimated, and the influence of factors such as illumination, noise and the like on the image is considered by means of the image characteristics of the original image. The invention more truly reflects the image characteristics of generating a Smear image current frame and improves the Smear effect eliminating capability.

Description

technical field [0001] The invention relates to a Smear effect processing method, in particular to a CCD sensor Smear effect processing method. Background technique [0002] Smear effect (smear problem) is an inherent characteristic of frame transfer type CCD sensors. When the CCD sensor is irradiated by a strong light source, during the frame transfer process, the vertical CCD continuously performs photoelectric conversion, and the signal charge in the photographing area is transferred to the storage area. During the transfer, the signal charge will add the redundant photoelectric conversion signal generated by the strong light source. White lines drawn up and down in the read-out image will seriously affect the image contrast and image quality, and reduce the image detail information. The existing Smear effect correction methods use methods such as increasing the exposure time, using mechanical shutters and electronic shutters, and using dark pixel area information or cam...

Claims

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Application Information

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IPC IPC(8): G06T5/50
Inventor 周军孙瑾秋
Owner NORTHWESTERN POLYTECHNICAL UNIV
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