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Linear array scan image non-uniform correction method based on statistical restraint model

A non-uniformity correction, statistical constraint technology, applied in image communication, TV system components, electromagnetic wave re-radiation and other directions, can solve the problem of image quality degradation, affecting the application of visual effects, etc., to achieve the effect of increasing design complexity

Inactive Publication Date: 2006-09-20
SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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Problems solved by technology

[0002] The push broom scanning imaging system is currently unavoidably affected by the spatial non-uniformity of the linear CCD detector unit. This non-uniform form degrades the quality of the obtained image and affects the visual effect or subsequent applications.

Method used

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  • Linear array scan image non-uniform correction method based on statistical restraint model
  • Linear array scan image non-uniform correction method based on statistical restraint model
  • Linear array scan image non-uniform correction method based on statistical restraint model

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Embodiment Construction

[0024] Combine below Figure 1 to Figure 3-6 The embodiments of the present invention are given and described in detail in order to better illustrate the features and functions of the method and to make it easier to understand the present invention, rather than to limit the scope of the present invention.

[0025] Please see first figure 1 ,as the picture shows, figure 1 It is a block diagram of the correction algorithm module for the non-uniformity of the continuous statistical constraint model set in the airborne push-broom digital imaging system. The function description of each module is as follows:

[0026] The initial correction parameter model module M1, through the initial correction parameter model obtained by radiometric calibration or a large number of image statistics;

[0027] The non-uniformity correction module M2 performs non-uniformity image statistics on the target image data D2, outputs scene-based non-uniformity correction parameters, and corrects the ima...

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Abstract

The invention relates to a linear scan image heterogeneity correction method based on continuous statistics constraint module that is used to scan image. It includes the following steps: gaining initial image correction parameter, taking heterogeneity correction and output the corrected image, gaining the new correction parameter; taking correction to the new corrected parameter and the original corrected parameter with the original correcting parameter module; repeating the step b-d until achieving the preset request. The invention could also be used in gray image.

Description

Technical field: [0001] The invention relates to a method for correcting non-uniformity of a line scan image, in particular to a method for correcting image non-uniformity of an airborne push-broom digital imaging system based on a statistical constraint model. Background technique: [0002] The pushbroom scanning imaging system is currently unavoidably affected by the spatial non-uniformity of the linear CCD detector unit. This non-uniform form degrades the quality of the obtained image and affects the visual effect or subsequent applications. The task of the non-uniformity correction (NUC) algorithm is to compensate the spatial non-uniformity and improve the image quality. Non-uniformity correction techniques can be divided into two categories, calibration-based and scene-based correction techniques. Calibration methods are necessary in applications that require accurate temperature measurements. However, in many practical applications, very accurate results are not requ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S17/89G01S7/497H04N5/14
Inventor 舒嵘孙凡马艳华
Owner SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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