A Method of Relative Radiation Correction for CCD Image

A relative radiometric correction, image technology, applied in the field of remote sensing, can solve the problems of affecting the splicing effect, the difficulty of absolute radiometric correction, chromatic aberration, etc., to achieve the effect of ensuring the DN value level, eliminating the chromatic aberration phenomenon, and improving the quality
CN104580944BActive Publication Date: 2017-11-17ACAD OF OPTO ELECTRONICS CHINESE ACAD OF SCI
6 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ACAD OF OPTO ELECTRONICS CHINESE ACAD OF SCI
Publication Date
2017-11-17

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention provides a method for performing relative radiation correction on CCD images, performing relative radiation correction on the original image obtained by push-brooming of a one-dimensional CCD camera, including: step A, using the integrating sphere method to test the detection units of the one-dimensional CCD camera The radiation calibration data under different integrating sphere output radiance Lj and different integration time Tk step B, the radiation calibration data of each detection unit of the one-dimensional CCD camera under different energy levels Lj and different integration time Tk are used for the improved relative radiation correction Model, calculating the relative radiation correction coefficient of each detection unit; and step C, for each pixel in the original image, using the relative radiation correction coefficient of the detection unit corresponding to the pixel to perform radiation intensity correction, and then obtaining a relative radiation corrected image. The invention avoids the problem of obvious color difference in spliced ​​images inside the same flight zone and adjacent flight belts due to the difference in integration time when processing the aviation linear array CCD image.
Need to check novelty before this filing date? Find Prior Art

Description

Technical field

[0001] The present invention relates to the field of remote sensing technology, in particular to a method for performing relative radiation correction on CCD images. Background technique

[0002] One of the core components of the aviation optical linear array load is the CCD (Charge-coupled Device) array, which contains many detection units. Due to the limitation of the manufacturing process, the parameters of each detection unit cannot be guaranteed to be consistent, resulting in certain differences in the response characteristics of each detection unit of the CCD array. For the push-broom sensor, the remote sensing image is pushed and scanned by the linear CCD array. Due to the difference in the response characteristics of the detection units of the CCD array, the final image will have uneven brightness in the entire field of view, or even Exhibits band noise.

[0003] The radiation correction of optical remote sensing images includes relative radiation correcti...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More