Multi-band flat field correction method and device and computer readable medium
A flat-field correction and band technology, applied in the field of image processing, can solve the problems that the image pixel response cannot be effectively adjusted, and the correction coefficient is not considered.
Active Publication Date: 2021-08-17
ゼジャンハーレイテクノロジーカンパニーリミテッド
View PDF3 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] The traditional flat-field correction algorithm is mainly corrected by multiplication. The correction formula is Y=X*k, where Y is the output gray value after correction, X is the original output gray value of the image sensor, and each pixel in the image corresponds to A correction coefficient K; however, this correction coefficient does not consider the influence of the band in the light source on the response of the pixel, so the traditional flat-field correction algorithm is only suitable for the correction of image pixels in the same light source band environment, for image images in different light source band environments meta-responses cannot implement valid adjustments
Method used
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
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0025] Exemplary embodiments of the present invention are described below in conjunction with the accompanying drawings, which include various details of the embodiments of the present invention to facilitate understanding, and they should be regarded as exemplary only. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the invention. Also, descriptions of well-known functions and constructions are omitted in the following description for clarity and conciseness.
[0026] Such as figure 1 As shown, a schematic flowchart of a multi-band flat-field correction method according to an embodiment of the present invention. A multi-band flat-field correction method, the specific operation process is as follows: S101, separately obtain the gray value corresponding to the first gray image of the monochromatic area collected by the image senso...
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 PUM
Login to View More Abstract
The invention discloses a multi-band flat field correction method and device and a computer readable medium, and belongs to the technical field of image processing. The method comprises the following steps: determining a flat field gray value of a target area under a natural light source based on gray weights corresponding to three wavebands of the target area under the natural light source environment and three gray values of the target area collected under the three-waveband light source environment; then, for any pixel in the target area, determining a gray correction coefficient of the pixel based on the position information and the size information of the target area, the position information of the pixel and a flat field gray value of the target area; and correcting the gray value of the pixel by using the gray correction coefficient to obtain a pixel flat field gray value. Therefore, all the pixels in the target area can have the same gray response value, and the problem that in the prior art, response of the image sensor to the pixels is inconsistent due to change of the light source wave band is solved.
Description
technical field [0001] The present invention relates to the technical field of image processing, in particular to a multi-band flat-field correction method, device and computer-readable medium. Background technique [0002] In the process of image acquisition by the image sensor, due to the image sensor's response to the light source band, color crosstalk, process, and design, there will be inconsistencies in the response of each pixel in the grayscale image. In the image generated after the image sensor captures a uniform object, there are inconsistencies in the gray values of multiple pixels, such as vertical stripes, horizontal stripes, and regional gray inconsistencies. However, in the field of industrial vision such as intelligent manufacturing, the inconsistent gray value of multiple pixels in the same image will seriously affect the accuracy of the calculation results. For this reason, in applications such as high-end industrial cameras that require fine detection ...
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 Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/202
CPCH04N5/202
Inventor 王宗苗史为平吕焱飞
Owner ゼジャンハーレイテクノロジーカンパニーリミテッド