A method and device for non-uniformity correction
A non-uniformity correction and equipment technology, applied in the field of image processing, can solve problems such as insufficient correction ability, failure, and insufficient matching accuracy
Active Publication Date: 2022-02-18
浙江华感科技有限公司
View PDF11 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0006] The present invention provides a method and equipment for non-uniformity correction, which are used to solve the problems in the prior art that the scene-based inter-frame matching algorithm has insufficient correction ability, fails when there is no relative displacement between frames, and has insufficient matching accuracy.
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
[0068] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments . Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0069] The following is an explanation of some words that appear in the text:
[0070] 1. The term "and / or" in the embodiment of the present invention describes the association relationship of associated objects, indicating that there may be three relationships, for example, A and / or B, which may mean: A exists alone, A and B exist simultaneously, and There are three cases of B. The character " / " generally indicates that the contextual ob...
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 non-uniformity correction method and device, which relate to the technical field of image processing and are used to solve the problems of insufficient correction capability of a scene-based inter-frame matching algorithm, failure when there is no relative displacement between frames, and insufficient matching accuracy. The method of the present invention includes: obtaining the relative displacement between frames by performing sub-pixel level cross-correlation registration on adjacent frame images; determining the direction of gradient descent according to whether the relative displacement is greater than a threshold; correcting the pixel parameters of the target image according to the direction of gradient descent Update, wherein the target image is located behind the previous frame image of the adjacent frame image; according to the updated pixel correction parameters, the target image is corrected for non-uniformity, because the present invention improves the matching accuracy through sub-pixel level mutual registration In addition, according to whether the relative displacement is greater than the threshold, the direction of gradient descent is determined, and the pixel correction parameters are updated to realize the non-uniformity correction of the target image when there is no relative displacement of the lens.
Description
technical field [0001] The invention relates to the technical field of image processing, in particular to a non-uniformity correction method and equipment. Background technique [0002] The non-uniformity of the infrared detector is the primary factor limiting its performance and application, and this non-uniformity appears as a fixed pattern noise superimposed on the image. [0003] The current non-uniformity correction methods are divided into two categories: one is the temperature calibration method, and the other is the scene-based adaptive correction algorithm. The calculation amount of the calibration method is small, and it is easy to implement in FPGA (Field-Programmable Gate Array, field-programmable gate array) or DSP (Digital Signal Processing, digital signal processing). Among them, the two-point calibration method plays a leading role in engineering. The disadvantage of the calibration method is that the parameters do not change with the environment, it needs ...
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 Patents(China)
IPC IPC(8): G06T7/70G06T7/80G06T5/00G06T7/30
CPCG06T7/70G06T7/80G06T7/30G06T2207/20036G06T5/70
Inventor 艾成汉程敏
Owner 浙江华感科技有限公司