Light spot centroid positioning method based on block threshold
A centroid positioning and light spot technology, applied in image analysis, image data processing, instruments, etc., can solve the problems of poor anti-noise performance and low centroid positioning accuracy, and achieve the effect of accurate and effective range
Pending Publication Date: 2021-12-17
XIAN UNIV OF TECH
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[0004] The purpose of the present invention is to provide a spot centroid positioning method based on block threshold, which solves the problem of low positioning accuracy and poor anti-noise performance of the adaptive threshold method in the prior art
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[0031] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
[0032] The present invention is based on a graphic threshold of a split threshold, which is implemented in accordance with the following steps:
[0033] Step 1, obtain a spot grayscale image, divide the spot grayscale image into several small pieces, each small piece consisting of 3 × 3 pixels to obtain a number of collections;
[0034] Step 1 is specifically as follows:
[0035] The Gauss spot standard grayscale image I (i, j), i, j) represents a grayscale image of the pixel point coordinates (i, j), divided by the formula (1) into a number 3 × 3 The pixel blocks TEMP (X, Y), TEMP (X, Y) of the pixel composition set, represent the gradation value of the pixel block of the coordinates (x, y), specific division mode visible figure 1 ,like figure 1 As shown, TEMP (1, 1) is obtained from 9 pixel points,
[0036] Temp (1, 1) = I (1, 1) + I (1, 2) + i (...
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The invention aims to provide a light spot centroid positioning method based on a block threshold, which comprises the following steps: firstly, obtaining a light spot gray scale image, dividing the light spot gray scale image into a plurality of small blocks, and obtaining a plurality of sets, each small block being composed of 3 * 3 pixels; using the sum of the gray values of the divided small blocks as a basic unit, and solving the threshold value V of the divided small blocks by adopting an adaptive threshold value method; when the sum of the gray values of the small blocks is smaller than a threshold value V, setting the gray values of all the pixel points in the whole small blocks to be 0, and when the sum of the gray values in the small blocks is larger than or equal to the threshold value V, setting the gray values of all the pixel points in the small blocks to be the average value of all the pixel points in the current block; and finally, solving the center position coordinate of the light spot in the image by a centroid method. The problems of low positioning precision and poor anti-noise performance of a self-adaptive threshold value method for a centroid method in the prior art are solved.
Description
Technical field [0001] The present invention belongs to the field of image analysis processing, and in particular, the present invention relates to a graphic method based on a block threshold. Background technique [0002] Image threshold split is the difference between the target and the background of the object to be extracted in the image, divided by setting the image grayscale threshold to a plurality of classes, thereby achieving the target and background separation. The center positioning of the spot is a key technique in laser communication, a reasonable threshold segmentation method, which can effectively reduce the background noise of the image, reducing the amount of operation while increasing the positioning accuracy. In particular, in the spot image positioning, it is necessary to effectively filter out the background noise while retaining the effective gradation value of the spot. [0003] The common threshold segmentation method has five categories, which are based ...
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IPC IPC(8): G06T7/66G06T7/11G06T7/136
CPCG06T7/66G06T7/11G06T7/136G06T2207/10004
Inventor 吴鹏飞雷思琛王祎豪党帅
Owner XIAN UNIV OF TECH