Two-way mass center tracking imaging method and device

An imaging method and centroid technology, which are applied in measurement devices, optical devices, image analysis, etc., can solve problems such as the inability to meet the requirements for the use of larger area array image sensors, improve data parallel processing capabilities, improve data processing speed, Wide range of effects

Active Publication Date: 2009-02-11
BEIHANG UNIV
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Problems solved by technology

[0005] However, as larger area image sensors that can improve the accuracy of instruments and equipment, such as image sensors with 2048×2048 pixels, are widely used in instruments and equipment, the amount of image data output by these image sensors will increase linearly. In order to ensure a high frame rate, the pixel frequency of the image sensor output data will also increase accordingly, which puts forward higher requirements for the processing speed and processing capacity of the spot image. The current centroid following imaging technology can no longer meet the needs of larger area arrays. Image sensor usage requirements

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  • Two-way mass center tracking imaging method and device

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[0052] The basic idea of ​​the present invention is: when processing the entire spot image, read in the gray values ​​of the current two channels of pixels at the same time, and compare the gray values ​​of the two channels of pixels with the preset threshold at the same time. When one is greater than the threshold, the process of two-way data marking, two-way data merging, and two-way data accumulation is performed until the entire spot image is processed, and the obtained spot image centroid coordinate value is output.

[0053] Here, the two channels of pixels read in at the same time are called left pixel and right pixel respectively, and the data marking is to mark the left pixel and the right pixel respectively according to the result of comparing the left pixel and the right pixel with the threshold respectively; Data merging is based on whether the left pixel and the right pixel are greater than the threshold, and determines whether to accumulate the storage data corresp...

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Abstract

The invention discloses a dual-line center-of-mass following imaging method. When in treatment of a whole spot image, gray values of the current two lines of pixels are simultaneously read at each time, the gray values of the two lines of the pixels are simultaneously compared with a preset threshold, when at least one of the two lines of the pixels is larger than the threshold, the dual-line data labeling, the dual-line data merging and the dual-line data accumulation processes are implemented till the completion of the treatment of the whole spot image, and the obtained coordinates of the center-of-mass of the spot image are output. The invention further simultaneously discloses a dual-line center-of-mass following imaging device, and the use of the method and the device can improve the parallel treatment ability of data and the treatment speed of the data.

Description

technical field [0001] The invention relates to spot image processing technology, in particular to a two-way centroid-following imaging method and device. Background technique [0002] The spot image is common image information in machine vision and pattern recognition, which is collected by an image sensor, and the spot centroid is the feature of the spot image. Spot centroid is widely used in target tracking in machine vision, feature point extraction in high-precision three-dimensional measurement in visual inspection, positioning of laser spot center in deep-space laser communication for space applications, star point positioning of star sensors in attitude measurement components, Sun spot positioning for sun sensors. [0003] In the prior art, generally two types of methods can be used to locate the centroid of the light spot: a grayscale-based positioning method and an edge-based positioning method. Among them, the grayscale-based positioning method generally uses th...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/00G06T7/60
Inventor 江洁张广军崔运东樊巧云魏新国
Owner BEIHANG UNIV
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