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Method for forming image without time resolution limit based on light machine scanning signal

A scanning imaging and scanning signal technology, applied in image communication, TV system scanning details, TV, etc., can solve the problems of inconsistent acquisition time of different pixels, simultaneous information doping, and limited acquisition frequency, etc., to overcome the inconsistency of acquisition time , the effect of improving temporal and spatial resolution

Inactive Publication Date: 2005-03-02
CAPITAL NORMAL UNIVERSITY +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the flaws in the principle of the optical-mechanical scanning imaging system, there are two major problems in the image data it collects: 1. The collection frequency is limited; 2. The collection time of different pixels on the same frame is inconsistent
In particular, the second problem brings greater difficulties to the processing of data collected by the optical-mechanical scanning imaging system, especially for the situation where information from different feature regions is doped at the same time

Method used

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  • Method for forming image without time resolution limit based on light machine scanning signal
  • Method for forming image without time resolution limit based on light machine scanning signal
  • Method for forming image without time resolution limit based on light machine scanning signal

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Embodiment 1

[0045]Use the optical-mechanical scanning thermal imager to read the information of the detection target one by one to obtain its image signal. Any frame of the image signal includes the temperature values ​​of all pixels and the corresponding acquisition time. The image signal is stored in a known memory by frame. Then the display unit of the optical-mechanical scanning imaging system converts the image signal in the known memory into an image, and the image signal needs to be sequentially processed according to the following steps before being sent to the imaging system for display:

[0046] refer to figure 1 ,

[0047] (1) Read in the temperature values ​​of all pixels on a certain frame and their corresponding acquisition time;

[0048] (2) Use the general small-window weighted smoothing filter method to denoise the image signal of the detection target. The specific method is to replace the value of the center pixel point of the template with the average value in the temp...

Embodiment 2

[0058] According to the method of Example 1, when using an optical machine scanning thermal imager to perform infrared thermal wave nondestructive testing on samples with weak thermal diffusion capabilities such as composite materials, organic materials, and glass fiber reinforced plastics, the thermal change is not too fast, but due to the comparison of acquisition time As time goes on, the impact of thermal diffusion on the collected data is gradually expanding. During processing, d m Generally, the value of can be set slightly larger, and the image collected by the opto-mechanical scanning imaging system can be generated into an image without time resolution limitation.

Embodiment 3

[0060] In the infrared thermal wave nondestructive testing of metal samples, the thermal wave changes very quickly, and the thermal change process is basically concentrated in a certain frame or two frames of the optical-mechanical scanning image. Directly observing the collected thermal wave images, it is completely impossible to distinguish different regions. position and size. By performing the first correlation fitting analysis on the pixels, the thermal process can be basically separated from the thermal equilibrium state, and then the second fitting analysis can be performed to distinguish different characteristic regions. During processing, d m Generally, the value of can be set to be small, because the heat diffusion ability of the metal is extremely strong, and different regions affect each other, which will make the difference between different regions become very inconspicuous. If d m The value of is large, and it is impossible to separate them at all. Of course, d...

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Abstract

This invention relates to a method for generating picture signals acquired by an optical computer scan imaging system to a without limitation of time resolution and no time difference among picture elements characterizing in utilizing the correlation of each point time and number in the optical computer scan image frames to process the noise reduction and fit the time to find an optimum parameter vector and divides all picture elements into different regions based on the character by judging distance between each picture element value and fit curves then to iterate and fit them many times so as to find out different regions corresponding fit parameter vectors.

Description

technical field [0001] The invention relates to a method for generating an image without time resolution limitation from image signals collected by an optical-mechanical scanning imaging system, which is an improvement on the traditional optical-mechanical scanning imaging system. Background technique [0002] The optical-mechanical scanning imaging system is a relatively old data acquisition and imaging system, which is characterized by reading the information on the target one by one to obtain the image signal of the target, and storing it in the memory, and then transmitting the image signal in the memory to the system displayed on the display unit. According to the shape of the scanning field of view of the optical-mechanical scanning imaging system and the arrangement of the detectors, there can be a variety of scanning trajectories: line scanning, TV scanning and petal scanning, etc., but no matter which scanning method is adopted, the collected data points are This r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N3/02
Inventor 王迅陈继华张存林金万平沈京玲
Owner CAPITAL NORMAL UNIVERSITY