Automatic exposure control method and system

A technology of automatic exposure and control method, applied in the parts of TV system, TV, color TV and other directions, can solve the problem of difficult control of exposure radiation field, and achieve accurate selection of exposure radiation field and avoidance of The effect of line delay and precise exposure control

Active Publication Date: 2021-04-16
SHANGHAI IRAY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide an automatic exposure control method and system for solving the problem that the exposure radiation field is difficult to control in the prior art

Method used

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  • Automatic exposure control method and system
  • Automatic exposure control method and system
  • Automatic exposure control method and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] like figure 1 As shown, this embodiment provides an automatic exposure control method, and the automatic exposure control method includes:

[0049]1) The object to be photographed enters the photographing area, the image of the object to be photographed is collected, and the position information of the part to be photographed is obtained.

[0050] Specifically, the flat panel detector is first placed in the detection system and electrically connected with other devices in the detection system, the detection system includes but is not limited to DR (Digital Radiography, direct digital X-ray), CT (computed tomography, electronic Computed tomography) and security inspection machines, and any system that uses a flat-panel detector for image acquisition is applicable. Then turn on the flat panel detector and turn it on to warm up.

[0051] Specifically, in this embodiment, a visual device is used to capture the image of the object to be photographed. The photography method...

Embodiment 2

[0065] like figure 2 As shown, this embodiment provides an automatic exposure control method, which is different from Embodiment 1 in that the automatic exposure control method detects exposure by scanning the exposure dose in the exposure radiation field area of ​​the flat panel detector. Start time and end time, including the following steps:

[0066] 1) The object to be photographed enters the photographing area, the image of the object to be photographed is collected, and the position information of the part to be photographed is obtained.

[0067] For the specific method, refer to Embodiment 1, which will not be repeated here.

[0068] 2) Determine the exposure radiation field of the flat panel detector based on the relative position of the object to be photographed and the flat panel detector.

[0069] For the specific method, refer to Embodiment 1, which will not be repeated here.

[0070] 3) Selecting the exposure radiation field of the flat panel detector, exposin...

Embodiment 3

[0078] This embodiment provides an automatic exposure control method, which is different from Embodiments 1 and 2 in that the automatic exposure control method further acquires the shape information of the part to be photographed based on the image of the object to be photographed, and measures the shape information of the part to be photographed. The thickness information of the to-be-photographed part determines the exposure dose threshold according to the shape information and thickness information of the to-be-photographed part, including the following steps:

[0079] 1) The object to be photographed enters the photographing area, the image of the object to be photographed is collected to obtain the position information and shape information of the to-be-photographed part, and the thickness information of the to-be-photographed part is measured by measuring the to-be-photographed part.

[0080] Specifically, first connect the flat panel detector to the system, and start up ...

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Abstract

The invention provides an automatic exposure control method and system, and the method comprises the steps: enabling a to-be-photographed object to enter a photographing region, carrying out the graphic collection of the to-be-photographed object, and obtaining the position information of a to-be-photographed part; determining an exposure radiation field of the flat panel detector based on the relative position of the to-be-photographed object and the flat panel detector; and selecting an exposure irradiation radiation field of the flat panel detector, exposing the to-be-photographed part, and triggering image acquisition by the flat panel detector after exposure is completed. According to the invention, the visual device is used for collecting information, the irradiation radiation field selection range is obtained through calculation and analysis, the subjective influence of operators is reduced, and the exposure irradiation radiation field selection is more accurate; automatic exposure control is realized based on exposure dose detection of an exposure irradiation radiation field area, the structure is simple, and the cost is low; the exposure dose is predicted through an algorithm, so that exposure dose errors can be effectively avoided, accurate exposure control is realized, and the imaging quality is improved; and an image is automatically acquired immediately after exposure is detected, so that the image acquisition period is shortened.

Description

technical field [0001] The invention relates to the field of flat panel detection, in particular to an automatic exposure control method and system. Background technique [0002] Flat panel detector is a new type of X-ray image detection technology that was born in the last century. It is famous for its fast imaging speed and high resolution. It is widely used in medical detection, non-destructive testing, security inspection, anti-terrorism and other fields. In the application of industrial inspection, the traditional film records the exposure radiation image, which is expensive and difficult to save. The application of digital flat panel detectors in industrial inspection has become the future development direction. [0003] Before exposure, it is first necessary to set the exposure radiation field. The number and position of the exposure radiation field are fixed in the traditional automatic exposure control. Wild matching is very inconvenient in actual operation. In re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/235
Inventor 黄翌敏何承林
Owner SHANGHAI IRAY TECH
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