Stain detection and classification method and device for sensor of digital camera

A technology for stain detection and digital camera, applied in instruments, image analysis, image data processing, etc., can solve the problems of difficult to grasp the judgment scale, heavy workload and high cost, and achieve the effect of good effect, single background and high efficiency

Active Publication Date: 2015-08-26
BEIJING DAHENG IMAGE VISION +1
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AI Technical Summary

Problems solved by technology

However, the method of manual judgment is time-consuming, heavy workload, high cost, and difficult to grasp the scale of judgment

Method used

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  • Stain detection and classification method and device for sensor of digital camera
  • Stain detection and classification method and device for sensor of digital camera
  • Stain detection and classification method and device for sensor of digital camera

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Embodiment Construction

[0053] The required equipment conditions for the specific implementation of the present invention are: (1) a MER-Gx200 digital camera produced by Daheng Image, the physical parameters are: lens: Computar 16mm, 1:1.4, 2 / 3; camera model: MER-Gx200UC -L, camera CCD chip pixel size: 4.40um*4.40um, image resolution: 1628*1236; (2) A computer for stain detection and sensor classification processing, physical parameters: CPU: Core i7 920 2.66GHz , RAM: 8GB. (3) Light source, model NSPL-8-1-G, voltage 5V, power 1.75W; (4) Daheng image Galaxy View camera demonstration program.

[0054] as attached figure 1 Shown: 101 represents a computer; 102 is a power supply and a data cable connected to a camera; 103 is a camera bracket; 104 is a digital camera to be detected; 105 is a camera bracket, which is used to block the camera to prevent falling off; 106 is a light source; 107 is a Light source power supply;

[0055] figure 2 A model of camera imaging is shown. The specific implementa...

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Abstract

The invention discloses a stain detection method for a sensor of a digital camera, and a method and a device for classifying the sensor of the camera based on the detection method, wherein the method comprises the following steps: (1) inputting original image data and obtaining luminance component via interpolation, (2) low-pass filtering, (3) edge enhancement, (4) band-pass filtering, (5) image binaryzation operation and morphological dilation, (6) connectivity area abstraction, (7) marking stain in an original image, (8) classifying the sensor and outputting image level. The invention is divided as two function modules which are used for detecting the stain and classifying the sensor. A contiguous item of a classification decision function is from features such as quantity, area, and color depth of the stain detected in a shooting image. The method and the device of the invention is simple and efficient and can be used for fast detecting stain position on the sensor and carrying out accurate level evaluation to current sensor according to the feature of theses stains.

Description

technical field [0001] The invention relates to the field of instrument measurement and testing, in particular to a detection and classification method for camera sensors and a corresponding device. Background technique [0002] In the production of industrial cameras, it is necessary to classify the camera sensor according to the camera quality requirements of different users. For example, some users require no stains on the camera sensor surface; Stains in the area are acceptable; in addition, if there are darker and larger stains on the sensor surface, it needs to be returned to the factory for processing. [0003] Therefore, after the sensor leaves the factory, it needs to be tested to determine which requirements it meets. At present, the detection of sensor quality is mostly through manual sorting, which is judged one by one. However, the method of manual judgment is time-consuming, heavy workload, high cost, and difficult to grasp the judgment scale. [0004] There...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00
CPCG06T7/0004G06T2207/10052
Inventor 张谱赵祖轩路鹏马英新周中亚张策
Owner BEIJING DAHENG IMAGE VISION
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