Water gauge waterline visual detection method suitable for complex illumination conditions

A technology for lighting conditions and visual detection, which is applied to the level indicators of level members, image data processing, instruments, etc., can solve the problem of difficulty in ensuring detection accuracy, and achieves avoiding uneven gray distribution of images, high detection accuracy, and strong detection accuracy. The effect of robustness

Active Publication Date: 2019-05-17
安徽金海迪尔信息技术有限责任公司
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Problems solved by technology

[0006] Purpose of the invention: The purpose of the present invention is to provide a visual detection method for the water level line of the water gauge suitable for complex lighting conditions, which can solve the p

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  • Water gauge waterline visual detection method suitable for complex illumination conditions
  • Water gauge waterline visual detection method suitable for complex illumination conditions
  • Water gauge waterline visual detection method suitable for complex illumination conditions

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Embodiment Construction

[0051] The technical solution of the present invention will be further introduced below in conjunction with specific embodiments.

[0052] This specific embodiment discloses a visual detection method of water level line with a water gauge suitable for complex lighting conditions, such as figure 1 As shown, including the following steps:

[0053] S1: Use a single camera to acquire a water gauge image, and perform gray-scale processing on the image to obtain a gray-scale image;

[0054] S2: Use Canny operator to convert grayscale image into edge image;

[0055] S3: Calculate the gray average horizontal projection of the gray image and the gray average horizontal projection of the edge image respectively;

[0056] S4: Using the feature fusion method of coarse positioning of the water level line, calculate the gray image gray mean difference and the edge image gray mean difference of two adjacent coarse positioning ROI regions, using the period of the standard water rule image as the step, ...

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Abstract

The invention discloses a water gauge water level line visual detection method suitable for complex illumination conditions. By utilizing a difference between a water gauge image and a water surface image, a gray scale mean difference of a gray image and an edge image is calculated, the maximum value of the two features is taken as an index for measuring the image difference, then a water level line detection method combining coarse positioning and fine positioning is adopted, and high robustness is achieved for water gauge water level line detection under the complex lighting conditions. According to the water gauge water level line visual detection method suitable for the complex illumination conditions, detailed information of a water gauge is provided under the condition that the images are blurred, water level line detection is performed with a single pixel as a step during the fine positioning, and the detection precision can reach a single pixel. The water gauge water level linevisual detection method is suitable for the conditions of natural illumination (daytime) and infrared illumination (nighttime), and false detections due to uneven distribution of image gray scales caused by the natural illumination and nighttime fill light can be effectively avoided.

Description

Technical field [0001] The invention relates to a visual detection method for the water level of a water gauge, in particular to a visual detection method of the water level of a water gauge suitable for complex lighting conditions. Background technique [0002] Water level is one of the basic hydrological elements of rivers, lakes and reservoirs. Since the water supply in cities and irrigation areas, rainstorm and flood flow, runoff and sediment and nutrient transport rate and other information usually need to be obtained based on water level measurements, continuous and reliable water level monitoring It is of great significance to comprehensively improve the level of early warning and forecasting of flood control and drought resistance and the daily supervision of rivers and lakes. The water gauge records the height of the water level through readings. It is the most intuitive and simple measurement tool; however, the traditional water gauge measurement requires manual and reg...

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Application Information

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IPC IPC(8): G01F23/04G06T5/50G06T7/00G06T7/13G06T7/73
Inventor 张振周扬石爱业高红民沈洁陈哲李臣明王慧斌刘海韵
Owner 安徽金海迪尔信息技术有限责任公司
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