Vision-based measuring method for cutting width of intelligent rice and wheat harvester

Abstract

The invention discloses a vision-based cutting width measurement method of an intelligent rice and wheat harvester, which comprises the following steps: according to an internal and external parametermatrix obtained by camera calibration, the world coordinate system is matched with a pixel plane coordinate system of a camera image, and an original rice and wheat image obtained by the camera is converted into a top view by using an inverse perspective projection; obtaining the actual target distance from the harvesting boundary line to the separator, obtaining the pixel width of the target area in the top view and determining the target area image by combining the reduction factor; Image preprocessing operation; the harvesting boundary line between harvested rice and wheat and unharvestedrice and wheat was extracted based on morphology, and the binary image of the target region containing the harvesting boundary line was obtained. Using probabilistic HOUGH transform method to detect the harvesting boundary line in the image and obtain coordinate parameters, the pixel distance from the harvester to the harvesting boundary line in the image can be obtained, and the actual cutting amplitude of the harvester can be calculated. The invention improves the reliability and can safely measure the cutting width of the intelligent rice and wheat harvester with high precision in real time.

Description

technical field [0001] The invention relates to a vision-based method for measuring the cutting width of an intelligent rice and wheat harvester, and belongs to the technical field of agricultural machinery automation. Background technique [0002] At present, "precision agriculture" has become the development direction of the agricultural field, and accurate acquisition of crop yields has become an indispensable part. The production measurement system of the intelligent rice and wheat harvester needs to calculate the harvested area in real time according to the operating speed of the agricultural machinery and the harvesting range. Nowadays, the intelligent rice and wheat harvesters at home and abroad mainly rely on manual input of the harvesting width, but the actual harvesting process The harvesting width in the field is constantly changing, and it is difficult to ensure a full harvest. In addition, with the development of intelligent rice and wheat harvesters towards hi...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, provide a vision-based intelligent rice and wheat harvester cutting width measurement method, and solve the problem of being susceptible to non-target objects in the traditional intelligent rice and wheat harvester cutting width measurement method. Interference, resulting in poor reliability and low accuracy

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