Non-linear geometrical changes in the leaf area scanner lens imaging system can cause measurement errors. When using a leaf area scanner, nonlinear geometrical changes are negligible. Video image capture cards and the use of camera image acquisition equipment and the use of inexpensive wide-angle lenses, this error will be the main source of error. This is because the camera in the instrument can be adjusted in the laboratory to more closely superimpose the CCD plane and the image plane. The offset error caused by the linear geometric distortion of the CCD plane and the image plane is relatively small. The correction of non-linear geometric variations of the distortion parameters measured by the leaf area scanner can be achieved, thereby improving the accuracy of the measurement.
This error also exists when using a digital camera, but it is not the main source of error, and because the leaf area scanner shooting conditions are not fixed, it is difficult to use the non-linear geometric distortion correction method to eliminate the effect of the literature. One feasible method is to move the image digital camera away from the leaf area scanner to measure the blade area as much as possible by measuring the zoom function of the camera blade image as large as possible, which is equivalent to reducing the error at the longest possible focal length. This is a more effective method at present.
Deviations between the image plane and the CCD surface will inevitably lead to geometrical changes in the linear image, resulting in measurement errors in the leaf area scanner. This is the main source of error in using the camera's sake. The advantage of using a digital camera is that the organizational structure does not destroy the leaves, and the rules for truly detecting the area of ​​leaf growth are not dependent on statistical rules.
This error also exists when using a digital camera, but it is not the main source of error, and because the leaf area scanner shooting conditions are not fixed, it is difficult to use the non-linear geometric distortion correction method to eliminate the effect of the literature. One feasible method is to move the image digital camera away from the leaf area scanner to measure the blade area as much as possible by measuring the zoom function of the camera blade image as large as possible, which is equivalent to reducing the error at the longest possible focal length. This is a more effective method at present.
Deviations between the image plane and the CCD surface will inevitably lead to geometrical changes in the linear image, resulting in measurement errors in the leaf area scanner. This is the main source of error in using the camera's sake. The advantage of using a digital camera is that the organizational structure does not destroy the leaves, and the rules for truly detecting the area of ​​leaf growth are not dependent on statistical rules.
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