On-line Instrumentation of Agricultural Crops by Pattern Processing

Abstract

Acomputer controlled on-line pattern instrumentation system was developed and automatic meauremets of sizes, areas, edges and shape parameter findings concerning an orange and a spinage leaf were mabe. Input pattern was taken from visicon ITV camera with the total picture element of 13056 consisted from vertical 102 lines and horizontal 128 elements.
The object extraction from the background was made by the threshold value determind from the histogram for brightness feature or four levels of a constant gray scale interval. The edge of the object was extracted from a kind of spatial differentiation in respect to the extracted objective region.
The contrast of the object to the background is the most fundamental factor when the automatic measurement of thess parametes is performed by the pattern processing techniques. Area measurement by counting the picture element belonging to the objective region seems to be made within a few percent of error.
This instrumentation system has the merit of non-touching and non-destructive operation and high throughput rate of up to 3c/s is obtainable.