초록 ▼

An image processing apparatus can improve positional accuracy by effecting median filtering processing while ensuring real-time operations by reducing the amount of data processing by software. In this image processing apparatus, when a counter has counted up to a predetermined number, or when the c

An image processing apparatus can improve positional accuracy by effecting median filtering processing while ensuring real-time operations by reducing the amount of data processing by software. In this image processing apparatus, when a counter has counted up to a predetermined number, or when the counter's value is increased by a predetermined number after the counter has counted up to the predetermined number, a filter circuit control section activates a filter circuit. As a result, the filter circuit performs median filter processing for multi-gradation image data stored in an FIFO storage section. The image processing apparatus is suitable for use in measuring the position, shape, size, etc. of an object from multi-gradation image data obtained as a result of photographing the object with a camera or the like.

대표청구항 ▼

[ What is claimed is:] [1.] An image processing apparatus including a filter circuit which performs median filter processing to obtain a median of multi-gradation image data with regard to a predetermined number of pixels including a target pixel and which uses the thus obtained median as multi-grad

[ What is claimed is:] [1.] An image processing apparatus including a filter circuit which performs median filter processing to obtain a median of multi-gradation image data with regard to a predetermined number of pixels including a target pixel and which uses the thus obtained median as multi-gradation image data for the target pixel, the image processing apparatus comprising:an FIFO storage section which holds multi-gradation image data with regard to the predetermined number of pixels to be subjected to median filter processing by said filter circuit;a data write control section for writing into said FIFO storage section in a predetermined order the multi-gradation image data with regard to the target pixel to be subjected to median filter processing by said filter circuit;a counting section for counting the number of items of multi-gradation image data which are written into said FIFO storage section by said data write control section; anda filter circuit control section for controlling the operation of said filter circuit in response to a resultant count of said counting section,whereby when said counting section has counted up to the predetermined number, or when the counted value of said counting section is increased by a predetermined number after said counting section has counted up to the predetermined number, said filter circuit control section causes said filter circuit so as to perform median filter processing for the multi-gradation image data stored in said FIFO storage section.