초록 ▼

This invention provides parallel partial image processing such as spatial convolution or non-linear neighbor arithmetic operation using an image processor which can easily be formed as a large-scale integrated circuit and can be used for various purposes. The image processor has an adder-subtractor,

This invention provides parallel partial image processing such as spatial convolution or non-linear neighbor arithmetic operation using an image processor which can easily be formed as a large-scale integrated circuit and can be used for various purposes. The image processor has an adder-subtractor, a multiplier, a reciprocal number memory in which the reciprocal of an address and the amount of shift are stored at each address, and a shift register. The processor therefore is capable of high-speed dividing operations by multiplying a multiplicant by the reciprocal of a multiplier and by shifting the result of the multiplication. Also, by switching the inputs to the adder-subtractor and to the multiplier rapidly under program control, it is possible to perform arbitrary addition, subtraction, multiplication and division on partial image data of m rows and n columns stored in a partial image memory of the image processor.

대표청구항 ▼

In a partial image processor which divides image input data into partial image data pieces of m rows×n columns and processes said partial image data, an image processor comprising: a partial image memory to which said m×n partial image data pieces are supplied in parallel; a program memory for stori

In a partial image processor which divides image input data into partial image data pieces of m rows×n columns and processes said partial image data, an image processor comprising: a partial image memory to which said m×n partial image data pieces are supplied in parallel; a program memory for storing a program; a control circuit for controlling said program memory to read; an adder-subtractor; a multiplier; a first data memory for storing the output of said adder-subtractor; a second data memory for previously storing constants; a reciprocal number memory in which the reciprocals of addresses are stored at the respective addresses; means for selecting two data outputs from the image outputs of said partial data memory, said first data memory, said adder-subtractor and said multiplier and supplying said two pieces of data to said adder-subtractor; means for selecting one data output from the data outputs of said partial image memory and said adder-subtractor and supplying said one data output to said multiplier as a multiplicand; and means for selecting one output data from the data outputs of said first and second data memories and supplying said one output data directly to said multiplier as a multiplier or supplying said one output data through said reciprocal number memory, by which said one output data is converted to the reciprocal thereof, to said multiplier as a multiplier.