Method of image sampling and apparatus thereof
AssigneeUmax Data Systems Inc.
InventorsShih-Zheng Kuo, Shih-Huang Chen
Life of this patent
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Abstract
A method of image sampling and an apparatus thereof. The apparatus comprises: an adder; a first register, the output of which is fed back to the adder; a first multiplexer, which outputs a ratio or a weighted parameter; a multiplier, which receives an input image value and the output of the first multiplexer; an adder/subtracter, which receives the output of the multiplier; a second multiplexer, which receives the output of the adder/subtracter and the multiplier; and a second register, which receives the output of the second multiplexer. By the method of approximation and recursion, the input image data can be processed in real time to produce the output image data.
Claims21
An apparatus of image sampling for processing an input image value to produce an output image value in a digital image scan system, wherein the digital image scan system provides a first parameter, and the first parameter is a ratio of non-optical and formal resolution in the digital image scan system, which comprises:
- an adder, for receiving the first parameter and a second parameter, and producing a carry bit and a value;
- a first register, for receiving the value, and outputting the second parameter, which is fed back to the adder;
- a first multiplexer, for deciding to output the first or the second parameter under the control of the carry bit;
- a multiplier, for receiving the input image value and the output of the first multiplexer, and outputting a third parameter;
- an adder/subtracter, for doing the addition or the subtraction of the third parameter and a fourth parameter under the control of the carry bit and outputting a fifth parameter;
- a second multiplexer, for deciding to output the third or the fifth parameter;
- a second register, for receiving the fifth parameter, and outputting the fourth parameter;
- and
- a divider, for receiving the output of the adder/subtracter, and outputting the output image value under the control of the carry bit.
A method of image sampling for processing an input image value to produce an output image value in a digital image scan system, wherein the digital image scan system provides a first parameter, and the first parameter is a ratio of non-optical and formal resolution in the digital image scan system, which comprises the steps of:
- setting initial values of a second and a third parameters, wherein the second parameter decides a carry bit;
- replacing the second parameter by a sum of the first and the second parameters;
- inputting the input image value;
- obtaining a product of the input image value and the first parameter, and setting the product as a fourth parameter;
- obtaining a sum of the third and the fourth parameters, and replacing the third parameter by the sum;
- setting a product of the second parameter and the input image value as a fifth parameter, and setting a result of the third parameter subtracted by the fifth parameter as the output image value, and replacing the fifth parameter by the third parameter when the carry bit is a first value;
- and
- going back to the step of replacing the second parameter.
Dependencies are inferred from the claim text.