The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 16, 1998
Filed:
May. 12, 1997
Kenichi Ohta, Kawasaki, JP;
Takashi Yabe, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A color signal processing apparatus which is capable of providing satisfactory operation accuracy while keeping the memory size relatively small. A dividing circuit divides three input signals R, G, and B into upper bit data and lower bit data. A first table memory stores output values for all combinations of the three upper bit signals, the upper bit data of the three input signals being accepted as address signals and a first output value being provided. A second table memory stores the output values for all combinations of signal values obtained by adding a prescribed offset (e.g. 2.sup.NL /2) to a signal value which is expressed by upper bits, upper bit data of the three input signals being accepted as address signals and a second output value being provided. An interpolation circuit outputs a final output signal in accordance with the output value of the first table memory, the output value of the second table memory and the lower bit data.