Title:
IMAGE PROCESSING UNIT
Document Type and Number:
Japanese Patent JP3680922
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide an image processing unit that can conduct edge enhancement with less effect of a noise component.
SOLUTION: SUB 14a, 15a, 16a of a vertical direction processing circuit 3a calculate a difference of image data of 4 pixels adjacent each other in a vertical direction and change each difference on the basis of the magnitude of the difference and its sign. Then the circuit 3a generates image data by 4 pixels by using each revised difference. Furthermore, SUB 14b, 15b, 16b of a horizontal direction processing circuit 3b calculate a difference of image data of 4 pixels adjacent each other in a horizontal direction and change each difference on the basis of the magnitude of the difference and its sign. Then the circuit 3b generates image data by 4 pixels by using each revised difference.
Inventors:
Hironobu Fujino
Application Number:
JP20049799A
Publication Date:
August 10, 2005
Filing Date:
July 14, 1999
Export Citation:
Assignee:
Sharp Corporation
International Classes:
H04N5/14; G06T5/00; G06T5/20; H04N1/409; (IPC1-7): H04N1/409; G06T5/20; H04N5/14
Domestic Patent References:
| JP10336451A | ||||
| JP4010767A | ||||
| JP63292777A |
Attorney, Agent or Firm:
Shizuo Sano
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