JPS6441377A - Area identification method for picture processing unit - Google Patents
Area identification method for picture processing unitInfo
- Publication number
- JPS6441377A JPS6441377A JP62197815A JP19781587A JPS6441377A JP S6441377 A JPS6441377 A JP S6441377A JP 62197815 A JP62197815 A JP 62197815A JP 19781587 A JP19781587 A JP 19781587A JP S6441377 A JPS6441377 A JP S6441377A
- Authority
- JP
- Japan
- Prior art keywords
- picture
- circuit
- halftone
- hue
- data
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Facsimile Image Signal Circuits (AREA)
- Color Image Communication Systems (AREA)
- Image Analysis (AREA)
Abstract
PURPOSE:To obtain a picture with high picture quality by detecting an edge component from a kind of signal formed from plural color signals, comparing the detected result with a threshold value corresponding to a hue signal obtained from a hue identification means so as to identify a halftone region and a binary picture region. CONSTITUTION:A binary picture filter processing circuit 7 applies high frequency emphasis processing to correct the deterioration of the edge component such as a character due to the optical system. A binarizing circuit 8 uses fixed threshold values B1-B3 so as to binarize each of picture data B, G, R only when hue signals b1, g1, r1 from a hue identification circuit 10 are set and outputs the picture data R, G, B as they are when the signals b1, g1, r1 are reset. That is, a contrast data is compared with the fixed threshold value B to apply data conversion. Then the halftone picture data from the obtained halftone picture filter processing circuit 6 and the binary picture data from the binarizing circuit 8 are switched by a selection circuit 9 by using a discrimination signal from the area identification circuit 17 and the result is outputted to the post-stage processing circuit. Thus, even an original having a halftone area and a binary picture area existence in mixture is reproduced with high quality.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62197815A JPS6441377A (en) | 1987-08-06 | 1987-08-06 | Area identification method for picture processing unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62197815A JPS6441377A (en) | 1987-08-06 | 1987-08-06 | Area identification method for picture processing unit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6441377A true JPS6441377A (en) | 1989-02-13 |
Family
ID=16380803
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62197815A Pending JPS6441377A (en) | 1987-08-06 | 1987-08-06 | Area identification method for picture processing unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6441377A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5252992A (en) * | 1989-03-29 | 1993-10-12 | Canon Kabushiki Kaisha | Ink jet recording apparatus |
US5392139A (en) * | 1989-12-29 | 1995-02-21 | Matsushita Electric Industrial Co., Ltd. | Image processing apparatus for performing an edge correction process and digital copying machine comprising said image processing apparatus therefore |
US5786831A (en) * | 1989-03-29 | 1998-07-28 | Canon Kabushiki Kaisha | Ink jet recording apparatus for recording adjacent areas with plural colors |
-
1987
- 1987-08-06 JP JP62197815A patent/JPS6441377A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5252992A (en) * | 1989-03-29 | 1993-10-12 | Canon Kabushiki Kaisha | Ink jet recording apparatus |
US5786831A (en) * | 1989-03-29 | 1998-07-28 | Canon Kabushiki Kaisha | Ink jet recording apparatus for recording adjacent areas with plural colors |
US5392139A (en) * | 1989-12-29 | 1995-02-21 | Matsushita Electric Industrial Co., Ltd. | Image processing apparatus for performing an edge correction process and digital copying machine comprising said image processing apparatus therefore |
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