Title:
FREQUENCY MODULATED SCREENING METHOD BASED ON THE DUAL FEEDBACK ERROR DIFFUSION
Document Type and Number:
WIPO Patent Application WO/2006/114031
Kind Code:
A1
Abstract:
The present invention discloses a frequency modulated screening method based on the dual feedback error diffusion. This method belongs to the method for generating halftone grid dots in the field of image hard copy. There is a certain technique difficulty in the prior FM and AM screening technology for the output device to output the good quality halftone image grid dots in low resolution, i.e. the satisfactory effect of the reproduction of the layered details in manuscript image as well as the image smoothess can not be achieved. The method of present invention organically combines the FM screening with the AM screening during the net hanging by using the dual feedback technique based on the basic arithmetic of error diffusion so that the effect of hybrid screening is achieved. In the case of the resolution of the output device is low, the method of present invention can solve the problem of easily losing of the layer of grid dots and can reduce the texture due to the random distribution characteristic, thus the richly layered halftone image of good quality can be output.
Inventors:
LI HAIFENG (CN)
YANG BIN (CN)
MA SHIXIONG (CN)
YANG BIN (CN)
MA SHIXIONG (CN)
Application Number:
PCT/CN2005/001826
Publication Date:
November 02, 2006
Filing Date:
November 02, 2005
Export Citation:
Assignee:
BEIJING FOUNDER ELECTRONICS CO (CN)
UNIV BEIJING (CN)
LI HAIFENG (CN)
YANG BIN (CN)
MA SHIXIONG (CN)
UNIV BEIJING (CN)
LI HAIFENG (CN)
YANG BIN (CN)
MA SHIXIONG (CN)
International Classes:
H04N1/40; H04N1/405
Foreign References:
| US20040190071A1 | 2004-09-30 | |||
| US6307647B1 | 2001-10-23 | |||
| US20050083554A1 | 2005-04-21 | |||
| CN1424694A | 2003-06-18 | |||
| EP0606132A2 | 1994-07-13 |
Other References:
PAUL A. DELABASTITA: "Screen Techniques: Moire in Four Color Printing", TAGA PROCEEDINGS, vol. 1, 1992, pages 44 - 66
T. N. PAPPAS; D. L. NEUHO: "Printer Models and Error Diffusion", IEEE TRANSACTIONS ON IMAGE PROCESSING, vol. 4, January 1995 (1995-01-01), pages 66 - 79
DAMERA-VENKATA, N ET AL.: "Adaptive Threshold Modulation for Error Diffusion Halftoning", IEEE TRANSACTIONS ON IMAGE PROCESSING, IEEE SERVICE CENTER, PISCATAWAY, NJ, US, vol. 10, no. 1, 1 January 2001 (2001-01-01), pages 104 - 116
LEVIEN, R: "Output Dependent Feedback in Error Diffusion Halftoning", PROCEEDINGS OF IS&T ANNUAL CONFERENCE, vol. 46, 1 May 1993 (1993-05-01), pages 115 - 118
ESCHBACH, R ET AL.: "Threshold Modulation and Stability in Error Diffusion", IEEE SIGNAL PROCESSING MAGAZINE, IEEE SERVICE CENTER, PISCATAWAY, NJ, US, vol. 20, no. 4, 1 July 2003 (2003-07-01), pages 39 - 50
See also references of EP 1909482A4
T. N. PAPPAS; D. L. NEUHO: "Printer Models and Error Diffusion", IEEE TRANSACTIONS ON IMAGE PROCESSING, vol. 4, January 1995 (1995-01-01), pages 66 - 79
DAMERA-VENKATA, N ET AL.: "Adaptive Threshold Modulation for Error Diffusion Halftoning", IEEE TRANSACTIONS ON IMAGE PROCESSING, IEEE SERVICE CENTER, PISCATAWAY, NJ, US, vol. 10, no. 1, 1 January 2001 (2001-01-01), pages 104 - 116
LEVIEN, R: "Output Dependent Feedback in Error Diffusion Halftoning", PROCEEDINGS OF IS&T ANNUAL CONFERENCE, vol. 46, 1 May 1993 (1993-05-01), pages 115 - 118
ESCHBACH, R ET AL.: "Threshold Modulation and Stability in Error Diffusion", IEEE SIGNAL PROCESSING MAGAZINE, IEEE SERVICE CENTER, PISCATAWAY, NJ, US, vol. 20, no. 4, 1 July 2003 (2003-07-01), pages 39 - 50
See also references of EP 1909482A4
Attorney, Agent or Firm:
INSIGHT INTELLECTUAL PROPERTY LIMITED (Tower A InDo Building, No 48 A Zhichun Roa, Haidian District Beijing 8, CN)
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