IMAGE PROCESSING METHOD AND DEVICE

Japanese Patent JP3804214

B2

PROBLEM TO BE SOLVED: To eliminate the shading influence by means of a small number of work memories with respect to a line drawing where the conspicuous shading influence is easily caused and to obtain a nice-looking image.
SOLUTION: It is decided for every prescribed line of the input image data whether the pixels forming the line are equal to the pixels forming an edge part of a line drawing, and the luminance value of each pixel where the luminance influence of the edge part of the line drawing is eliminated is calculated for a processing object line by the background estimation processing (s1). Then it is decided whether the influence of the line drawing part other than the edge part is included in the luminance value of each pixel of the processing object line and the luminance value of each pixel where the influence of the line drawing part is eliminated is calculated when the said influence is included in the luminance value of each pixel by the background estimation correction processing (s2). Furthermore, the luminance is corrected to obtain the desired luminance value and the background is corrected based on the luminance value that is calculated for each pixel by the background correction processing (s3).

JPH05341409	IMAGE INFORMATION PROCESSOR
JPH0752911	[Title of Invention] Image Reader
JPH0397371	IMAGE INPUT DEVICE

Yasuhiko Murayama

JP26169297A

August 02, 2006

September 26, 1997

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Seiko Epson Corporation

H04N1/40; G06T1/00; G06T5/00; H04N1/401; H04N1/407; H04N1/409; H04N5/335; H04N5/361; H04N5/365; H04N5/372; H04N5/378; (IPC1-7): H04N1/401; G06T1/00; G06T5/00; H04N1/407; H04N1/409; H04N5/335

JP4178072A
JP9181888A
JP6197223A
JP62287784A

Masahiko Ueyanagi
Osamu Suzawa

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