(57) ABSTRACT A method of delineating titles within a grayScale image, in which a
grayScale image is received, eg, by Scanning a document, and then is Subjected to multi …

An image data compressing apparatus comprises a color selecting unit, a data separating
unit and a data compressing unit. The selecting unit selects an arbitrary color contained in …

6,661,907 B2* 12/2003 Ho et al........................ 382,118 JP 08-065514 A 3, 1996 6,668,080
B1 12/2003 Torr et al. JP O9-186861 A 7/1997 6,718,059 B1* 4/2004 Uchida …

US8189917B2 - Methods and systems for locating text in a digital image - Google Patents
US8189917B2 - Methods and systems for locating text in a digital image - Google Patents …

A source image containing both relatively low frequency information (ie graphics, pictures
and background) and relatively high frequency information (ie text) are input to an image …

Aspects of the present invention relate to methods and systems for segmenting a digital
image into regions. A frequency-of-occurrence of image values may be determined …

US7876959B2 - Methods and systems for identifying text in digital images - Google Patents
US7876959B2 - Methods and systems for identifying text in digital images - Google Patents …

BACKGROUND Binarization of Scanned gray Scale imageS which is the first Step used in a
document image analysis System Such as an optical character recognition System. This …

According to the prior art mentioned above, the tradi tional method utilized to divide a pre-
processed image utilize the manually determined threshold value as the criterion when …

In a digital image, for each pixel to be thresholded, a threshold is selected from a set of
thresholds. Selection may be based on relative magnitudes of the thresholds. At least one of …