Dataforms, such as bar codes and matrix codes, are recognized by analysis of histogram type data derived for a plurality of window sections of an image area. Typically, an image area 512 pixels high by 480 pixels wide is divided into 240 window areas, each including 1024 pixels in a 32 by 32 pixel s
Dataforms, such as bar codes and matrix codes, are recognized by analysis of histogram type data derived for a plurality of window sections of an image area. Typically, an image area 512 pixels high by 480 pixels wide is divided into 240 window areas, each including 1024 pixels in a 32 by 32 pixel square. A histogram for a window section overlying a portion of the dataform may typically exhibit two peaks representing the two principal reflective values (black and white, for example) of the elements and spaces of a dataform. A background (quiet zone) window section histogram exhibits one principal peak representing the background value (white, for example). The background window sections and the dataform window sections are assigned to two different groups. One or both groups are then used for one or more of the following: recognizing the presence of a dataform; determining whether the dataform is darker or lighter than the background; and locating the dataform within the image area. Also, a single histogram is used to identify the type of dataform, based upon the histogram signature of the dataform.
대표청구항▼
[ What is claimed is:] [1.] A method of recognizing, in an image area, a transition between: (i) a first pattern characterized by X colors, where X is greater than 1 and (ii) a second pattern characterized by Y colors, where Y may be 1, and X and Y are different integer values, comprising the steps
[ What is claimed is:] [1.] A method of recognizing, in an image area, a transition between: (i) a first pattern characterized by X colors, where X is greater than 1 and (ii) a second pattern characterized by Y colors, where Y may be 1, and X and Y are different integer values, comprising the steps of:(a) sampling pixel values, each representative of a reflective value of an incremental part of a window section of said image area, for a plurality of window sections including at least one window section overlying a portion of said first pattern, and one window section overlying a portion of said second pattern, to determine the number of occurences of each pixel value representative of the presence of different colors within each said window section;(b) categorizing each said window section in one of the following groups: (i) a first group for which said derived data indicates the presence of X principal colors, (ii) a second group for which said derived data indicates the presence of Y principal colors, and (iii) a third group for other window sections; and(c) utilizing the composite positions of window sections of at least one of said groups of window sections to determine a transition between said first pattern, represented by said first group, and said second pattern, represented by said second group.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (8)
Joseph Eugene B. (Setauket NY) Pavlidis Theodosios (Setauket NY), Analog waveform decoder utilizing histogram of edge sizes.
Chandler Donald G. (43 Springwood Ct. Princeton NJ 08540) Batterman Eric P. (207-11 Salem Ct. Princeton NJ 08540), Omnidirectional bar code reader with method and apparatus for detecting and scanning a bar code symbol.
Chandler Donald G. (Princeton NJ) Batterman Eric P. (Princeton NJ) Shah Govind (Princeton Junction NJ), Polygonal information encoding article, process and system.
Fujita Mikio,JPX ; Yamamoto Atsuharu,JPX ; Kawahara Toyoki,JPX ; Yoshida Kuinio,JPX ; Asano Toru,JPX ; Komizo Shigeo,JPX, Bar code image processing apparatus capable of identifying position and direction of a bar code.
Longacre, Jr., Andrew; Hussey, Robert M.; Meier, Timothy P.; Rosetti, James B.; Barber, Charles P.; Gerst, III, Carl W., Bar code reading device having image processing mode.
Sevier, Mitchel P.; Doren, Michael J.; Gomez, Garrison; Kosecki, James; Yeakley, Daniel D.; Powilleit, Sven M. A., Bar code reading terminal with video capturing mode.
Sevier, Mitchel P.; Doren, Michael; Gomez, Garrison; Kosecki, James; Yeakley, Daniel D.; Powilleit, Sven M. A., Bar code reading terminal with video capturing mode.
Longacre, Jr., Andrew; Hussey, Robert M.; Meier, Timothy P.; Rosetti, James B.; Barber, Charles P.; Gerst, III, Carl W., Imaging device operative for image processing.
Longacre, Jr.,Andrew; Ehrhart,Michael A.; Koziol,Thomas J.; Hussey,Robert M.; Parker,James A., Optical reader comprising illumination assembly and solid state image sensor.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.