Registers – Coded record sensors – Particular sensor structure
Patent
1997-12-08
2000-06-06
Hajec, Donald
Registers
Coded record sensors
Particular sensor structure
2354621, 23546224, 23546241, G06K 710, G06K 1512, G02B 708
Patent
active
06070800&
ABSTRACT:
An image input section enters a document image including a bar code, and converts the document image into a binary image. An image memory section memorizes the binary image supplied from the image input section. A mask judging section performs a scanning operation using an M.times.M pixel window for detecting an alternate pattern from the binary image supplied from the image input section. A small pattern removing section removes small patterns from a binary image sent from the mask judging section. An expanding section expands a pattern involved in a binary image by an amount equivalent to k1 pixels when this binary image is sent from the small pattern removing section. A contracting section contracts a pattern involved in a binary image by an amount equivalent to k2 pixels when this binary image is sent from the expanding section. A region detecting section obtains the feature quantity of each pattern involved in a binary image sent from the contracting section, and detects a bar code candidate region based on the detected feature quantity. And, a decoding section decodes a detected bar code by reading a specific image region from the image memory section when the specific image region corresponds to the bar code candidate region detected by the region detecting section.
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Asano Toru
Fujita Mikio
Kawahara Toyoki
Komizo Shigeo
Yamamoto Atsuharu
Hajec Donald
Matsushita Electric - Industrial Co., Ltd.
Rodriguez Douglas X.
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