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US 7,024,043 B1Granted
Color document image recognizing apparatus
AssigneeFujitsu Limited
InventorsKatsuhito Fujimoto, Hiroshi Kamada
Life of this patent
Estimating the term…
Abstract
After a gray scale image extracting unit converts an input document image to a gray scale image, a multi-code image binary-coding unit converts the image to a binary image having a value in which each pixel indicates either a background area or a plotting area in the image, and outputs the binary image to a binary image recognizing unit. In the multi-code binary-coding unit, a partial area extracting unit extracts one or more partial areas in the gray scale image. A partial image binary-coding unit executes a binary-coding process for each of the partial areas in the gray scale image. A binary image combining unit combines one or more partial binary images and constitutes a binary image of the entire gray scale image.
Claims39
An apparatus for recognizing a gray scale image, comprising:
- inputting means for inputting a gray scale image;
- and
- multi-code image binary-coding means for converting the inputted gray scale image to a binary image by determining whether each pixel corresponds to a background area or a plotting area and producing binary values in which each pixel has a value representing either a background area or a plotting area in the gray scale image, said multi-code image binary-coding means comprising:
- partial area extracting means for one or more partial areas in the gray scale image,
- partial image binary-coding means for executing a binary-coding process for each of the partial areas of the gray scale image and extracting a partial binary image, and
- binary image combining means for combining the one or more partial binary images and for constituting the binary image of the entire scale image.
3 more elements
An apparatus for recognizing a color document image, comprising:
- gray scale image extracting means for extracting a gray scale image from an inputted color document image;
- and
- multi-code image binary-coding means for converting the gray scale image to a binary image by determining whether each pixel of the gray scale image corresponds to a background area or a plotting area and producing binary values in which each pixel has a value representing either a background area or a plotting area in the gray scale image.
An apparatus for recognizing a color document image, comprising:
- gray scale image extracting means, when an inputted document image is a color document image, for extracting a gray scale image from the color document image;
- and
- multi-code image binary-coding means, when an inputted document image is a color document image, for converting a gray scale image extracted by the gray scale image extracting means to a binary image by determining whether each pixel of the gray scale image corresponds to a background area or a plotting area and producing binary values in which each pixel has a value representing either a background area or a plotting area in the gray scale image, or when an inputted document image is a gray scale image, for converting the gray scale image to a binary image in which each pixel has a value representing either a background area or a plotting area in the gray scale image.
An apparatus for recognizing a gray scale image, comprising:
- inputting means for inputting a gray scale image;
- and
- multi-code image binary-coding means for converting the inputted gray scale image to a binary image in which each pixel has a value representing either a background area or a plotting area in the gray scale image, wherein
- said multi-code image binary-coding means further comprises:
- partial area extracting means for extracting one or more partial areas in the gray scale image,
- partial image binary-coding means for executing a binary-coding process for each of the partial areas of the gray scale image and extracting a partial binary image;
- and
- binary image combining means for combining the one or more partial binary images and for constituting the binary image of the entire scale image, and
- where said binary image combining means sets a pixel value in the binary image to be outputted, corresponding to a pixel which is not contained in any of the partial areas in the gray scale image to a value of a background color.
6 more elements
An apparatus for recognizing a gray scale image, comprising:
- inputting means for inputting a gray scale image;
- and
- multi-code image binary-coding means for converting the inputted gray scale image to a binary image in which each pixel has a value representing either a background area or a plotting area in the gray scale image;
- wherein
- said multi-code image binary-coding means further comprises:
- partial area extracting means for one or more partial areas in the gray scale image;
- partial image binary-coding means for executing a binary-coding process for each of the partial areas of the gray scale image and extracting a partial binary image, and
- binary image combining means for combining the one or more partial binary images and for constituting the binary image of the entire scale image, and
- where said binary image combining means calculates a pixel value in the binary image to be outputted, corresponding to a pixel which is contained in one or more of the partial areas in the gray scale image, by a logical operation in which corresponding pixel values in the partial binary images obtained from each partial area are combined.
6 more elements
An apparatus for recognizing a gray scale image, comprising:
- inputting means for inputting a gray scale image;
- and
- multi-code image binary-coding means for converting the inputted gray scale image to a binary image in which each pixel has a value representing either a background area or a plotting area in the gray scale image, wherein
- said multi-code image binary-coding means further comprises:
- partial area extracting means for one or more partial areas in the gray scale image,
- partial image binary-coding means for executing a binary-coding process for each of the partial areas of the gray scale image and extracting a partial binary image;
- and
- binary image combining means for combining the one or more partial binary images and for constituting the binary image of the entire scale image, and
- where said binary image combining means assigns a corresponding pixel value in the partial binary image obtained from the partial area with top-priority which is determined based on a quantitative priority according to a predetermined criterion as a pixel value in the binary image to be outputted, corresponding to a pixel which is contained in one or more partial areas of the gray scale image.
6 more elements
An apparatus for recognizing a gray scale image, comprising:
- inputting means for inputting a gray scale image;
- and
- multi-code image binary-coding means for converting the inputted gray scale image to a binary image by determining whether each pixel corresponds to a background area or a plotting area and producing binary values in which each pixel has a value representing either a background area or a plotting area in the gray scale image, wherein
- said multi-code image binary-coding means further comprises:
- partial area extracting means for one or more partial areas in the gray scale image,
- partial image binary-coding means for executing a binary-coding process for each of the partial areas of the gray scale image and extracting a partial binary image;
- and
- binary image combining means for combining the one or more partial binary images and for constituting the binary image of the entire scale image, and
- where said partial area extracting means extracts one or more partial areas where both background color and plotting color of the gray scale image each have a specific gray scale value.
6 more elements
An apparatus for recognizing a gray scale image, comprising:
- inputting means for inputting a gray scale image;
- and
- multi-code image binary-coding means for converting the inputted gray scale image to a binary image in which each pixel has a value representing either a background area or a plotting area in the gray scale image, wherein
- said multi-code image binary-coding means further comprises:
- partial area extracting means for one or more partial areas in the gray scale image,
- partial image binary-coding means for executing a binary-coding process for each of the partial areas of the gray scale image and extracting a partial binary image;
- and
- binary image combining means for combining the one or more partial binary images and for constituting the binary image of the entire scale image, and
- where said partial area extracting means outputs one or more rectangular areas as the partial areas.
6 more elements
An apparatus for recognizing a gray scale image, comprising:
- inputting means for inputting a gray scale image;
- and
- multi-code image binary-coding means for converting the inputted gray scale image to a binary image in which each pixel has a value representing either a background area or a plotting area in the gray scale image, wherein
- said multi-code image binary-coding means further comprises:
- partial area extracting means for one or more partial areas in the gray scale image,
- partial image binary-coding means for executing a binary-coding process for each of the partial areas of the gray scale image and extracting a partial binary image;
- and
- binary image combining means for combining the one or more partial binary images and for constituting the binary image of the entire scale image, and
- where said partial area extracting means extracts one or more partial areas using an edge strength image or edge direction image obtained by executing an edge extracting process for the gray scale image.
6 more elements
An apparatus for recognizing a gray scale image, comprising:
- inputting means for inputting a gray scale image;
- and
- multi-code image binary-coding means for converting the inputted gray scale image to a binary image in which each pixel has a value representing either a background area or a plotting area in the gray scale image, wherein
- said multi-code image binary-coding means further comprises:
- partial area extracting means for one or more partial areas in the gray scale image,
- partial image binary-coding means for executing a binary-coding process for each of the partial areas of the gray scale image and extracting a partial binary image;
- and
- binary image combining means for combining the one or more partial binary images and for constituting the binary image of the entire scale image, and
- where said partial image binary-coding means extracts the partial binary image by executing a binary-coding process for a designated partial area of the gray scale image, based on a single threshold.
6 more elements
An apparatus for recognizing a gray scale image, comprising:
- inputting means for inputting a gray scale image;
- and
- multi-code image binary-coding means for converting the inputted gray scale image to a binary image in which each pixel has a value representing either a background area or a plotting area in the gray scale image, wherein
- said multi-code image binary-coding means further comprises:
- partial area extracting means for one or more partial areas in the gray scale image,
- partial image binary-coding means for executing a binary-coding process for each of the partial areas of the gray scale image and extracting a partial binary image;
- and
- binary image combining means for combining the one or more partial binary images and for constituting the binary image of the entire scale image, and
- where said partial image binary-coding means roughly extracts a plotting area by executing a binary-coding process for a designated partial area of the gray scale image, based on a single threshold, and extracts the partial binary image by executing a local binary-coding process in which a variable threshold is obtained for each pixel in the plotting area.
6 more elements
An apparatus for recognizing a gray scale image, comprising:
- inputting means for inputting a gray scale image;
- and
- multi-code image binary-coding means for converting the inputted gray scale image to a binary image in which each pixel has a value representing either a background area or a plotting area in the gray scale image, wherein
- said multi-code image binary-coding means further comprises:
- partial area extracting means for one or more partial areas in the gray scale image,
- partial image binary-coding means for executing a binary-coding process for each of the partial areas of the gray scale image and extracting a partial binary image;
- and
- binary image combining means for combining the one or more partial binary images and for constituting the binary image of the entire scale image, and
- where said partial image binary-coding means calculates a gray scale partial image corresponding to a designated partial area by interpolating a pixel value of the gray scale image and executing a subpixel generating process which increases a number of pixels of an image, and extracts the partial binary image by executing the binary-coding process for the gray scale partial image.
6 more elements
An apparatus for recognizing a gray scale image, comprising:
- an input unit inputting a gray scale image;
- and
- a multi-code image binary-coding-unit converting the inputted gray scale image to a binary image by determining whether each pixel corresponds to a background area or a plotting area and producing binary values in which each pixel has a value representing either a background area or a plotting area in the gray scale image, said multi-code image binary-coding means comprising:
- partial area extracting means for one or more partial areas in the gray scale image,
- partial image binary-coding means for executing a binary-coding process for each of the partial areas of the gray scale image and extracting a partial binary image, and
- binary image combining means for combining the one or more partial binary images and for constituting the binary image of the entire scale image.
3 more elements
An apparatus for recognizing a color document image, comprising:
- a gray scale image extracting unit extracting a gray scale image from an inputted color document image;
- and
- a multi-code image binary-coding unit converting the gray scale image to a binary image by determining whether each pixel of the gray scale image corresponds to a background area or a plotting area and producing binary values in which each pixel has a value representing either a background area or a plotting area in the gray scale image.
An apparatus for recognizing a color document image, comprising;
- a gray scale image extracting unit, when an inputted document image is a color document image, extracting a gray scale image from the color document image;
- and
- a multi-code image binary-coding unit when an inputted document image is a color document image, converting a gray scale image extracted by the gray scale image extracting unit to a binary image by determining whether each pixel of the gray scale image corresponds to a background area or a plotting area and producing binary values in which each pixel has a value representing either a background area or a plotting area in the gray scale image, or when an inputted document image is a gray scale image, converting the gray scale image to a binary image in which each pixel has a value representing either a background area or a plotting area in the gray scale image.
Dependencies are inferred from the claim text.