Pfu Limited

Hiroyasu Goto

Kiyoto Kosaka

Hirokazu Kawatani

Takeshi Yokogawa

An information processing device executes: acquiring a scanned image of a document and a protective sheet that protects the document, the scanned image being obtained by imaging the document and the protective sheet while being conveyed at the same time; acquiring a first length that is a conveying direction length of a predetermined portion of the protective sheet; acquiring a second length that is a conveying direction length of the predetermined portion in the scanned image; and estimating a ratio between a document length, which is a conveying direction length of the document, and a document image length, which is a conveying direction length of the document in the scanned image, based on the first length and the second length.

Information processing device, method, and a non-transitory computer readable storage medium for scanning an image using a protective sheet to estimate a ratio of document lengths, acquired from scanned images, to correct a length of a scanned image or length of a cropped image, based on the ratio

There are provided an image processing apparatus, line detection method and a computer-readable, non-transitory medium that can precisely detect boundaries of a document from a read image. The image processing apparatus includes an edge pixel extractor for extracting edge pixels from an input image, a line candidate detector for extracting a line candidate from the extracted edge pixels by using Hough transformation, and a line detector for detecting a line from edge pixels within a predetermined distance from the line candidate by using the least square method.

Image processing apparatus, line detection method, and computer-readable, non-transitory medium

There are provided an image processing apparatus, line detection method and a computer-readable, non-transitory medium that can precisely detect boundaries of a document from a read image. The image processing apparatus includes an edge pixel extractor for extracting edge pixels from an input image which includes a document, a grouping unit for forming mutually adjoining edge pixels in the extracted edge pixels into a group, and an approximated line detector for detecting a line which connects edge pixels which are positioned at the two ends in a horizontal direction and vertical direction among edge pixels which are included in the group as a line which approximates an end of the document.

There are provided an image processing apparatus, rectangle detection method and a computer-readable, non-transitory medium that can precisely detect boundaries of a document from a read image. The image processing apparatus includes an edge pixel extractor for extracting edge pixels from an input image, a line extractor for extracting a plurality of lines from the extracted edge pixels, a rectangle candidate extractor for extracting a plurality of rectangle candidates each of which is comprised of four lines, and a rectangle selector for, for each of the plurality of rectangle candidates, finding a number of edge pixels within a predetermined distance of each side of the rectangle candidate, using a distribution of edge pixels as the basis to find a corner likeness of each corner, and using the number of edge pixels and degree of corner likeness as the basis to select a rectangle from the plurality of rectangle candidates.

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Kahoku, Japan

Hiroyasu Goto