IMAGE PROCESSING APPARATUS FOR DETERMINING A THRESHOLD FOR EXTRACTING AN EDGE PIXEL BASED ON A REGION CORRESPONDING TO A SURFACE FACING AN IMAGING DEVICE

An image processing apparatus includes a processor for acquiring an input image, calculating a fluctuation range of a gradation value of a pixel within a region corresponding to a document backing in the input image, determining a threshold, based on the fluctuation range, extracting an edge pixel c...

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Bibliographic Details
Main Authors MIYASHITA, Jun, OHMI, Kunihiko
Format Patent
LanguageEnglish
Published 16.04.2020
Subjects
CALCULATING
COMPUTING
COUNTING
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
PHYSICS
PICTORIAL COMMUNICATION, e.g. TELEVISION
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Summary:An image processing apparatus includes a processor for acquiring an input image, calculating a fluctuation range of a gradation value of a pixel within a region corresponding to a document backing in the input image, determining a threshold, based on the fluctuation range, extracting an edge pixel corresponding to a boundary between a document and the document backing from the input image using the threshold, detecting a document region from the edge pixel, and an output device for outputting an image obtained by cutting a region corresponding to the document region from the input image.
Bibliography:Application Number: US201916378359