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Image processing method and image processor, digital camera equipment, and recording medium with image processing program stored thereon

A technology of image processing and image processing devices, applied in the field of preprocessing, which can solve the problems that the camera cannot know the user's intention and the user cannot take pictures of objects again

Active Publication Date: 2008-08-20
RICOH KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] Also, it is impossible for the camera to know the user's intention, so the user's desired rectangle may not always be included in the automatically extracted rectangle
However, conventional techniques only allow the user to select among the extracted rectangles
If the desired rectangle is not included, the user bears the trouble of re-photographing the object
Also, if an object is photographed from a moving vehicle and the desired rectangle is not included in the extracted rectangle, the user may not be able to photograph the object again

Method used

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  • Image processing method and image processor, digital camera equipment, and recording medium with image processing program stored thereon
  • Image processing method and image processor, digital camera equipment, and recording medium with image processing program stored thereon
  • Image processing method and image processor, digital camera equipment, and recording medium with image processing program stored thereon

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Embodiment Construction

[0070] According to an embodiment of the present invention, in order to detect a straight line from an input image without performing the Hough transform that requires a lot of time, an edge direction is defined for each pixel of the input image, an edge region is detected from each edge direction, and the detection corresponds to each Lines (straight lines) in the edge area. This increases the speed of edge detection processing.

[0071] As described with reference to the background art, if the vertical sides and horizontal sides of a quadrilateral are determined based on the inclinations of N detected straight lines, conditions for photographing an object are limited. Thus, in the present invention, all possible quadrilaterals that can be formed by combinations of four lines from among the N detected straight lines are considered, so that objects can be photographed under different conditions. However, it takes a long time to derive all possible quadrilaterals formed by com...

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Abstract

Techniques for identifying one or more quadrilaterals from an input image are disclosed. detecting an edge area from an input image, extracting a line corresponding to the edge area, classifying a line pair selected from the extracted lines according to a positional relationship between two lines included in the line pair, calculating a line pair evaluation value for the line pair, A combination of two wire pairs is selected, a quadrilateral is generated from the four wires included in the selected two wire pairs, a quadrilateral evaluation value is calculated for the quadrilateral based on the classification and pair evaluation values ​​of the two wire pairs forming the quadrilateral, and based on the calculated The quadrilateral evaluation value selects the quadrilateral.

Description

technical field [0001] The present invention relates to a preprocessing technique for correcting distortion of a captured image, and more particularly, to an image processing method and apparatus, a digital camera having the functions of the image processing method and apparatus, and recording an image for recognizing a quadrilateral from an input image The recording medium of the processing program. [0002] Furthermore, the present invention relates to an image processing method and apparatus, a digital camera having the functions of the image processing method and apparatus, and a recording medium recording an image processing program for extracting a shape such as a quadrilateral from a captured image and displaying Image that includes highlighted shape areas. Background technique [0003] In recent years and continuing to this day, digital cameras have become widely popular, and are used not only to photograph scenery or people, but also to photograph train schedules, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T3/00H04N1/387H04N5/232
Inventor 丸山刚青木伸
Owner RICOH KK
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