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Image processing apparatus, image processing method, and computer program

An image processing device and image technology, which is applied in the field of image processing, can solve problems such as inability to obtain parameters correctly, and achieve the effect of increasing reliability

Inactive Publication Date: 2011-06-01
KEYENCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, there is a problem that the parameters cannot be obtained correctly when the relative inclination angle between the imaging device and the calibration pattern is not appropriate

Method used

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  • Image processing apparatus, image processing method, and computer program
  • Image processing apparatus, image processing method, and computer program
  • Image processing apparatus, image processing method, and computer program

Examples

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Embodiment Construction

[0027] An image processing apparatus according to an embodiment of the present invention will be described below with reference to the drawings. It should be noted that in all the drawings to be referred to, the same or similar reference numerals are used to refer to components having the same or similar structure or function, and those components that have already been introduced will not be described in detail.

[0028] figure 1 is a block diagram schematically showing the configuration of an image processing apparatus according to an embodiment of the present invention. Such as figure 1 As shown, the image processing apparatus 2 according to the present embodiment is connected with a camera 1 as an imaging device that acquires a calibration pattern image, and a display device that displays the acquired calibration pattern image or the calibration pattern image after performing various types of image conversion processing. 3 connected.

[0029] The image processing appara...

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Abstract

The distortion correction is carried out by acquiring the calibration pattern image by an imaging device and executing calibration based on the acquired calibration pattern image. A plurality of calibration pattern images in which feature points arranged in an imaging range from which images can be picked up by the imaging device are provided at a regular interval is acquired, and a feature point group is extract from each image. The calibration is executed based on the feature point groups respectively extracted from areas with different imaging ranges.

Description

technical field [0001] The present invention relates to an image processing technique capable of performing distortion correction with high precision based on a calibration pattern image obtained by an imaging device. Background technique [0002] In conventional thinking, various inspection systems and defect detection systems have been developed for inspecting a test object and detecting defects of a test object by picking up an image of a test object using an imaging device, and then using the picked-up multivalued image To determine whether the test object is a qualified product. However, when an image is acquired using an imaging device, the image is often distorted due to lens distortion and perspective distortion, and the image cannot be used as it is to determine whether it is a good product or the like unless proper distortion correction is performed. [0003] In order to solve the above problems, for example, "A Flexible New Technique for Camera Calibration" (Zhan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T1/00G06T5/00
CPCG06T7/0018G06T2207/30208G06T2207/30108G06T7/80
Inventor 下平真达
Owner KEYENCE