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Image detection device and image detection method

一种图像检测装置、图像检测的技术，应用在图像分析、图像数据处理、字符和模式识别等方向，能够解决难以正确地识别被摄体等问题，达到高速且正确图像识别处理的效果

Inactive Publication Date: 2010-03-24
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In other words, when there is an image area having a size different from that used as the basis for the above inference, it is difficult to correctly recognize the subject

Method used

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  • Image detection device and image detection method
  • Image detection device and image detection method
  • Image detection device and image detection method

Examples

Experimental program
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no. 1 example

[0031] The first embodiment will be described below.

[0032] figure 1 is a block diagram showing the configuration of the image detection device for realizing the present embodiment. Reference numeral 101 denotes a CPU for performing control of the entire apparatus, data processing, and the like. Reference numeral 102 denotes a memory including a ROM storing a program and the like executed by the CPU 101 to control the apparatus, and a RAM used as a work area for processing and the like. Reference numeral 103 denotes an external storage device; and reference numeral 104 denotes a display as a display section for displaying various displays represented by an input image, an installation state of an image detection device, and the like. Reference numeral 105 denotes an input device such as a keyboard, a mouse, and various switches for inputting predetermined instructions, data; and reference numeral 106 denotes an image input device such as a digital camera. Note that, when ...

no. 2 example

[0074] In the second embodiment, a case will be described assuming a number plate as an example of a specific image to be searched.

[0075] Also, in the second embodiment, figure 2 The shown flow chart showing the operation of the overall system of the present invention remains the same as that described in the first embodiment.

[0076] Figure 9 It is a diagram showing an example of a captured image of a number plate as an input image of this embodiment. There is the possibility that there may be multiple number plates of different sizes and the number plates are not necessarily photographed from the front.

[0077] Figure 10 It is a diagram showing an example of a clipping image of the number plate area detected in step S203 in this embodiment. This trapezoidal-shaped quadrilateral area is obtained when the car body is shot obliquely from the left.

[0078] Figure 11 It is a diagram showing an example of a clipping image of the number plate area detected in step S...

no. 3 example

[0087] In the present invention, it is preferable to detect all specific images to be searched in all sizes in the original image, but there is a case where the user only wishes to detect specific images to be searched in a specific size desired by the user and other images near the specific size. The specific image of the size to search for.

[0088] Therefore, in the present embodiment, the user specifies the size of a specific image that the user wishes to detect, and only images of that size and images of sizes near that size are detected.

[0089] Figure 13 is a flowchart showing the operation of the entire system in this embodiment. The CPU 101 reads the program stored in the memory 102, and according to Figure 13 The flow chart shown performs the following operations.

[0090] In this embodiment, as in the first embodiment, the case where the specific image to be searched (detected image area) is a number plate is described.

[0091] In step S1301, the CPU 101 per...

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Abstract

An image detection device and an image detection method for efficiently detecting a specific image area existing in an image. The image detection device first changes the size of an original image onthe basis of the initial value of a magnification (scaling factor) with respect to the original image and detects the specific image (license plate, for example). The change of the size of the original image and the detection of the specific image are repeatedly carried out with the magnification changed each time.By repeating the detection with an image scaled up or down, speeding up is achieved,and also by determining an area where no other specific image exists and performing the detection efficiently by using this information, speeding up is achieved.

Description

technical field [0001] The present invention relates to an image detection device and an image detection method, and more particularly, to an image detection device and an image detection method for detecting a specific image area from an image captured by a digital camera or video camera or the like. Background technique [0002] There are many image processing systems that provide a detection unit for detecting a specific image area of ​​an object such as a number plate, in which the format of the specific image area is predetermined to some extent with respect to the order of characters. However, in many cases, the condition for determination is that the size of a specific image region is inferred to some extent, or that the number of sizes of image regions that can be correctly recognized is one. In other words, when there is an image region having a size different from that used as a basis for the above-described inference, it is difficult to correctly recognize a subje...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00
CPCG06K2209/15G06K9/00771G06K9/325G06V20/52G06V20/62G06V20/625
Inventor 鹫田真一
Owner CANON KK
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