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Image recognition device, image recognition method and image recognition unit

An image recognition device and image recognition technology, applied to measuring devices, image communication, projection devices, etc., can solve problems such as poor detection accuracy and poor touch recognition accuracy

Active Publication Date: 2021-02-26
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, in the image recognition technology described in Patent Document 1, there is a problem that the detection accuracy of the position of the finger in the depth direction when viewed from the imaging device is poor, and the accuracy of touch recognition is also poor accordingly.

Method used

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  • Image recognition device, image recognition method and image recognition unit
  • Image recognition device, image recognition method and image recognition unit
  • Image recognition device, image recognition method and image recognition unit

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Experimental program
Comparison scheme
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no. 1 Embodiment approach

[0055] First, the image recognition unit of the first embodiment will be described.

[0056] figure 1 It is a figure which shows the structure of the image recognition means of 1st Embodiment of this invention. figure 2 yes figure 1 Block diagram of the projector shown. image 3 yes figure 1 Block diagram of the projector shown. Figure 4 yes image 3 It is a top view of the scanning unit included in the shown projector. Figure 5 yes figure 1 A block diagram of the image recognition device shown. Image 6 It is a figure which shows a 1st pattern and a 2nd pattern. Figure 7 It is a figure explaining an epipolar line. Figure 8 to Figure 10 It is a figure explaining the method of touch recognition respectively.

[0057] figure 1 The image recognition unit 100 shown is, for example, a device that can determine whether a finger (object) F is in contact with a flat screen (image display surface) 900, and switch images displayed on the screen 900 according to the determi...

no. 2 Embodiment approach

[0105] Next, an image recognition unit according to a second embodiment of the present invention will be described.

[0106] Figure 11 It is a diagram showing illumination light used in the image recognition unit according to the second embodiment of the present invention. Figure 12 It is a graph showing the wavelength absorption characteristic of the substance constituting the finger.

[0107] Hereinafter, the image recognition unit according to the second embodiment of the present invention will be described, but the description will focus on points different from the above-mentioned embodiment, and the description of the same items will be omitted.

[0108] The image recognition unit of the second embodiment is mostly the same as that of the above-mentioned first embodiment except for the method of extracting fingers. In addition, the same code|symbol is attached|subjected to the structure similar to the said embodiment.

[0109] In the above-mentioned first embodiment...

no. 3 Embodiment approach

[0118] Next, an image recognition unit according to a third embodiment of the present invention will be described.

[0119] Figure 13 It is a figure which shows the pattern for detection used by the image recognition means of 3rd Embodiment of this invention. Figure 14 with Figure 15 It is a figure explaining the method of touch recognition respectively. In addition, in Figure 14 with Figure 15 In the figure, illustration of the first and second patterns irradiated to the finger is omitted for convenience of description.

[0120] Hereinafter, the image recognition unit according to the third embodiment of the present invention will be described, but the description will focus on points different from the above-mentioned embodiment, and the description of the same matters will be omitted.

[0121] The image recognition unit of the third embodiment is the same as that of the first embodiment described above except that the structure of the detection pattern is differen...

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Abstract

Provided are an image recognition device, an image recognition method, and an image recognition unit capable of high-precision touch recognition. The image recognition device (500) has: a pattern display unit (510), which displays a first pattern (810) and a second pattern (820) at different times, and in the first pattern (810), the bright lines follow the first pattern. Periodic arrangement, in the second pattern (820), the bright lines are arranged according to the second period; the measurement point determination unit (520), which detects the finger (F) located between the camera (400) and the screen (900), determining the fingertip (F1) of the finger (F); and a position detection unit (530), which detects the The position of the fingertip (F1) relative to the screen (900).

Description

technical field [0001] The invention relates to an image recognition device, an image recognition method and an image recognition unit. Background technique [0002] As an image recognition technology for detecting whether a finger is in contact with a screen on which an image from a projector is projected, the technology of Patent Document 1 is known. In the image recognition technology of Patent Document 1, first, the structural light of the grid pattern is projected on the screen, and then, the change of the grid pattern at the position of the finger is confirmed from the image from the imaging device (camera), thereby performing Touch to identify. [0003] prior art literature [0004] patent documents [0005] Patent Document 1: Publication No. US2011 / 0254810 Contents of the invention [0006] The problem to be solved by the invention [0007] However, in the image recognition technology described in Patent Document 1, there is a problem that the accuracy of dete...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/042G01B11/00G03B21/14
CPCG01B11/25G06F2203/04101H04N9/3194G03B17/54G06F3/0425G06F3/042H04N9/3129
Inventor 山内泰介
Owner SEIKO EPSON CORP