Texture haptic reproduction method based on image gray scale recovery shape technology

A technology to restore shape and image grayscale, applied in image data processing, image generation, image enhancement and other directions, can solve the problems of force and tactile reproduction distortion, inability to extract texture features from color texture images, and failures.

Inactive Publication Date: 2017-11-14
NANJING UNIV OF INFORMATION SCI & TECH
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

The color image texture force tactile reproduction method purely based on grayscale processing makes the virtual texture tactile properties only related to the light and dark distribution formed by the change of the surface contour of the object under illumination. These methods have high requirements

Method used

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  • Texture haptic reproduction method based on image gray scale recovery shape technology
  • Texture haptic reproduction method based on image gray scale recovery shape technology
  • Texture haptic reproduction method based on image gray scale recovery shape technology

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Embodiment Construction

[0093] Below in conjunction with accompanying drawing and by embodiment the present invention is described in further detail, and following embodiment is explanation of the present invention and the present invention is not limited to following embodiment.

[0094] Such as figure 1 As shown, the texture force tactile reproduction method based on image gray scale recovery shape technology of the present invention comprises the following steps:

[0095] Step 1: recover the 3D contour from a single image;

[0096] 1.1 Carry out color correction to the collection equipment Use the collection equipment to collect color images from different angles;

[0097] First, we need to color correct the capture device. A simple and easy way to correct is to take a standard color plate in the same spatial position where the palmprint image sample is collected, and then correct by comparing the color error of the color plate before and after shooting. Munsell (Munsell) color palette is based...

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Abstract

The invention discloses a texture haptic reproduction method based on image gray scale recovery shape technology. The method is characterized by comprising the following steps of 1, restoring a three-dimensional contour from a single image frame, performing color correction on acquisition equipment and acquiring color images in different angles by means of the acquisition equipment, fusing the color images, restoring a photographed image by means of a color restoring method based on polynomial regression, processing the images in different angles for obtaining gray scale images, and fusing the gray scale images; establishing a light reflection model; establishing an equation according to the gray scale and the light reflection model, and calculating the height of each point on the surface, and establishing a virtual surface triangular mesh model; and 2, performing haptic rendering on the virtual surface by means of a texture haptic model. The texture haptic reproduction method reduces a color image aberration and improves real feeling in haptic reproduction.

Description

technical field [0001] The invention relates to a texture force tactile reproduction method, in particular to a texture force tactile reproduction method based on image gray scale recovery shape technology. Background technique [0002] With the application of virtual reality technology in surgical simulation, teleoperated robot control, virtual manufacturing and other fields, the importance of haptic information feedback for virtual operation is becoming more and more significant. In the virtual reality system, through the haptic reproduction device, the surface texture characteristics of the object can be fed back to the operator, which can enhance the operator's sense of immersion and help improve the perception and manipulation of virtual objects. [0003] In virtual reality, the tactile expression of texture force usually needs to extract the height profile feature of the texture surface, that is, to obtain the height information of the texture surface concavity and con...

Claims

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Application Information

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IPC IPC(8): G06T7/55G06T17/20G06T17/30G06T19/20
CPCG06T7/55G06T17/20G06T17/30G06T19/20G06T2210/28G06T2207/10004G06T2207/10024
Inventor 张小瑞吴韵清孙伟刘佳朱利丰宋爱国
Owner NANJING UNIV OF INFORMATION SCI & TECH
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