Unlock instant, AI-driven research and patent intelligence for your innovation.

Color multichannel double-frequency phase shift based machine-vision adaptive light supplement measurement method

A multi-channel, self-adaptive technology, applied in the field of adaptive optics, can solve the problems of reducing the number of projected images and color crosstalk

Inactive Publication Date: 2019-03-29
TIANJIN UNIV
View PDF8 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The present invention solves the problem of multi-frequency multi-acquisition and shooting by using the characteristics of color and multi-channel. On the basis of solving the problem of color crosstalk, it realizes single acquisition under multi-frequency conditions, reduces the number of projected images, and thus obtains faster calculation. Speed, high-quality pictures can be obtained on the basis of this method

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Color multichannel double-frequency phase shift based machine-vision adaptive light supplement measurement method
  • Color multichannel double-frequency phase shift based machine-vision adaptive light supplement measurement method
  • Color multichannel double-frequency phase shift based machine-vision adaptive light supplement measurement method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] The first step is to build a camera-projection system.

[0018] figure 1 is the camera-projection system of the present invention. Among them, point C is the entrance pupil of the camera, point P is the entrance pupil of the projector, the white wall is used as the reference plane, the distance between the camera and the projector is d, and the depth value of a point on the object relative to the reference plane is h, The distance of C and P to the reference plane is L, Δφ AB Represents the phase difference value of point O on the surface of the object relative to the reference plane.

[0019] The second step is to make phase shift fringes and obtain a reference image

[0020] According to the four-step phase shift method, four fringes with different phases need to be projected, such as figure 2 shown.

[0021] The third step is to obtain the distorted image.

[0022] A distorted image is obtained by projecting four-step phase-shifted fringes onto the object, and...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a color multichannel double-frequency phase shift based machine-vision adaptive light supplement measurement method. The method comprises that a camera-projector system is established; four-step phase-shift strips are made, and a reference image and a distortion image are obtained; depth information is obtained, wrapping phases of high and low frequency components are obtained, the phase is unpacked via double-frequency technology, the obtained unpacked phase is substituted into a phase and depth conversion relation to obtain the depth value of each pixel point, and the depth distribution map of the object surface is obtained; and adaptive light supplement is implemented, after that the high frequency component is filtered from the distortion image, an iteration manner is used to change the illumination intensity projected on the image surface by reducing the intensity of the high reflectivity part and increasing the intensity of the low reflectivity part, thenewly processed image is projected to the object surface by a projector, and collection, processing and iteration are continued till that the camera collects a clear image.

Description

technical field [0001] The invention belongs to the field of adaptive optics Background technique [0002] Computer vision is a technical means of judging the corresponding state of objects by acquiring pictures through image acquisition equipment. Therefore, the quality of the collected photos determines the accuracy of the judgment. Among them, the lighting system is an integral part of computer vision. When the lighting conditions are not good, clear images cannot be obtained. However, due to the different material structures on the surface of the object, the reflectivity of the surface of the object will be different. When there is a high reflectivity on the surface of the object, oversaturation will occur, resulting in the disappearance of object details in the image. On the contrary, when the reflectivity is low, the surface of the object will be dim and the object cannot be seen clearly. Therefore, adaptive lighting technology came into being. The necessary condition...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G01B11/25
CPCG01B11/2504G01B11/254
Inventor 吕辰刚戚皓高嘉乐
Owner TIANJIN UNIV