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

Rapid polarization demosaicing method based on polarization prior

A technology of demosaicing and mosaicking, applied in the field of image processing, can solve problems such as missing sensor data, and achieve the effect of fast and accurate demosaicing processing

Pending Publication Date: 2021-11-26
NORTHWESTERN POLYTECHNICAL UNIV
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a kind of fast polarization demosaic method based on polarization prior, to solve the problem that there is data missing in the sensor based on polarization filter array

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
  • Rapid polarization demosaicing method based on polarization prior
  • Rapid polarization demosaicing method based on polarization prior
  • Rapid polarization demosaicing method based on polarization prior

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0084] Such as figure 2 As shown, taking the restoration of the 0° channel as an example, the flow process of a polarization prior-based fast polarization demosaic method of the present invention is illustrated: the preliminary estimation result obtained through bilinear interpolation calculate Sparse difference image with the other three initially recovered channel values:

[0085]

[0086] where Δ 0,j Represents the sparse difference image between j channel and 0 channel, j represents three channels except 0 channel, j∈{45,90,135}.

[0087] For sparse (contains a large number of zero values) difference image Δ 0,j Perform bilinear interpolation to obtain the complete difference image Δ 0,j :

[0088]

[0089] where Δ 0,j Indicates the complete differential image, * indicates convolution, and the rightmost matrix of formula (12) is the convolution kernel.

[0090] The complete differential image obtained by the three channels Δ 0,j Initially estimate the imag...

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 discloses a rapid polarization demosaicing method based on polarization prior, which is used for acquiring a mosaic image of four polarization angles, and comprises the following steps: S1, for a channel to be recovered, estimating the channel to be recovered by using other three channels to obtain three estimated images of the channel to be recovered; and S2, carrying out weight fusion on the three estimated images: weighted 0, wherein j is a weight obtained according to polarization prior calculation, and under the condition that other channels are recovered, weighted i, j is determined by the following formula: S3, respectively repeating the steps S1 to S2 for each channel to be recovered, and finally obtaining four recovered polarization images, thereby solving the problem of data missing of the sensor based on the polarization filter array.

Description

technical field [0001] The invention belongs to the technical field of image processing, in particular to a polarization prior-based fast polarization demosaicing method. Background technique [0002] Polarization is one of the other essential properties of light besides color and intensity. Studies have shown that polarization parameters such as polarization angle and degree of polarization are very important for image processing such as specular reflection removal, image defogging, rain enhancement, and three-dimensional reconstruction. Vision applications have extremely high application value. In recent years, the development of sensors based on polarization filter arrays has greatly overcome the problems of complex systems and cumbersome operations in traditional polarization imaging methods. Sensors based on polarization filter arrays have the characteristics of compactness, non-moving parts and snapshot capture mode , capable of dynamic scene shooting and video captur...

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
Patent Type & Authority Applications(China)
IPC IPC(8): G06T3/40
CPCG06T3/4015G06T3/4007
Inventor 赵永强吴荣源李宁
Owner NORTHWESTERN POLYTECHNICAL UNIV