Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Cubic spline-based infrared thermal image blind pixel compensation algorithm

A technology of blind element compensation and infrared heating, which is applied in image enhancement, image data processing, calculation, etc., can solve the problem of partial blurring of image details

Inactive Publication Date: 2010-12-08
SUN YAT SEN UNIV
View PDF2 Cites 20 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main advantage of this type of algorithm lies in its simple process and strong operability, but the methods currently used often blur the details of the image

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
  • Cubic spline-based infrared thermal image blind pixel compensation algorithm
  • Cubic spline-based infrared thermal image blind pixel compensation algorithm
  • Cubic spline-based infrared thermal image blind pixel compensation algorithm

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0085] (1) Blind element modeling

[0086] (1) Definition and classification of blind elements

[0087] Blind pixels include two types: dead pixels and abnormal response pixels.

[0088] A dead pixel refers to a pixel whose response rate is less than 1 / 10 of the average response rate. Its output signal does not change with the change of input radiation, and it appears as a bright or dark point on the original image.

[0089] The pixel with abnormal response refers to the pixel whose response value is 4 times higher than the average response value or lower than 1 / 4 of the average response value. Responsive outlier cells work fine, but cause large residual spatial noise if not replaced.

[0090] (2) Mathematical model of blind element

[0091] ① Pixel response rate

[0092] Assume that the detector (IRFPA) is an M×N infrared focal plane array. In an infrared focal plane array with a pixel responsivity R(i, j), under a certain frame period and a certain dynamic range, the ou...

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 cubic spline-based infrared thermal image blind pixel compensation algorithm, which comprises the following steps of: obtaining a blind pixel distribution map of an infrared thermal image by blind pixel detection; for each blind pixel point, constructing cubic splines of a row direction and a column direction in a way of taking coordinates of pixels in a row and a column where the blind pixel is in the infrared thermal image as interpolation nodes respectively, calculating interpolated values of the two cubic splines at the blind pixel point respectively, and taking a mean value of the two interpolated values as a primary compensation value of the blind pixel; after all the blind pixels in the infrared thermal image are subjected to the primary compensation, performing secondary compensation on the blind pixels; for each blind pixel point, constructing the cubic splines of the row direction and the column direction in a way of taking the coordinates of the pixels in the row and the column where the blind pixel is and the coordinates of the other blind pixels subjected to the primary compensation in the infrared thermal image as the interpolation nodes respectively, calculating the interpolated values of the two cubic splines at the blind pixel point respectively, and taking the mean value of the two interpolated values as a secondary compensation value of the blind pixel; and traversing all the blind pixels in the infrared thermal image to obtain the infrared thermal image subjected to the secondary blind pixel compensation.

Description

technical field [0001] The invention relates to the field of infrared thermal image processing, in particular to an algorithm research on a new blind element compensation mechanism based on infrared thermal images in an infrared focal plane thermal imaging system. Background technique [0002] At present, infrared focal plane array (IRFPA), as a new generation detector, has been widely used in many fields such as military, medical treatment, fire protection, transportation, electric power, construction, electronic manufacturing and petrochemical metallurgy. The imaging quality of the infrared thermal video dynamic imaging system composed of infrared focal plane array (IRFPA) has increasingly affected and restricted the development of related industries. Due to the limitation of the semiconductor manufacturing process level, it is inevitable that there will be some defects on the (IRFPA) device. Therefore, blind pixels (that is, bad pixels and abnormal response pixels) are g...

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): G06T5/00
Inventor 马争鸣童随兵肖颖王艳丽谭恒良
Owner SUN YAT SEN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com