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

A method and apparatus of removing image noise

A technology of image noise and input image, which is applied in the field of image processing, can solve the problems of large memory resources, slow processing speed, large amount of data, etc., and achieve the effect of accelerating processing speed, reducing calculation amount, and saving storage space

Inactive Publication Date: 2007-05-30
VIMICRO CORP
View PDF0 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] Compared with spatial smoothing filtering, this multi-frame superposition filtering method can more effectively remove noise in the time direction of the image, but this method requires multiple memories to store image data of different frames, which takes up large memory resources. At the same time, due to the calculation problems involving N filter parameters and N frames of images, the amount of data to be processed is also large, and the processing speed is relatively slow.

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
  • A method and apparatus of removing image noise
  • A method and apparatus of removing image noise
  • A method and apparatus of removing image noise

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0030] The core idea of ​​the present invention is: receiving each input image signal with continuous time; multiplying the input image signal at the current moment by the filter coefficient, multiplying the output image signal after filtering at the previous moment by the difference of 1 minus the filter coefficient, and Adding the two multiplication results; outputting the addition result as a filtered image signal at the current moment.

[0031] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples.

[0032] FIG. 2 is a schematic structural diagram of a preferred embodiment of the device of the present invention. As shown in FIG. 2 , the device mainly includes a first multiplier 201 , a second multiplier 202 , a first adder 203 and a register 204 .

[0033] Wherein, the first multiplier 201 is used to calculate t...

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

This invention discloses one method to remove image noise, which comprises the following steps: receiving time continuous input image signals; multiplying current time image signal with filter parameters with front time filtered for output image signal with one minus filter parameters and summing up two results; using the results as current time filter image signal output.

Description

technical field [0001] The invention relates to image processing technology, in particular to a method and device for removing image noise. Background technique [0002] The most basic purpose of image preprocessing is to improve image quality and provide a good premise environment for further image processing. Removing image noise is an effective way to improve image quality. There are many reasons for the formation of noise, which may be generated during the imaging process or during the transmission process. For the noise formed by different reasons, there are different removal methods in image processing. Among them, the two most basic denoising methods are For spatial smoothing filtering and temporal smoothing filtering. [0003] Spatial smoothing filtering is to filter a single image, the most commonly used method is low-pass filtering, low-pass filtering is a linear signal processing method, using simple neighborhood averaging to reduce noise, that is, using the gray...

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): H04N5/21H04N5/213
Inventor 沈操王浩
Owner VIMICRO CORP