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

A method for reducing the vertical size of an image with a vertical filter

A size reduction and filter technology, applied in the field of image processing, can solve the problems of multiplier resource usage, area increase, design and implementation cost increase, etc., to save multiplier logic resources, reduce design and implementation costs, and achieve good image quality. Effect

Active Publication Date: 2017-09-15
TIANJIN JINHANG COMP TECH RES INST
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the implementation of real-time scaling filters for video images is mainly designed by FPGA or ASIC, while the traditional design method occupies a large number of line buffers and multiplier resources. These two types of resources cause FPGA logic resources and ASIC functions The direct factors of consumption and area increase have led to a significant increase in design and implementation costs, especially in the field of multi-channel video data parallel processing, resulting in huge cost consumption

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 for reducing the vertical size of an image with a vertical filter
  • A method for reducing the vertical size of an image with a vertical filter
  • A method for reducing the vertical size of an image with a vertical filter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The minimum vertical reduction ratio of the image of the vertical filter is 1 / 8 of the original size.

[0031] The first step is to determine the number of line buffers and selectors required by the vertical filter:

[0032] First, divide the range of [0,1] into three intervals (see image 3 ), and according to the principle of ensuring that all pixel data participate in filtering, each interval corresponds to a specific filtering order, which are:

[0033] ●Reduction ratio: SR 2 ~(1 / 2,1] corresponds to a filter order of 2;

[0034] ●Reduction ratio: SR 1 ~(1 / 4,1 / 2] corresponds to a filter order of 4;

[0035] ●Reduction ratio: SR 0 ~[0,1 / 4] corresponds to a filter order of 8;

[0036] min(LB_num 1 ) = tap_num 1 *max(SR 1 )=1*2=2;

[0037] min(LB_num 2 ) = tap_num 2 *max(SR 2 )=1 / 2*4=2;

[0038] min(LB_num 3) = tap_num 3 *max(SR 3 )=1 / 4*8=2;

[0039] Therefore, LB_num=max(min(LB_num 1 ), min(LB_num 2 ), min(LB_num 3 ))=2.

[0040] It can be seen th...

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 an image vertical size reducing method for a vertical filter. The method concretely includes the following steps that (1), the number of row caches and the number of selectors needed by the vertical filter are determined; (2), the vertical filter is designed according to the number, determined in the step (1), of the row caches; (3), based on the vertical filter designed in the step (2), data transmission with the image vertical size reduced is carried out. On the premise of ensuring image reduction quality, use of resources of the row caches is reduced significantly, and therefore the design cost of the image vertical filter is effectively controlled. The vertical filter structure can support reduction, in any proportion, of the image size in the vertical direction, when the reduction proportion is low, no image information is lost in filtering calculation, and good image quality can still be ensured.

Description

technical field [0001] The invention belongs to the field of image processing, in particular to a method for reducing the vertical size of an image using a vertical filter. Background technique [0002] Whether it is in static image processing or video image processing, image size scaling is a very important link, which is widely used in digital TV, video surveillance, satellite imaging and other fields. When reducing the size of the image in the vertical direction, it is generally done by using a certain order of low-pass filter to down-sample the pixel data of each column of the image. Video images are usually transmitted pixel by pixel in the order of row scanning, so the traditional downscaling method must pre-cache each row of pixel data required for vertical filtering, and then perform vertical filtering when the calculation conditions are met calculate. In order to maintain the quality of the reduced image after downsampling, the filter used needs to determine the n...

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 Patents(China)
IPC IPC(8): G06T3/40
Inventor 杨硕周津杨阳
Owner TIANJIN JINHANG COMP TECH RES INST
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