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Trademark graphic similarity comparison method

A graphic similarity and trademark technology, applied in special data processing applications, instruments, electrical digital data processing, etc., to achieve practical functions, low missed detection rate, and good robustness

Inactive Publication Date: 2018-11-27
南昌奇眸科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Now people study how to use computers and other electronic devices to search and match trademarks has become a hot issue in this field. People continue to try various computer algorithms and multimedia technologies to automatically retrieve trademark graphics. In the link of feature extraction and comparison A lot of experiments and improvements have been done, but there is room for improvement in the pre-processing link, and good pre-processing can often effectively reduce the amount of calculation, save costs and improve robustness

Method used

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  • Trademark graphic similarity comparison method
  • Trademark graphic similarity comparison method
  • Trademark graphic similarity comparison method

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0032] as attached figure 1 As shown, a method for comparing similarity of trademark graphics in this embodiment includes:

[0033] S101, input the picture to be checked and the commodity category information, and establish or retrieve the corresponding trademark graphic database;

[0034] S102, performing preprocessing on the image to be inspected to form an image of the trademark to be inspected;

[0035] S103, performing feature extraction on the image of the trademark to be inspected and the trademark in the trademark graphic database;

[0036] S104, performing feature matching on the feature extracted in S103 and the feature extracted in the trademark graphic database, to obtain a similar matching pair set;

[0037] S105, screening the matching pairs in S104, and sorting the screened results according to the order of similarity from high to low, to obtain the result picture sequence.

[0038] In this embodiment, the manner of the similarity of feature extraction in the...

Embodiment 2

[0040] In this embodiment 2, on the basis of embodiment 1, in the step S105, screening is performed based on the RANSAC algorithm to eliminate the wrong matching pairs, which helps to reduce the amount of redundant calculations caused by the wrong matching pairs, thereby improving efficiency and improving accuracy.

Embodiment 3

[0042] Present embodiment 3 makes a change on the basis of embodiment 2, and for the result picture sequence, specifically adopt the following methods to obtain:

[0043] At first, in S101, set up the database D={D that comprises N trademark images 1 ,D 2 ,...,D N}, input the trademark Q to be retrieved.

[0044] Then, multi-scale feature extraction is performed in S103,

[0045] 1. Customize the specifications and sliding steps of the multi-scale sliding window: set the input image I w×h , the multiple scale definitions of the sliding window are as attached figure 2 , (in this example, σ 1 = 0.8, σ 2 =0.6,σ 3 =0.4), the sliding step size parameter μ (in this embodiment, μ is taken as 0.1), the sliding window horizontal step size step x =wμ, vertical step size step y = hμ.

[0046] 2. According to the size of the multi-scale sliding window defined above, each sliding window is represented by image I w×hThe upper left corner is the starting point, according to the s...

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Abstract

The invention discloses a trademark graphic similarity comparison method. The trademark graphic similarity comparison method includes: firstly determining whether an image to be inspected meets an image specification requirement of a trademark registration application, and correspondingly adjusting the image to be inspected by performing image storage format converting, stretching, compression, enlargement, reduction, cutting, and rotation. The difference between the pre-processed image and the trademark graphic database in the image specification is greatly reduced, which facilitates featureextraction and comparison, further reduces the amount of calculation, and brings great convenience to subsequent steps; global inter-scale feature window matching, local similar region feature windowmatching and matching for using a spatial transformation model to filter the scale-space consistency are applied to graphics retrieval to form a efficient, convenient and accurate trademark graphic similarity comparison method. The trademark graphic similarity comparison method can perform trademark graphic retrieval, is fast in speed, is low in omission ratio, and is good in robustness.

Description

technical field [0001] The invention belongs to the technical field of trademark retrieval, and in particular relates to a method for comparing the similarity of trademark graphics. Background technique [0002] Trademarks are an indispensable factor in the commercial economy. The annual number of trademark applications reaches one million levels, and the trademark data reaches tens of millions. For such a large number of groups, if people judge or examine whether two trademarks are similar and how similar they are When it comes to judgment, it is all judged by human eyes and subjective consciousness. There is a lot of room for improvement and improvement in terms of the operation cycle and the objective stability of the results. [0003] Now people study how to use computers and other electronic devices to search and match trademarks has become a hot issue in this field. People continue to try various computer algorithms and multimedia technologies to automatically retrieve...

Claims

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Application Information

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IPC IPC(8): G06F17/30
Inventor 樊晓东李建圃
Owner 南昌奇眸科技有限公司
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