Code checking method for multi-dimensional classification and recognition of shoe sole patterns
A multi-dimensional, pattern-based technology, applied in character and pattern recognition, instruments, calculations, etc., can solve problems such as small trace contrast, long time-consuming image correction, and heavy workload
Inactive Publication Date: 2020-06-12
重庆市公安局刑事警察总队
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Problems solved by technology
However, due to the many influences of the on-site shoe sole pattern on the medium, carrier, extraction technology, and trace forming process, the on-site shoe sole pattern photo has the characteristics of light spots, noise, small trace contrast, unevenness, even deformation, and overlapping, which seriously affects the binary image. The accuracy of the algorithm, and this problem is the objective performance of the sole pattern on the spot. The pre-image correction of the binary image algorithm takes a long time, the workload is heavy, and this problem cannot be completely avoided, so many technicians gradually give up using this type of system comparison. Turning to manually select the sole pattern, resulting in a lot of labor costs and low output
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[0190] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.
[0191] Such as figure 1 As shown, by observing the sole pattern of tens of thousands of unspecified shoe samples, it is found that the judgment of distinguishing the type of sole pattern is to score the eight-dimensional features between the inspection material and the sample, as shown in Figure 4 , the correlation calculation of some dimensions, the similarity values in the four directions are obtained, and integrated into the total similarity. 1 is the text comparison of the macroscopic features: including three dimensions of map a...
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The present invention proposes a code checking method for multi-dimensional classification and identification of shoe sole patterns, which includes the following steps: S1, after classifying the preset features of shoe sole pattern categories, defining pattern features; S2, shoe sole pattern Carry out image preprocessing, normalize the shoe sole pattern image to form normalized coordinates, and generate a map area under the normalized coordinates; S3, collect and generate a feature set T of all map areas; calculate the similarity of each dimension of the shoe sole pattern respectively degree; S4, sum up the similarity of each dimension of the sole pattern, and calculate the score of the summary dimension; S5, the target sole pattern with the highest similarity score of each dimension is an approximate sole pattern, and perform induction and merging.
Description
technical field [0001] The invention relates to the field of computer image recognition, in particular to a code checking method for multi-dimensional classification and recognition of shoe sole patterns. Background technique [0002] Shoe sole patterns (marks) are one of the most commonly encountered traces and physical evidence in case scene investigations, and play an important role in many investigative methods such as scene reconstruction, perpetrator characteristics analysis, and serial cases. In the public security criminal investigation work, searching and comparing massive shoe sole pattern pictures is the key technical difficulty of this technology. At present, the mainstream algorithm adopted in China is to compare the similarity of image data for image binarization conversion. However, due to the many influences of the on-site shoe sole pattern on the medium, carrier, extraction technology, and trace forming process, the on-site shoe sole pattern photo has the c...
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IPC IPC(8): G06F16/583G06K9/46G06K9/62
CPCG06F16/5838G06V10/44G06F18/22G06F18/24
Inventor 田攀李红卫王成忠但青松邓永强蒲红兵陆林峰
Owner 重庆市公安局刑事警察总队