A method and device for determining a fitting boundary

A boundary, to-be-fitting technology, applied in the field of image processing, can solve problems such as misalignment, affecting image feature recognition algorithms, and reducing fitting accuracy.

Active Publication Date: 2021-01-01
SHENZHEN YIHUA COMP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the boundary line fit is not good, the image after rotation will appear such as black borders, misalignment, etc., which will affect the subsequent image feature recognition algorithm
[0003] The existing boundary line fitting scheme, for the case where the banknote has a folded angle or a large inclination angle, the boundary line fitting effect is not good, and if the horizontal and vertical resolutions of the deposit and withdrawal equipment are different, the acquired The inclination angle of the image of the object to be rotated is affected by the inconsistency of horizontal and vertical resolutions and cannot reflect the real inclination angle, so that the starting position and cut-off position of the fitting line cannot be accurately determined, resulting in some abnormalities during fitting. The points on the straight line boundary are added to the fitting operation, which reduces the fitting accuracy

Method used

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  • A method and device for determining a fitting boundary
  • A method and device for determining a fitting boundary
  • A method and device for determining a fitting boundary

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0108] Please refer to the attached figure 1 , is a schematic flowchart of a method for determining a fitting boundary provided in Embodiment 1 of the present invention. The method is applicable to the scene of banknote boundary fitting. and / or hardware implementation, and generally can be integrated in the device for determining the fitted boundary. The method specifically includes the following steps:

[0109] S110. Determine a circumscribing rectangle corresponding to the object to be rotated according to the contour point coordinates of the object to be rotated.

[0110] It should be noted that the contour points of the object to be rotated can be searched based on a chain code, or can be determined according to a method of linear search in the column or row direction, and the coordinates of the contour points can be obtained through calculation.

[0111] Specifically, refer to figure 2 , the object to be rotated is a rectangle, for example, it can be a banknote. Due t...

Embodiment 2

[0151] Please refer to the attached Figure 4 , is a schematic structural diagram of a device for determining a fitting boundary provided in Embodiment 2 of the present invention, and the device specifically includes the following modules:

[0152] Circumscribed rectangle determination module 21, for determining the circumscribed rectangle corresponding to the object to be rotated according to the contour point coordinates of the object to be rotated;

[0153] The block processing module 22 is configured to perform block processing on the circumscribed rectangle, and in each block, pre-screen out the first boundary block associated with the boundary to be fitted;

[0154] The interference block filtering module 23 is used to filter out the interference boundary blocks matching other boundaries in the first boundary block according to the coordinate characteristics of the boundary blocks corresponding to different boundaries, so as to form the target boundary block;

[0155] T...

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Abstract

The embodiment of the present invention discloses a method and device of determining a fitting boundary. The method comprises the steps of according to the contour point coordinate of a to-be-spun object, determining an external rectangle corresponding to the to-be-spun object; carrying out the block processing on the external rectangle, and pre-screening the first boundary blocks correlated with the to-be-fitted boundaries in the blocks; according to the coordinate characteristics of the boundary blocks corresponding to different boundaries, filtering the interference boundary blocks matching the other boundaries in the first boundary blocks to form the target boundary blocks; according to the target boundary blocks, determining the to-be-fitted boundaries. Based on the above method and the above device, the problem that a boundary linear fitting effect is not good when a break angle or an angle of inclination of the to-be-spun object is larger, can be solved, and the situation that an image of the to-be-spun object is not influenced by the inconsistent horizontal and vertical resolution ratios of an image acquisition device during a boundary linear fitting process, can be guaranteed, the boundary linear fitting precision is improved, and a higher reliability is realized.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of image processing, and in particular to a method and device for determining a fitting boundary. Background technique [0002] When the cash deposit and withdrawal device performs the deposit and withdrawal business, for the identification of banknotes, it is first necessary to perform a rotation operation on the banknotes, and the rotation operation is based on the straight line fitting of the banknote boundaries. The quality of boundary line fitting directly affects the quality of the image after rotation. If the boundary line fit is not good, the image after rotation will appear such as black borders, misalignment, etc., which will affect the subsequent image feature recognition algorithm. [0003] The existing boundary line fitting scheme, for the situation where the banknote has a folded angle or a large inclination angle, the boundary line fitting effect is not good, and if ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T3/60
CPCG06T3/602
Inventor 李杰
Owner SHENZHEN YIHUA COMP
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