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A circuit board image mosaic method based on clustering method to screen matching points

An image mosaic and circuit board technology, which is applied in graphics and image conversion, image data processing, instruments, etc., can solve the problem of poor image mosaic effect of circuit boards, and achieve the effect of improving the confusion of feature point matching, increasing the fineness, and increasing the number

Active Publication Date: 2022-06-28
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0007] Purpose of the invention: Aiming at the above-mentioned prior art, a circuit board image mosaic method based on clustering method to screen matching points is proposed to solve the problem of poor effect of circuit board image mosaic in the prior art

Method used

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  • A circuit board image mosaic method based on clustering method to screen matching points
  • A circuit board image mosaic method based on clustering method to screen matching points
  • A circuit board image mosaic method based on clustering method to screen matching points

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Embodiment Construction

[0047] The present invention will be further explained below in conjunction with the accompanying drawings.

[0048] like figure 1 As shown, a circuit board image stitching method for screening matching points based on clustering method includes the following steps:

[0049] S101: Obtain a large number of partial images of circuit boards with overlapping areas through a high-definition camera;

[0050] S102: Extract the SIFT feature points on the grayscale image of the circuit board, and use the fast nearest neighbor matching algorithm to match the feature points;

[0051] S103: Use quick sort to sort the matching points of the circuit board, and preliminarily screen out the matching points of the circuit board with better matching degree;

[0052] S104: Calculate the slope and distance between each pair of circuit board matching points, and use the K-means clustering method to screen the circuit board matching points;

[0053] S105: use the RANSAC algorithm to obtain the t...

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Abstract

The invention discloses a method for mosaicing circuit board images based on clustering method for screening matching points. A large number of partial images of circuit boards with overlapping regions are obtained through high-definition cameras; The adjacent matching algorithm is used to match the feature points; the circuit board matching points are sorted by quick sorting, and the circuit board matching points with better matching degree are preliminarily screened out; the slope and distance between each pair of circuit board matching points are calculated, and the K-means is used to gather The similar method is used to screen the matching points of the circuit board; the transformation matrix is ​​obtained by using the RANSAC algorithm; the input image is deformed and fused into the output image, and the splicing is completed to obtain an ultra-high-resolution global circuit board image. The invention screens out better matching points through the K-means clustering algorithm, reduces the influence of bad matching points on affine transformation, and improves the accuracy of circuit board image splicing.

Description

technical field [0001] The invention belongs to the technical field of image splicing, and particularly relates to a splicing technology for a large number of high-resolution images of circuit boards. Background technique [0002] Image stitching technology is widely used in practical scenes, such as remote sensing images, drone aerial photography, etc. Image stitching is a pioneering step to further understand images, and the quality of the stitching effect directly affects the next work. At present, the widely used image stitching steps are divided into the following steps: first, preprocess each image; then extract feature points for each image and match the feature points; then perform image registration; then perform image copying; finally Perform image fusion to obtain the final image. [0003] Image preprocessing has a very important impact on the subsequent image stitching process. The quality of image preprocessing directly affects the result of image stitching. Cu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T3/40G06K9/62G06V10/75G06V10/762
CPCG06T3/4038G06V10/751G06F18/23213
Inventor 刘宁钟产世兵沈家全
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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