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A stitching method and system for digitized x-ray images

A line image and image technology, applied in image data processing, graphic image conversion, instruments, etc., can solve the problems of low efficiency and long time-consuming stitching process, and achieve the effects of improving efficiency, reducing stitching time, and avoiding difficulties in feature point extraction

Active Publication Date: 2017-10-27
深圳市深图医学影像设备有限公司
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  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the embodiments of the present invention is to provide a digital X-ray image mosaic method, aiming at solving the problem of using feature point detection and matching to achieve image alignment in the digital X-ray image mosaic method provided by the prior art, so that the mosaic The problem of long process time and low efficiency

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  • A stitching method and system for digitized x-ray images
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  • A stitching method and system for digitized x-ray images

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Embodiment 1

[0047] Embodiment 1 of the present invention provides a splicing method of digitized X-ray images, such as figure 1 shown, including the following steps:

[0048] S1: Determine the stitching direction of the images according to the similarity of partial regions between the images in the input image sequence.

[0049] Further, as figure 2 As shown, step S1 may further include the following steps:

[0050] S101: Perform down-sampling processing on an input original image sequence to obtain a sampled image sequence.

[0051] In the present invention, in order to reduce the calculation amount of the subsequent image alignment process, it is necessary to perform down-sampling processing on the original image sequence, so as to reduce the size of the image to be processed subsequently and improve the processing speed.

[0052] Assume that the input original image sequence I={I containing n images 1 ,I 2 ,...,I n}, the corresponding image sequence after downsampling processing...

Embodiment 2

[0112] Embodiment 2 of the present invention provides a splicing method of digitized X-ray images, such as Figure 10 shown. Different from Embodiment 1, the following steps are also included between step S4 and step S5:

[0113] S6: Determine the effective overlapping area between adjacent images according to the pixel coordinates of each image in the image sequence in the same coordinate system, and perform exposure compensation on the image sequence.

[0114] Further, as Figure 11 As shown, step S6 comprises the following steps again:

[0115] S61: Determine an effective overlapping area between adjacent images according to the pixel coordinates of each image in the sampled image sequence in the same coordinate system.

[0116] S62: Calculate in turn the median value of the pixel intensity difference of the corresponding pixel in the effective overlapping area between adjacent images in the sampled image sequence.

[0117] S63: In the sampled image sequence and the ori...

Embodiment 3

[0121] Embodiment 3 of the present invention provides a mosaic system of digitized X-ray images, such as Figure 13 shown, including:

[0122] The splicing direction determination module 1 is used to determine the splicing direction of the images according to the similarity of the partial regions between the images in the input image sequence; the matching template determination module 2 is used to perform overlapping ranges between adjacent images in the image sequence The initial estimation is to determine the matching template; the spatial transformation matrix estimation module 3 is used to estimate the spatial transformation matrix between adjacent images in the image sequence according to the matching template; the alignment module 4 is used to calculate the global space of the image sequence according to the spatial transformation matrix transformation matrix, and use the global space transformation matrix to unify the pixel coordinates of each image in the image sequen...

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Abstract

The invention belongs to the technical field of medical imaging and provides a splicing method and system for digitized X-ray images. The method and system use template matching to achieve image alignment, which avoids the difficulties in feature point extraction, large amount of matching calculations, and easy matching failures that exist in the existing method of feature point detection and matching to achieve image alignment, and reduces digitalization. The splicing time of X-ray images improves the efficiency.

Description

technical field [0001] The invention belongs to the technical field of medical imaging, and in particular relates to a splicing method and system for digitized X-ray images. Background technique [0002] Currently, digital X-ray imaging equipment cannot directly obtain X-ray images of a patient's whole body or a large viewing angle range due to the constraints of the manufacturing process and size of the X-ray detectors. In order to solve the problem that the inspected part is much larger than the area of ​​the X-ray detector, in practice, it is often necessary to divide the inspected part into several shots, and then splicing the images with overlapping parts taken in batches according to certain rules to form a panorama, which is used for Diagnosis and surgical planning purposes. [0003] Generally, the mosaic process of digitized X-ray images can be divided into two main steps: image alignment and image fusion. Image alignment transforms images spatially by calculating ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T3/40
Inventor 饶玉明王益民
Owner 深圳市深图医学影像设备有限公司
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