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Image stitching processing method and device

An image stitching and image technology, applied in the field of image processing, can solve problems such as failure to work properly, time-consuming scale-invariant feature transformation SIFT algorithm, etc.

Active Publication Date: 2020-08-07
ZHEJIANG DAHUA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The embodiment of the present invention provides an image fusion processing method and device to at least solve the problem that the scale-invariant feature transformation SIFT algorithm in the related art is relatively time-consuming, and the image to be stitched needs to have rich texture features, and some features are rare. area that does not work properly

Method used

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  • Image stitching processing method and device
  • Image stitching processing method and device
  • Image stitching processing method and device

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Experimental program
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Embodiment 1

[0137] The method embodiment provided in Embodiment 1 of the present application may be executed in a mobile terminal, a computer terminal, or a similar computing device. Taking running on a mobile terminal as an example, figure 1 It is a block diagram of the hardware structure of the mobile terminal of the image splicing processing method of the embodiment of the present invention, as figure 1 As shown, the mobile terminal 10 may include one or more ( figure 1 Only one is shown in the figure) a processor 102 (the processor 102 may include but not limited to a processing device such as a microprocessor MCU or a programmable logic device FPGA) and a memory 104 for storing data. Optionally, the above-mentioned mobile terminal also A transmission device 106 for communication functions as well as input and output devices 108 may be included. Those of ordinary skill in the art can understand that, figure 1 The shown structure is only for illustration, and does not limit the stru...

Embodiment 2

[0236] According to another embodiment of the present invention, an image mosaic processing device is also provided, image 3 is a block diagram of an image mosaic processing device according to an embodiment of the present invention, such as image 3 shown, including:

[0237] The first determining module 32 is configured to adjust the rotation angle of the dome camera in the horizontal direction under the target magnification, collect multiple images, and determine the target focal length corresponding to the target magnification, wherein the adjacent ones of the multiple images There are areas of overlap between the images;

[0238] The projection module 34 is configured to project the coordinate points of the multiple images onto a spherical surface according to the pre-established correspondence between the spherical coordinates of the multiple images and the world coordinates, wherein the spherical coordinates of the multiple images are related to the The corresponding...

Embodiment 3

[0296] Embodiments of the present invention also provide a computer-readable storage medium, in which a computer program is stored, wherein the computer program is set to execute the steps in any one of the above method embodiments when running.

[0297] Optionally, in this embodiment, the above-mentioned storage medium may be configured to store a computer program for performing the following steps:

[0298] S1. Adjust the rotation angle of the dome camera in the horizontal direction under the target magnification, collect multiple images, and determine the target focal length corresponding to the target magnification, wherein there is an overlapping area between adjacent images in the multiple images ;

[0299] S2. Project the coordinate points of the multiple images onto a spherical surface according to the pre-established correspondence between the ball camera coordinates and the world coordinates of the multiple images, wherein the correspondence between the ball camera c...

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Abstract

The invention provides an image stitching processing method and device. The method comprises the following steps: adjusting the rotation angle of a dome camera in a horizontal direction under a targetmultiplying power, collecting a plurality of images, and determining a target focal length corresponding to the target multiplying power; projecting the coordinate points of the plurality of images to a spherical surface; reversely projecting a part of pixels in the overlapped area on the spherical surface into the plurality of images, and determining a re-projection error between the adjacent images after reverse projection; adjusting the target focal length and the roll angle of the dome camera according to the reprojection error to obtain an adjusted focal length and an adjusted roll angle; and reversely projecting a projection point on the spherical surface into a plane according to the adjusted focal length and roll angle to obtain a stitched image of the plurality of images. The problems that in the prior art, a scale invariant feature transform (SIFT) algorithm is relatively time-consuming, the images to be stitched need to have rich texture features, and the images cannot worknormally in some areas with few features can be solved.

Description

technical field [0001] The present invention relates to the technical field of image processing, in particular to an image splicing processing method and device. Background technique [0002] Zoom pan-tilt camera (Pan-Tilt-Zoom, PTZ) can adjust the focus distance, attitude, etc. It has the characteristics of flexibility, large field of view, and strong adaptability to lighting conditions. It is widely used in the field of surveillance and security. [0003] As a technique to connect the relationship between 3D geometric positions and corresponding points in the image, camera calibration can be used for distortion correction, 3D reconstruction, etc. Classical camera calibration algorithms, such as Tsai's two-step calibration method [1], Zhang Zhengyou's plane calibration method [2], etc., these two types of research are mainly camera calibration with a fixed focal length, requiring high-precision stereo targets or planes Calibrate the plate, and then get more accurate calibr...

Claims

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Application Information

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IPC IPC(8): G06T3/00G06T7/73
CPCG06T7/73G06T3/08G06T3/06
Inventor 李超峰
Owner ZHEJIANG DAHUA TECH CO LTD
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