Image transmission method and device for wireless three-dimensional scanner
A transmission method and scanner technology, applied in the field of computer vision, can solve problems such as affecting the efficiency of the scanner, low frame rate, affecting the experience of the handheld three-dimensional scanner, etc., so as to reduce the complexity of space and time, and reduce the loss of image accuracy. Effect
Pending Publication Date: 2020-09-15
ZG TECH CO LTD
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Problems solved by technology
The wireless 3D scanners produced and developed by some manufacturers basically use software methods to compress images losslessly to realize image acquisition, compression, transmission and decompression. The maximum compression ratio can only reach 1:16, and the compressed images are also very large. The wireless transmission bandwidth will become the bottleneck of data transmission, resulting in a low frame rate of wireless module transmission (30-40 frames), which is much lower than the image acquisition frame rate (60 frames), which affects the real-time scanning experience of the handheld 3D scanner
The compressed image transmission speed cannot meet the acquisition frequency requirements of the camera, which affects the efficiency of the scanner's real-time work
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[0041] The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.
[0042] The existing close-range photogrammetry method needs to transmit the real-time image data collected by the 3D scanner to the workstation for calculation to obtain the 3D point coordinates of the object.
[0043] Most of the existing 3D scanners are connected and work through wired methods, such as USB cable or wired network, connected with workstations, real-time transmission of image data and reception of workstation control commands. This wired connection method will cause a lot of inconvenience in actual use. For example, in the factory environment, the site environment is relatively poor (even extremely bad), the connecting wire is very prone to wear and tear, and the moving and pulling of the connecting w...
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The invention relates to an image transmission method and device for a wireless three-dimensional scanner, and the image transmission method comprises the steps: firstly carrying out the preprocessingof an image collected by the wireless three-dimensional scanner, and carrying out the fuzzy processing of a dark region according to the brightness of a pixel region and the distance of a relative highlight region; and then compressing and transmitting the preprocessed image. Before H.264 / H.265 video compression is carried out, the image is preprocessed, and fuzzy processing is carried out on a dark area according to the brightness of a pixel area and the distance of a relatively high-brightness area, and details of the dark area are reduced, so that the space and time complexity of the imageis reduced. Therefore, under the condition of the same compression ratio, the compressed image has more detail data of the highlight part, and the image precision loss is reduced.
Description
technical field [0001] The invention relates to the field of computer vision, in particular to a method and device for compressing and transmitting real-time images collected by a wireless three-dimensional scanner in close-range photogrammetry. Background technique [0002] Most of the existing 3D scanners are connected and work through wired methods, such as USB cable or wired network, connected with workstations, real-time transmission of image data and reception of workstation control commands. This wired connection method will cause a lot of inconvenience in actual use. For example, in the factory environment, the site environment is relatively poor (even extremely bad), the connecting wire is very prone to wear and tear, and the moving and pulling of the connecting wire is easy. Interference in the environment, etc., equipment disconnection and other problems occur, which seriously even affect the service life of the equipment. At the same time, the wired communicatio...
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IPC IPC(8): G06T5/20G06T5/00G06K9/62G06K9/32G06T9/00G08C17/02
CPCG06T5/20G06T9/00G08C17/02G06T2207/20032G06T2207/10012G06V10/25G06F18/24G06T5/94G06T5/73
Inventor 郑顺义周泽海成剑华王晓南刘庆龙
Owner ZG TECH CO LTD