Method and apparatus for correcting image

Abstract

The invention provides an image rectification device, which includes an audio acquisition and processing unit for acquiring audio signals; a audio source identification unit for judging the direction of sound based on the audio signals collected by the audio acquisition and processing unit and for generating corresponding horizontal view angles; a image acquisition and processing unit for collecting a shot panoramic image; a image rectification unit for selecting the panoramic image collected by the image acquisition and processing unit based on the horizontal view angle generated by the audio source identification unit to implement the rectification on the window zone over the horizontal view angle and to obtain the planar image of the window zone; a compression and transmission unit for the compression and transmission of the planar images and the audio signals of the window zone of the image rectification unit. The device selects and rectifies an output image by the audio signal and does not need the output of the whole image, thus reducing the transmission of data under the circumstances of limited network bandwidth and ensuring the smoothness of the transmission of video conference images.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to an image correction method and an image correction device. Background technique [0002] With the continuous development of network technology, video conferencing has been rapidly popularized due to its advantages of high efficiency and low cost. Ordinary lenses that are widely used in video conferencing either can only take an overview of the entire venue, or require human control to shoot the speaking objects that need attention. Compared with ordinary lens camera devices, the fisheye camera undoubtedly has a wider field of view, and the visual horizontal viewing angle of the fisheye camera can reach 180 degrees. Therefore, all the scenes around the camera can be captured, and such an image can be called an omnidirectional image, also known as a fisheye image. However, although this type of fisheye camera has the advantages of large field of view and more image infor...

AI Technical Summary

Problems solved by technology

[0005] The disadvantage of the existing technology is that the corrected plane image of the fisheye image is relatively large, and the output data is also very large, so due to the limitation of the current network bandwidth, the corrected plane image is often not very smooth during video conference transmission

Moreover, for a fisheye camera placed on a table, it captures all the participants at the table, such as Figure 4 As shown, the fisheye camera captures all four people at the table. However, for video conferencing, viewers often only care about the person who is speaking. If there are many people at the table, the viewer often does not know who is present. Speaking, which affects the effect of video conferencing, and the user experience is poor

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