A general compression method for multi-source heterogeneous UAV reconnaissance images

A compression method and unmanned aerial vehicle technology, applied in image communication, digital video signal modification, electrical components, etc., can solve the problems of poor intra-frame correlation, few pixels, and inter-frame correlation, that is, weak time correlation, etc., to achieve Eliminate blocking effects, highly targeted effects

Active Publication Date: 2015-11-18
北京北航天宇长鹰无人机科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] For multi-source and heterogeneous UAV reconnaissance images, its image compression modules are not compatible in terms of algorithms, data interface adaptation, etc.
In terms of image compression, UAV reconnaissance image data has both single-frame still images and multi-frame video images, while JPEG2000 can only compress static images, and H.264 compression standard uses DCT to restore images with obvious block effects ; and the reconnaissance targets (such as military vehicles, tanks, etc.) of interest in UAV images have fewer pixels, the intra-frame correlation is worse than ordinary images, and the inter-frame correlation, that is, the temporal correlation is not strong, and there is no such thing as H.264 standard An effective intra prediction method for this type of image

Method used

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  • A general compression method for multi-source heterogeneous UAV reconnaissance images
  • A general compression method for multi-source heterogeneous UAV reconnaissance images
  • A general compression method for multi-source heterogeneous UAV reconnaissance images

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0105] Hyperspectral image compression:

[0106] 1. Read in the hyperspectral image pic.bmp, 2320x1296, size 8809KB through the adapting interface, create a mapping and perform format conversion at the same time, output a yuv format file, the size is 4405KB;

[0107] 2. Divide the image into 16x16 blocks;

[0108] 3. Because it is a single frame of image information, only HEVCplanar intra-frame prediction is required for the image;

[0109] 4. Subtract the predicted value from the observed value to obtain a fast image residual, and perform 9 / 7DWT transformation and quantization on the image residual;

[0110] 5. Entropy coding the result in the previous step;

[0111] 6. Perform image quality evaluation, comprehensively use PSNR and SSIM evaluation criteria, PSNR and SSIM values ​​are shown in the figure below;

[0112] 7. The test.264 file is generated by x264 program encoding, the size is 230KB;

[0113] The running result is:

[0114] SSIM value is structural similarity: 0.9627731;

[011...

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Abstract

The invention discloses a multi-source special unmanned plane reconnoitered image general compression method, and belongs to the technical field of digital video image processing. Firstly, image video information is read through a port of a compression system and converted to a uniform format, and then an improved H264 video coding standard is used for compression coding of the information to obtain a compressed code stream. Aiming at the characteristics of multi-task-load and multi-mode work of an unmanned plane, the method can be used for compression work of video information, synthetic aperture radar (SAR) images and hyperspectral images collected by a forward looking infrared and other different devices, and after decompression, image source information is discernible, and the scheme is systematized.

Description

Technical field [0001] The invention belongs to the technical field of digital video image processing, and specifically relates to a universal compression method for multi-source heterogeneous UAV reconnaissance images. Background technique [0002] There are a lot of redundancies in the UAV reconnaissance image and video data. These redundancies include temporal redundancy, spatial redundancy, interspectral redundancy, statistical redundancy, and psychovisual redundancy. In order to facilitate the storage and transmission of data, they must be eliminated. The above redundancy is compressed. [0003] In the UAV system, the real-time transmission digital camera replaces the film aerial reconnaissance camera, the high-definition digital TV replaces the standard TV, the forward-looking infrared instrument, the multi-spectral, hyper-spectral image, and high-resolution, long-distance, multi-mode Synthetic Aperture Radar (SAR) of the United States has been applied on UAV platforms, so t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/61H04N19/503H04N19/587H04N19/124H04N19/13H04N19/176
Inventor 丁文锐康传波李红光鲁爱英
Owner 北京北航天宇长鹰无人机科技有限公司
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