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An image parallel compression apparatus and method

A compression device and image technology, applied in the field of satellite remote sensing, can solve the problems of insufficient processing capability and low computational complexity of compression technology, and achieve the effects of improving real-time processing rate, reducing error probability, and being easy to implement.

Active Publication Date: 2018-12-18
XIAN INSTITUE OF SPACE RADIO TECH
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Problems solved by technology

[0004] The problem solved by the technology of the present invention is: to overcome the insufficient processing capacity of the existing compression technology, and to provide a parallel compression technology for remote sensing images based on pipeline, which has extremely low computational complexity and uses very few resources while providing compression functions , strong processing ability

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  • An image parallel compression apparatus and method

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Embodiment Construction

[0040] combine image 3 , the image parallel compression device of the present invention includes a top-level module, an image segmentation module, five receiving modules, a predictor module, an error calculation module, a quantization module, an encoding module and an output processing module;

[0041] The image segmentation module evenly divides the image data into k image blocks, where k is a multiple of 5, and after the clock arrives, sends one pixel of the mth image block to the m / 5th remainder receiving module; Add 1 to m every 5 clock cycles, add m-5 until all pixels of the five image blocks are sent, switch to the next five image blocks, and add m+5 until all image blocks are completed sending; k≥m≥1;

[0042]The five receiving modules send the pixels of the received image blocks to the FIFO for reading and storage, and send them to the predictor module. One receiving module sends pixels in each clock cycle, and the next cycle switches to the next receiving module for...

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Abstract

The invention relates to an image parallel compression device and a method. Image data is divided into multiple of 5 blocks, and after the arrival of a clock, one pixel of the m-th image block is sentto the remainder of m / 5 receiving modules . The predictor module transmits the original pixel value X and the predicted pixel value (shown in the description) to the error calculation module. The error calculation module calculates a difference between the original pixel value X and the predicted pixel value (shown in the description) and sends the difference to a quantization module. The quantization block calculates | Rc-Rb|+|Rc-Ra |, and quantizes and sends the quantized value to an encoding module. The encoding module encodes the quantized value and sends it to an overflow processing module. The output processing module judges whether overflow occurs in the quantization process, and outputs an encoding if no overflow occurs; and outputs encoding and overflow encoding if overflow occurs. The remote sensing image parallel compression method based on pipelining provided by the invention has the characteristics of less hardware overhead and high processing speed, strong applicability, easy engineering realization, stability and reliability, and obvious advantages in the application of the design method in the aerospace field.

Description

technical field [0001] The invention belongs to the technical field of satellite remote sensing, and relates to a parallel compression device and method based on flowing water. Background technique [0002] With the development of space-to-Earth observation technology, the amount of data to be transmitted on the satellite has increased sharply, which puts forward higher requirements for the compression ability of satellite images. Complicated algorithm implementation and limited hardware resources have become the main factors affecting the on-board compression processing capability. Static compression algorithms JEPG-LS, JPEG2000, especially complex video compression algorithms such as H.265 are even more critical to the processing capability of the hardware implementation. put forward higher requirements. [0003] At present, static image compression technologies used in the field of satellite remote sensing include JEPG-LS and JPEG2000. Due to the influence of the applica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/436H04N19/124H04N19/176
CPCH04N19/124H04N19/176H04N19/436
Inventor 韩宇肖化超张建华袁素春阎昆陈晨祡昱洲
Owner XIAN INSTITUE OF SPACE RADIO TECH
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