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Image conversion method and device

An image conversion and image technology, which is applied in the field of computer communication, can solve the problems of slow image conversion speed, etc., and achieve the effect of reducing time consumption and improving speed and efficiency

Inactive Publication Date: 2014-03-05
GUANGDONG VTRON TECH CO LTD
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  • Claims
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Problems solved by technology

[0007] Based on this, it is necessary to provide an image conversion method and device for the above-mentioned problem of slow image conversion speed

Method used

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  • Image conversion method and device
  • Image conversion method and device

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Embodiment Construction

[0028] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0029] see figure 1 Shown, a kind of image conversion method comprises the following steps:

[0030] Step S101, performing entropy decoding and inverse quantization processing on the compressed code stream of the JPEG image to obtain a DCT coefficient matrix.

[0031] In this step, Huffman decoding and run-length decoding can be used to perform entropy decoding on the compressed code stream of the JPEG image; in addition, the dequantization process can be implemented using existing technologies, which will not be repeated here.

[0032] Step S102, reorganizing the DCT coefficient matrix to obtain...

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Abstract

The invention provides an image conversion method and device. The method comprises the steps that entropy decoding and inverse quantization processing are performed on compressed code streams of JPEG images to obtain DCT coefficient matrices; the DCT coefficient matrices are restructured to obtain wavelet packet coefficient matrices; inverted wavelet packet conversion processing is performed on the wavelet packet coefficient matrices to obtain wavelet coefficient matrices; wavelet coding is performed on the wavelet coefficient matrices to obtain wavelet compressed images. The image conversion method and device are capable of enhancing the speed and the efficiency of image conversion remarkably and shortening the time consumed in the image conversion process greatly, thereby being suitable for fast conversion between the large-batch JPEG images and the wavelet compressed images.

Description

technical field [0001] The invention relates to the field of computer communication, in particular to an image conversion method and an image conversion device. Background technique [0002] The JPEG standard, the first generation of still image compression coding widely used in the field of computer communication, was formulated in 1993 by the Joint Picture Experts Group. Due to the simplicity, low complexity, and few resources required for the implementation of the JPEG standard, it has been the mainstream technology of digital image compression and coding within 20 years after its creation, and has attracted the attention of all parties. [0003] However, with the rapid development of computer and multimedia technology and the increasing application range of image display, people hope that image codec technology can provide more image transmission and display performance. Image codec system should not only have excellent compression rate, but also The processing of compr...

Claims

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Application Information

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IPC IPC(8): H04N19/63
Inventor 甄海华
Owner GUANGDONG VTRON TECH CO LTD
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