Hyperspectral image compressed coding method through multivariate vector quantization

A technology of hyperspectral image and vector quantization, which is applied in the field of hyperspectral image compression and coding with multivariate vector quantization, and can solve the problems of image processing influence and image quality degradation.

Inactive Publication Date: 2014-03-19
HARBIN ENG UNIV
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Problems solved by technology

In the traditional vector quantization method, because the error is directly omitted, the compression will cause the degr

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  • Hyperspectral image compressed coding method through multivariate vector quantization
  • Hyperspectral image compressed coding method through multivariate vector quantization
  • Hyperspectral image compressed coding method through multivariate vector quantization

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Embodiment Construction

[0043] The present invention will be further described below in conjunction with the accompanying drawings.

[0044] A hyperspectral image compression encoding method for multiple vector quantization, comprising the following steps:

[0045] Step 1: Construct a quantization dictionary using the FCM algorithm;

[0046] Step 2: According to 2 kinds of multivariate vector quantization models and 3 kinds of dictionary atom selection strategies, use multiple regression to calculate the dictionary atoms and their coefficients used in the compression of each pixel;

[0047] Step 3: Compress and code the dictionary, dictionary atom numbers and coefficients respectively.

[0048] The Step 1 is process includes the following steps:

[0049] (1) Set the possible range of the number of clustering categories;

[0050] (2) After determining the number of clustering categories, cluster the hyperspectral image pixel spectrum and calculate its cost

[0051] (3) According to the size of the c...

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Abstract

The invention relates to a hyperspectral image compressed coding method, in particular a hyperspectral image compressed coding method through multivariate vector quantization. The hyperspectral image compressed coding method through the multivariate vector quantization comprises the steps of reading hyperspectral image data; constructing a compression dictionary: according to two multivariate vector quantitative models and dictionary atom selection strategies, calculating dictionary atoms and coefficients of the dictionary atoms used by compression of each of picture elements by means of multiple regression; performing compressing and coding. According to the method, the vector quantitative models are reconstructed, two multivariate vector quantitative models are provided, the omitted error information is less than that in the traditional vector quantitative method, coefficients of the selected dictionary atoms are not defined in the newly-provided multivariate vector quantitative models, values of the coefficients are calculated out according to a spectrum and the dictionary, therefore, quality of the reconstructed images is ensured, and image distortion caused by compressed coding is reduced.

Description

technical field [0001] The invention relates to a hyperspectral image compression encoding method, in particular to a multivariate vector quantization hyperspectral image compression encoding method. Background technique [0002] As an important research direction of hyperspectral image processing, hyperspectral image compression coding technology has long been widely concerned by experts, scholars and engineers from various countries, and has been widely used in agriculture, mineral exploration, military defense and other fields. Hyperspectral images can provide a large amount of ground detail information by using imaging and spectral techniques. It can reflect the characteristics of ground objects in hundreds of electromagnetic spectrum bands. However, with the continuous development of hyperspectral technology, people's requirements for hyperspectral images are gradually increasing, which results in the continuous expansion of spatial and spectral resolution and the numb...

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Application Information

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IPC IPC(8): G06T9/00
Inventor 赵春晖李晓慧赵艮平田明华朱海峰
Owner HARBIN ENG UNIV
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