PL434579A1 - System and method for processing images, in particular in devices for acquisition, processing and storage or transmission of images using digital image compression using the discrete wavelet transformation (DWT) and entropy coding - Google Patents
System and method for processing images, in particular in devices for acquisition, processing and storage or transmission of images using digital image compression using the discrete wavelet transformation (DWT) and entropy codingInfo
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- PL434579A1 PL434579A1 PL434579A PL43457920A PL434579A1 PL 434579 A1 PL434579 A1 PL 434579A1 PL 434579 A PL434579 A PL 434579A PL 43457920 A PL43457920 A PL 43457920A PL 434579 A1 PL434579 A1 PL 434579A1
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- subband
- samples
- difference
- dwt
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- 230000005540 biological transmission Effects 0.000 title abstract 3
- 230000006835 compression Effects 0.000 title abstract 3
- 238000007906 compression Methods 0.000 title abstract 3
- 230000009466 transformation Effects 0.000 title abstract 3
- 238000000034 method Methods 0.000 title abstract 2
- 230000001131 transforming effect Effects 0.000 abstract 2
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- Compression Or Coding Systems Of Tv Signals (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
Abstract
System hybrydowego przetwarzania obrazów zwłaszcza w urządzeniach akwizycji, przetwarzania i składowania lub transmisji przeprowadzających kompresję obrazów cyfrowych z wykorzystaniem dyskretnej transformacji falkowej DWT i kodowania entropijnego, charakteryzuje się tym, że zawiera umieszczony w torze przetwarzania obrazu, po module DWT (3) dekomponującym obraz na podpasma a przed modułem kodowania entropijnego (9) podpasm uzyskanych po module DWT (3), moduł predykcji warunkowej (7) transformujący wybrane podpasma uzyskane po module DWT (3) do postaci ich sygnałów różnicowych, przy czym w sygnale różnicowym danego podpasma próbki tego podpasma są transformowane do postaci próbek różnicowych, przy czym próbkę różnicową wyznacza się dla danej próbki podpasma jako różnicę pomiędzy rzeczywistą wartością tej próbki podpasma a jej wartością przewidywaną z użyciem predyktora wybranego dla wszystkich próbek danego podpasma łącznie z przynajmniej dwóch predyktorów kandydujących, a przewidywanie wartości próbki danego podpasma korzystnie predyktor przeprowadza wyłącznie na podstawie już przetransformowanych próbek tego podpasma. Sposób hybrydowego przetwarzania obrazów zwłaszcza w urządzeniach akwizycji, przetwarzania i składowania lub transmisji przeprowadzających kompresję obrazów cyfrowych z wykorzystaniem dyskretnej transformacji falkowej DWT i kodowania entropijnego, polega na tym, że przed przeprowadzeniem kodowania entropijnego podpasm otrzymanych po DWT transformuje się wybrane podpasma otrzymane po DWT do postaci ich sygnałów różnicowych, przy czym w sygnale różnicowym danego podpasma próbki tego podpasma są transformowane do postaci próbek różnicowych, przy czym próbkę różnicową wyznacza się dla danej próbki podpasma jako różnicę pomiędzy rzeczywistą wartością tej próbki podpasma a jej wartością przewidywaną z użyciem predyktora wybranego dla wszystkich próbek danego podpasma łącznie z przynajmniej dwóch predyktorów kandydujących, a przewidywanie wartości próbki korzystnie przeprowadza się na podstawie już przetransformowanych próbek.The hybrid image processing system, especially in acquisition, processing and storage or transmission devices that perform digital image compression using the discrete DWT wavelet transformation and entropy coding, is characterized by the fact that it contains located in the image processing path, after the DWT module (3) decomposing the image into subbands and before the entropy coding module (9) of the subbands obtained after the DWT module (3), the conditional prediction module (7) transforming the selected subbands obtained after the DWT module (3) into their difference signals, where in the difference signal of a given subband the samples of this subband are transformed into difference samples, the difference sample being determined for a given subband sample as the difference between the actual value of that subband sample and its predicted value using the predictor selected for all samples of the given subband including at least two candidate predictors, and the prediction the sample values of a given subband are preferably performed by the predictor solely on the basis of already transformed samples of this subband. The method of hybrid image processing, especially in acquisition, processing and storage or transmission devices that perform digital image compression using the discrete DWT wavelet transformation and entropy coding, consists in transforming selected subbands obtained after DWT into the form of their differential signals, where in the difference signal of a given subband samples of this subband are transformed into the form of difference samples, the difference sample being determined for a given subband sample as the difference between the actual value of this subband sample and its predicted value using the predictor selected for all samples of a given subband together of at least two candidate predictors, and sample value prediction is preferably made on the basis of already transformed samples.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL434579A PL242013B1 (en) | 2020-07-07 | 2020-07-07 | System and method for processing images, in particular in devices for acquisition, processing and storage or transmission of images using digital image compression using the discrete wavelet transformation (DWT) and entropy coding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL434579A PL242013B1 (en) | 2020-07-07 | 2020-07-07 | System and method for processing images, in particular in devices for acquisition, processing and storage or transmission of images using digital image compression using the discrete wavelet transformation (DWT) and entropy coding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| PL434579A1 true PL434579A1 (en) | 2022-01-10 |
| PL242013B1 PL242013B1 (en) | 2023-01-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PL434579A PL242013B1 (en) | 2020-07-07 | 2020-07-07 | System and method for processing images, in particular in devices for acquisition, processing and storage or transmission of images using digital image compression using the discrete wavelet transformation (DWT) and entropy coding |
Country Status (1)
| Country | Link |
|---|---|
| PL (1) | PL242013B1 (en) |
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2020
- 2020-07-07 PL PL434579A patent/PL242013B1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| PL242013B1 (en) | 2023-01-09 |
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