Compression of quincunx subbands

Nalon, J.A.; Yabu-uti, João Baptista Tadanobu

doi:10.1109/sibgra.2002.1167163

Cited by 2 publications

(4 citation statements)

References 12 publications

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“…According to (4) and Fig. 1, the conditions of perfect reconstruction for a quincunx filter bank, are given by [2][10]…”

Section: Filter Design Of Quincunx Waveletmentioning

confidence: 99%

“…To solve these equations and get relations among the four quincunx filters, a method by quadrature mirror filters (QMF) is mentioned in [2] as…”

Section: Filter Design Of Quincunx Waveletmentioning

confidence: 99%

“…In [2], these coefficients are arranged in a symmetrical way and make up the lowpass analysis filter of quincunx wavelet. After that, according to (6), the rest three filters can be easily obtained.…”

Section: Filter Design Of Quincunx Waveletmentioning

confidence: 99%

“…Since spatial frequencies to which human eye is most sensitive are located in the frequency axes, quincunx subbands preserve information that is most relevant to the human eye [2] . As a powerful tool of wavelet transform, lifting scheme is widely applied in the field of image compression with quincunx sampling [4]- [8] .…”

Section: Introductionmentioning

confidence: 99%

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Embedded Zerotree Wavelet Based Image Coding via Quincunx Lifting

Lü

Zhan

2008

2008 Congress on Image and Signal Processing

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This paper proposes a simple and symmetrical scheme for the prediction and update operators in quincunx lifting, which is then applied into image coding based on Embedded Zerotree Wavelet (EZW) algorithm. In addition, we present a new strategy for taking quantization threshold by combining the power of 2 with the square of integer. The former is used for image coding at higher bit rates and the latter at lower bit rates. The experimental results demonstrate that the proposed method can improve the quality of the reconstructed image.

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“…According to (4) and Fig. 1, the conditions of perfect reconstruction for a quincunx filter bank, are given by [2][10]…”

Section: Filter Design Of Quincunx Waveletmentioning

confidence: 99%

“…To solve these equations and get relations among the four quincunx filters, a method by quadrature mirror filters (QMF) is mentioned in [2] as…”

Section: Filter Design Of Quincunx Waveletmentioning

confidence: 99%

Section: Filter Design Of Quincunx Waveletmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Embedded Zerotree Wavelet Based Image Coding via Quincunx Lifting

Lü

Zhan

2008

2008 Congress on Image and Signal Processing

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Revisiting Far/Near Infrared Pyramid-Based Fusion Types for Night Vision Using Matlab

Mahfooz¹,

Shah²

2015

Pakistan Journal of Engineering, Technology & Science

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The night vision imaging mechanisms are developed to increase the visibility beyond normal human perception capabilities. So far, night vision methods reported in literature, such as, Morphological, Low Pass Pyramid, Contrast Pyramid, Filter Subtract Decimate and Shift Invariant methods, the Laplacian fusion method has been rated, the best method [1][2]. In this research paper four different methods of fusion of images, Gradient, Wavelet, Quincuns Lifting, including Laplacian are processed using Matlab toolbox called Matifus for night vision. For comparing the results of processed images using above methods, Mean Opinion Score (MOS) is used. MOS result of Laplacian, wavelet, gradient and quincunx methods are compared. The MOS results on the scale of 1-5 indicate a score of 4.15 for Laplacian, that means the quality of image perceived by the scorers is rated between good and excellent. By using MOS and perceptually proving that Laplacian technique is better than all others for night vision systems. However Gradient scored 3.56, Wavelet scored 3.15 and lastly 2.22 was scored by Quincunx Lifting method.

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Compression of quincunx subbands

Cited by 2 publications

References 12 publications

Embedded Zerotree Wavelet Based Image Coding via Quincunx Lifting

Embedded Zerotree Wavelet Based Image Coding via Quincunx Lifting

Revisiting Far/Near Infrared Pyramid-Based Fusion Types for Night Vision Using Matlab

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