Near lossless coding of sparse histogram images based on zero-skip quantization

Minewaki, Sayaka; Iwahashi, Masahiro; Kobayashi, Hiroyuki; Yoshida, Taichi; Kiya, Hitoshi

doi:10.1007/s11042-017-5082-2

Cited by 11 publications

(5 citation statements)

References 39 publications

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“…For the residual layer, which consists of the residual data generated by subtracting the partially decoded base layer from the original HDR image, the coding procedure after color space conversion from RGB to YCbCr differs from the Part 8 method. The histogram of each color component of the color-converted residual data is quantized using ZS.Q [28]. The packed residual data are then compressed using an arbitrary lossless image encoder, such as JPEG 2000 or JPEG XR.…”

Section: Outline Of Proposed Methodsmentioning

confidence: 99%

“…To extend the histogram-packing technique to two-layer nearlossless coding for HDR images, we focused on ZS.Q [28]. ZS.Q takes into account not only histogram sparseness but also the effect of quantization under a near-lossless condition.…”

Section: Zero-skip Quantization For Residual Imagesmentioning

confidence: 99%

“…To avoid the limitation of the histogram packing technique, we used zero-skip quantization (ZS.Q), which is an extension of the histogram packing technique proposed for lossless compression, for achieving efficient near-lossless coding. ZS.Q is a technique for one-layer coding [28], so it has never been applied to two-layer near-lossless coding. Therefore, no two-layer near-lossless coding using histogram packing techniques has been compared with the JPEG XT Part 8 method.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Two-layer Near-lossless HDR Coding with Backward Compatibility to JPEG

Kobayashi,

Watanabe,

Kiya

2019

Preprint

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We propose an efficient two-layer near-lossless coding method using an extended histogram packing technique with backward compatibility to the legacy JPEG standard. The JPEG XT, which is the international standard to compress HDR images, adopts a two-layer coding method for backward compatibility to the legacy JPEG standard. However, there are two problems with this two-layer coding method. One is that it does not exhibit better near-lossless performance than other methods for HDR image compression with singlelayer structure. The other problem is that the determining the appropriate values of the coding parameters may be required for each input image to achieve good compression performance of near-lossless compression with the two-layer coding method of the JPEG XT. To solve these problems, we focus on a histogram-packing technique that takes into account the histogram sparseness of HDR images. We used zero-skip quantization, which is an extension of the histogrampacking technique proposed for lossless coding, for implementing the proposed near-lossless coding method. The experimental results indicate that the proposed method exhibits not only a better nearlossless compression performance than that of the two-layer coding method of the JPEG XT, but also there are no issue regarding the combination of parameter values without losing backward compatibility to the JPEG standard.

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Section: Outline Of Proposed Methodsmentioning

confidence: 99%

Section: Zero-skip Quantization For Residual Imagesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Two-layer Near-lossless HDR Coding with Backward Compatibility to JPEG

Kobayashi,

Watanabe,

Kiya

2019

Preprint

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“…Our research group proposed a novel two layer lossless HDR coding method using a histogram packing technique, which has the backward compatibility to JPEG, referred to as HP coder [9], [10]. The packing technique allows us to improve the performance of lossless compression for HDR images when images have the histogram sparseness [11], [12]. The HP coder was demonstrated to outperform the normative JPEG XT encoder.…”

Section: Introductionmentioning

confidence: 99%

Performance Evaluation of Two-layer lossless HDR Coding using Histogram Packing Technique under Various Tone-mapping Operators

Kobayashi

Kiya

2019

2019 IEEE 8th Global Conference on Consumer Electronics (GCCE)

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We proposed a lossless two-layer HDR coding method using a histogram packing technique. The proposed method was demonstrated to outperform the normative JPEG XT encoder, under the use of the default tone-mapping operator. However, the performance under various tone-mapping operators has not been discussed. In this paper, we aim to compare the performance of the proposed method with that of the JPEG XT encoder under the use of various tone-mapping operators to clearly show the characteristic difference between them.

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“…In Refs. [11,12,[22][23][24][25][26][27][28][29][30], the sparseness of a histogram of an image is used for efficient compression. 'Sparse' histogram means that not all the bins in a histogram are utilized.…”

Section: Introductionmentioning

confidence: 99%

Two-Layer Lossless HDR Coding Using Histogram Packing Technique with Backward Compatibility to JPEG

Watanabe

Kobayashi

Kiya

2018

IEICE Trans. Fundamentals

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An efficient two-layer coding method using the histogram packing technique with the backward compatibility to the legacy JPEG is proposed in this paper. The JPEG XT, which is the international standard to compress HDR images, adopts two-layer coding scheme for backward compatibility to the legacy JPEG. However, this two-layer coding structure does not give better lossless performance than the other existing methods for HDR image compression with single-layer structure. Moreover, the lossless compression of the JPEG XT has a problem on determination of the coding parameters; The lossless performance is affected by the input images and/or the parameter values. That is, finding appropriate combination of the values is necessary to achieve good lossless performance. It is firstly pointed out that the histogram packing technique considering the histogram sparseness of HDR images is able to improve the performance of lossless compression. Then, a novel two-layer coding with the histogram packing technique and an additional lossless encoder is proposed. The experimental results demonstrate that not only the proposed method has a better lossless compression performance than that of the JPEG XT, but also there is no need to determine image-dependent parameter values for good compression performance without losing the backward compatibility to the well known legacy JPEG standard.

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Near lossless coding of sparse histogram images based on zero-skip quantization

Cited by 11 publications

References 39 publications

Two-layer Near-lossless HDR Coding with Backward Compatibility to JPEG

Two-layer Near-lossless HDR Coding with Backward Compatibility to JPEG

Performance Evaluation of Two-layer lossless HDR Coding using Histogram Packing Technique under Various Tone-mapping Operators

Two-Layer Lossless HDR Coding Using Histogram Packing Technique with Backward Compatibility to JPEG

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