A Psychovisual Threshold for Generating Quantization Process in Tchebichef Moment Image Compression

Ernawan, Ferda; Abu, Nur Azman; Suryana, Nanna

doi:10.4304/jcp.9.3.702-710

Cited by 3 publications

(1 citation statement)

References 16 publications

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“…TMT has been widely used in various image processing applications. For examples, they are used in image watermarking [5], image compression [6][7][8][9][10] and image dithering [11].…”

Section: Introductionmentioning

confidence: 99%

Psychovisual threshold on large Tchebichef moment for image compression

Azman¹,

Ernawan²

2014

ams

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JPEG standard transforms an 8×8 image pixel into a frequency domain. The discontinuities of the intensity image between adjacent image blocks cause the visual artifacts due to inter-block correlations in image reconstruction. The blocking artifacts appear by the pixel intensity value discontinuities which occur along block boundaries. This research proposes the psychovisual threshold on large Tchebichef moment to minimize the blocking artifacts. The psychovisual threshold is practically the best measure for the optimal amount of frequency image signals in the image coding. The psychovisual threshold is a basic element prior to generating quantization tables in image compression. The psychovisual threshold on the large Tchebichef moments has given significant improvements in the quality of image output. The experimental results show that the smooth psychovisual threshold on the large discrete Tchebichef moment produces high quality image output and largely free of any visual artifacts.

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“…TMT has been widely used in various image processing applications. For examples, they are used in image watermarking [5], image compression [6][7][8][9][10] and image dithering [11].…”

Section: Introductionmentioning

confidence: 99%

Psychovisual threshold on large Tchebichef moment for image compression

Azman¹,

Ernawan²

2014

ams

Self Cite

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Register Pre-Allocation based Folded Discrete Tchebichef Transformation Technique for Image Compression

Kiruba¹,

Sumathy²

2018

Integration

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A Novel Psychovisual Threshold on Large DCT for Image Compression

Abu

Ernawan

2015

The Scientific World Journal

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A psychovisual experiment prescribes the quantization values in image compression. The quantization process is used as a threshold of the human visual system tolerance to reduce the amount of encoded transform coefficients. It is very challenging to generate an optimal quantization value based on the contribution of the transform coefficient at each frequency order. The psychovisual threshold represents the sensitivity of the human visual perception at each frequency order to the image reconstruction. An ideal contribution of the transform at each frequency order will be the primitive of the psychovisual threshold in image compression. This research study proposes a psychovisual threshold on the large discrete cosine transform (DCT) image block which will be used to automatically generate the much needed quantization tables. The proposed psychovisual threshold will be used to prescribe the quantization values at each frequency order. The psychovisual threshold on the large image block provides significant improvement in the quality of output images. The experimental results on large quantization tables from psychovisual threshold produce largely free artifacts in the visual output image. Besides, the experimental results show that the concept of psychovisual threshold produces better quality image at the higher compression rate than JPEG image compression.

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A Psychovisual Threshold for Generating Quantization Process in Tchebichef Moment Image Compression

Cited by 3 publications

References 16 publications

Psychovisual threshold on large Tchebichef moment for image compression

Psychovisual threshold on large Tchebichef moment for image compression

Register Pre-Allocation based Folded Discrete Tchebichef Transformation Technique for Image Compression

A Novel Psychovisual Threshold on Large DCT for Image Compression

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