Subjective assessment of display stream compression for stereoscopic imagery

Mohona, Sanjida Sharmin; Wilcox, Laurie M.; Allison, Robert S.

doi:10.1002/jsid.1002

Cited by 7 publications

(3 citation statements)

References 46 publications

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“…In other recent work, the flicker test was applied to a palette of different image modalities: High dynamic range (HDR) images [49], foveated images in head-mounted displays (HMD) [50], and stereoscopic imagery [51].…”

Section: B Boosting By the Image Flicker Methodsmentioning

confidence: 99%

Subjective Image Quality Assessment With Boosted Triplet Comparisons

Men¹,

Jenadeleh

Saupe

2021

IEEE Access

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In subjective full-reference image quality assessment, a reference image is distorted at increasing distortion levels. The differences between perceptual image qualities of the reference image and its distorted versions are evaluated, often using degradation category ratings (DCR). However, the DCR has been criticized since differences between rating categories on this ordinal scale might not be perceptually equidistant, and observers may have different understandings of the categories. Pair comparisons (PC) of distorted images, followed by Thurstonian reconstruction of scale values, overcomes these problems. In addition, PC is more sensitive than DCR, and it can provide scale values in fractional, just noticeable difference (JND) units that express a precise perceptional interpretation. Still, the comparison of images of nearly the same quality can be difficult. We introduce boosting techniques embedded in more general triplet comparisons (TC) that increase the sensitivity even more. Boosting amplifies the artefacts of distorted images, enlarges their visual representation by zooming, increases the visibility of the distortions by a flickering effect, or combines some of the above. Experimental results show the effectiveness of boosted TC for seven types of distortion (color diffusion, jitter, high sharpen, JPEG 2000 compression, lens blur, motion blur, multiplicative noise). For our study, we crowdsourced over 1.7 million responses to triplet questions. We give a detailed analysis of the data in terms of scale reconstructions, accuracy, detection rates, and sensitivity gain. Generally, boosting increases the discriminatory power and allows to reduce the number of subjective ratings without sacrificing the accuracy of the resulting relative image quality values. Our technique paves the way to fine-grained image quality datasets, allowing for more distortion levels, yet with high-quality subjective annotations. We also provide the details for Thurstonian scale reconstruction from TC and our annotated dataset, KonFiG-IQA, containing 10 source images, processed using 7 distortion types at 12 or even 30 levels, uniformly spaced over a span of 3 JND units.

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Section: B Boosting By the Image Flicker Methodsmentioning

confidence: 99%

Subjective Image Quality Assessment With Boosted Triplet Comparisons

Men¹,

Jenadeleh

Saupe

2021

IEEE Access

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“…Literature [19] analyzes the quality rendering software for animated movies given by the computer science teachers of Zhejiang University, through which the quality of the picture of animated movies can be improved, which promotes a stronger sense of the visual impact of animated movies. Literature [20] analyzed the high resolution of images in animated films for the requirements of display bandwidth, and animated films need to focus on the application of compression encoder in the pursuit of picture sophistication, prompting animated films to be more three-dimensional pictures. Literature [21] discusses the method of automatic generation of character animation in new media technology, and the method can realize the animation data mapping between multiple scenes, which promotes the innovative development of animated films.…”

Section: ) Animation Moviementioning

confidence: 99%

Audience-oriented Aesthetic and Creative Research on Animated Films Based on Visual Communication Design

Yan,

Jiang,

Wang

et al. 2023

Applied Mathematics and Nonlinear Sciences

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Animation movie conveys the connotation of animation to the audience through visual symbols, and the audience-oriented animation movie improves the aesthetic ability and diversifies the creative design. This paper starts with the analysis of visual communication design technology in animated films, analyzes the principle of visual communication design of animated images, and realizes the production of animated films by using multi-visual 3D animation modeling and texture rendering technology. The Sobel edge operator is introduced to optimize the image edge data of animated movies, so as to improve the image quality of animated movies. The development trend of visual communication design is discussed, and the aesthetic characteristics of visual communication design for animated films and the mutual influence between them are analyzed. In order to explore the aesthetic expression and creative design methods of animated films, quantitative analysis of data was conducted using current animated film works. The results show that the bit code rate in the full intra-frame coding mode of optimized production of animated images using visual communication technology is −1.87%, the highest quality factor is around 0.95, and the variation of smoothness is kept between 80% and 90%. Audience-oriented visual communication design of animated films should be based on the utility of information conveyance and rhythmic rhyme design and prompt the creative design of animated films through association, whimsy, metaphor, style and other ways.

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“…As the processing of stereoscopic 3D (S3D) images by the human visual system (HVS) differs from that for 2D images (4), the codecs' performance for S3D images is not predictable from 2D image performance. As there is no established protocol for the subjective evaluation of S3D images, a novel implementation of ISO 29170-2 was developed to evaluate both DSC and VDCM for S3D standard dynamic (5,6) and high dynamic range images (7).…”

Section: Objectives and Backgroundmentioning

confidence: 99%

75‐2: The Effect of Chromatic Aberration Correction on Visually Lossless Compression

Mohona

Wilcox

et al. 2022

Symp Digest of Tech Papers

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In augmented and virtual reality (AR/VR), magnifying display lenses typically introduce pincushion distortion and transverse chromatic aberration. These distortions are corrected by pre‐processing, one side‐effect of which is disruption of the spatial correlation between color channels. As a result, the standard practice of performing color space conversion prior to image compression may introduce undesirable, visible artefacts. To assess this, we evaluated the performance of two low impairment display stream codecs on distortion corrected stereoscopic images based on converting to YCoCg color space or bypassing the color conversion.

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Subjective assessment of display stream compression for stereoscopic imagery

Cited by 7 publications

References 46 publications

Subjective Image Quality Assessment With Boosted Triplet Comparisons

Subjective Image Quality Assessment With Boosted Triplet Comparisons

Audience-oriented Aesthetic and Creative Research on Animated Films Based on Visual Communication Design

75‐2: The Effect of Chromatic Aberration Correction on Visually Lossless Compression

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