Subjective spatial frequency and picture quality estimating function I: Subjective spatial frequency.
نویسندگان
چکیده
منابع مشابه
Low-spatial-frequency channels and the spatial frequency-doubling illusion.
PURPOSE This study examined the number and nature of spatiotemporal channels in the region where the frequency-doubling (FD) illusion would be expected to occur at eight locations spanning the central 30 degrees of the visual field. METHODS The probability of seeing the FD illusion was examined in 17 subjects. Stimuli were presented at 5 octaves of low spatial frequencies, at each of seven fl...
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Image quality assessment (IQA) is a crucial technique in perceptual image/video coding, because it is not only a ruler for performance evaluation of coding algorithms but also a metric for ratio-distortion optimization in coding. In this paper, inspired by the fact that distortions of both global and local information influence the perceptual image quality, we propose a novel IQA method that in...
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Given the importance of lexical frequency for psycholinguistic research and the lack of comprehensive frequency data for sign languages, we collected subjective estimates of lexical frequency for 432 signs in American Sign Language (ASL). Our participants were 59 deaf signers who first began to acquire ASL at ages ranging from birth to 14 years old and who had a minimum of 10 years of experienc...
متن کاملSubjective frequency estimates for 2,938 monosyllabic words.
Subjective frequency estimates for large sample of monosyllabic English words were collected from 574 young adults (undergraduate students) and from a separate group of 1,590 adults of varying ages and educational backgrounds. Estimates from the latter group were collected via the internet. In addition, 90 healthy older adults provided estimates for a random sample of 480 of these words. All gr...
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Based on the Double Stimulus Continuous Quality Scale (DSCQS) test, described in Rec. ITU-R BT.500-10 the quality and acceptability of a Unique Material Identifier (UMID) watermarking scheme was assessed subjectively. Participants were shown reference and watermarked material and asked to rate the quality and acceptability on a subjective scale. Based on the difference in ratings between source...
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ژورنال
عنوان ژورنال: The Journal of the Institute of Television Engineers of Japan
سال: 1987
ISSN: 0386-6831,1884-9652
DOI: 10.3169/itej1978.41.1173