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1. |
Record Nr. |
UNIORUON00315391 |
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Autore |
ÁLVARES, Francisco |
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Titolo |
The Prester John of the Indies : a true relation of the lands of the Prester John being the narrative of the Portuguese embassy to Ethiopia in 1520 / written by Francisco Alvares ; the translation of Lord Stanley of Alderley (1881) ; revised and edited with additional material by C. F. Beckingham and G. W. B. Huntingford |
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Pubbl/distr/stampa |
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Cambridge, : published for the Hakluyt society at the University press, 1961 |
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Descrizione fisica |
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2 v. : ill. ; 23 cm + 1 c. geogr. in tasca. |
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Disciplina |
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Soggetti |
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ETIOPIA - Descrizioni e viaggi |
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Lingua di pubblicazione |
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Formato |
Materiale a stampa |
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Livello bibliografico |
Monografia |
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2. |
Record Nr. |
UNINA9910299830203321 |
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Autore |
Tan Ee-Leng |
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Titolo |
Perceptual Image Coding with Discrete Cosine Transform / / by Ee-Leng Tan, Woon-Seng Gan |
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Pubbl/distr/stampa |
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Singapore : , : Springer Singapore : , : Imprint : Springer, , 2015 |
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ISBN |
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Edizione |
[1st ed. 2015.] |
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Descrizione fisica |
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1 online resource (74 p.) |
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Collana |
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SpringerBriefs in Signal Processing, , 2196-4076 |
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Disciplina |
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004.0151 |
006.37 |
006.6 |
620 |
621.382 |
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Soggetti |
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Signal processing |
Image processing |
Speech processing systems |
Optical data processing |
Computer science—Mathematics |
Signal, Image and Speech Processing |
Image Processing and Computer Vision |
Discrete Mathematics in Computer Science |
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Lingua di pubblicazione |
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Formato |
Materiale a stampa |
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Livello bibliografico |
Monografia |
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Note generali |
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Description based upon print version of record. |
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Nota di contenuto |
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Introduction -- Computational Models for Just-Noticeable-Differences -- Perceptual Image Coding with Discrete Cosine Transform -- Validation of Computational Model for JND -- Concluding Remarks. |
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Sommario/riassunto |
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This book first introduces classic as well as recent computational models for just-noticeable-difference (JND) applications. Since the discrete cosine transform (DCT) is applied in many image and video standards (JPEG, MPEG-1/2/4, H.261/3), the book also includes a comprehensive survey of computational models for JND that are based on DCT. The visual factors used in these computational models are reviewed in detail. Further, an extensive comparative analysis of these models using quantitative and qualitative performance criteria is |
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presented, which compares the noise shaping performance of these models with subjective evaluation and the accuracy between the estimated JND thresholds and subjective evaluation. There are many surveys available on computational models for JND; however, these surveys seldom compare the performance of computational models that are based on DCT. The authors’ survey of the computational models and their in-depth review of the visual factors used in them will help readers understand perceptual image coding based on DCT. The book also provides a comparative analysis of several perceptual image coders that are based on DCT, which are compatible with the highly popular and widely adopted JPEG standard. |
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