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This paper presents a novel way to reduce noise introduced or exacerbated by image enhancement methods, in particular algorithms based on the random spray sampling technique, but not only. According to the nature of sprays, output images of spray-based methods tend to exhibit noise with unknown statistical distribution. To avoid inappropriate assumptions on the statistical characteristics of noise, a different one is made. In fact, the non-enhanced image is considered to be either free of noise or affected by non-perceivable levels of noise. Taking advantage of the higher sensitivity of the human visual system to changes in brightness, the analysis can be limited to the luma channel of both the non-enhanced and enhanced image. Also, given the importance of directional content in human vision, the analysis is performed through the dual-tree complex wavelet transform , lanczos interpolator and edge preserving smoothing filters. Unlike the discrete wavelet transform, the DTWCT allows for distinction of data directionality in the transform space. For each level of the transform, the standard deviation of the non-enhanced image coefficients is computed across the six orientations of the DTWCT, then it is normalized. Keywords: dual-tree complex wavelet transform (DTWCT), lanczos interpolator, edge preserving smoothing filters.
Ijri ece-01-02 image enhancement aided denoising using dual tree complex wave...
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cnsg1021
En reconocimiento de los compromisos adquiridos de las empresas con el ADO y el ADOP, serán distinguidos con la medalla de bronce de la ROMD, entre otros destacados patrocinadores, Alejandro Oñoro (Ilunion), Antonio Brufau (Repsol), Antonio García (Fundación ACS), César Alierta (Telefónica), David Jiménez (Santalucía), Demetrio Carceller (Damm), Dimas Gimeno (El Corte Inglés), Enrique Huerta (Liberty), Ignacio Galán (Iberdrola), Marcos de Quintos (Coca-Cola), José Antonio Sánchez (RTVE), Inmaculada García (SELAE), Iñaki Ereño (Sanitas), Jean Paul Rignault (AXA), Jerome Boesch (Danone), Joan Sitges (Cofidis), Jordi Quirós (Decathlon), Jordi Gual (Caixa Bank), José Moya (Persan), José Álvarez (Unidental), Juan Manuel González (Siro), Luis Gallego (Iberia), Pablo Vázquez (Renfe), Rafael Fuertes (El Pozo), Simón Barceló (Barceló Viajes), Tomás Pascual (Calidad Pascual), Simón Valín (Norauto), Vicente Tarancón (Luanvi), y Vicente Tardía (Allianz Seguros).
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This is my presentation from Tech in Asia Jakarta Developer stage day 2 where I explain about what's under the hood and how we build our teams in 3 different cities.
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Contenu connexe
En vedette
Ramayana
Ramayana
Fabiana Souza
This paper presents a novel way to reduce noise introduced or exacerbated by image enhancement methods, in particular algorithms based on the random spray sampling technique, but not only. According to the nature of sprays, output images of spray-based methods tend to exhibit noise with unknown statistical distribution. To avoid inappropriate assumptions on the statistical characteristics of noise, a different one is made. In fact, the non-enhanced image is considered to be either free of noise or affected by non-perceivable levels of noise. Taking advantage of the higher sensitivity of the human visual system to changes in brightness, the analysis can be limited to the luma channel of both the non-enhanced and enhanced image. Also, given the importance of directional content in human vision, the analysis is performed through the dual-tree complex wavelet transform , lanczos interpolator and edge preserving smoothing filters. Unlike the discrete wavelet transform, the DTWCT allows for distinction of data directionality in the transform space. For each level of the transform, the standard deviation of the non-enhanced image coefficients is computed across the six orientations of the DTWCT, then it is normalized. Keywords: dual-tree complex wavelet transform (DTWCT), lanczos interpolator, edge preserving smoothing filters.
Ijri ece-01-02 image enhancement aided denoising using dual tree complex wave...
Ijri ece-01-02 image enhancement aided denoising using dual tree complex wave...
Ijripublishers Ijri
CÓMO PUBLICAR UNA ENTRADA EN EL BLOG CON VIDEO
CÓMO PUBLICAR UNA ENTRADA EN EL BLOG CON VIDEO
cnsg1021
En reconocimiento de los compromisos adquiridos de las empresas con el ADO y el ADOP, serán distinguidos con la medalla de bronce de la ROMD, entre otros destacados patrocinadores, Alejandro Oñoro (Ilunion), Antonio Brufau (Repsol), Antonio García (Fundación ACS), César Alierta (Telefónica), David Jiménez (Santalucía), Demetrio Carceller (Damm), Dimas Gimeno (El Corte Inglés), Enrique Huerta (Liberty), Ignacio Galán (Iberdrola), Marcos de Quintos (Coca-Cola), José Antonio Sánchez (RTVE), Inmaculada García (SELAE), Iñaki Ereño (Sanitas), Jean Paul Rignault (AXA), Jerome Boesch (Danone), Joan Sitges (Cofidis), Jordi Quirós (Decathlon), Jordi Gual (Caixa Bank), José Moya (Persan), José Álvarez (Unidental), Juan Manuel González (Siro), Luis Gallego (Iberia), Pablo Vázquez (Renfe), Rafael Fuertes (El Pozo), Simón Barceló (Barceló Viajes), Tomás Pascual (Calidad Pascual), Simón Valín (Norauto), Vicente Tarancón (Luanvi), y Vicente Tardía (Allianz Seguros).
La ROMD reconoce los méritos de todos los medallistas olímpicos y paralímpico...
La ROMD reconoce los méritos de todos los medallistas olímpicos y paralímpico...
José Pérez
Historia
Historia
Secundaria Tecnica Uno
Esto es sobre lo que trata un proceso económico principalmente
Procesos económicos
Procesos económicos
Moni Collazo Esteves
This is my presentation from Tech in Asia Jakarta Developer stage day 2 where I explain about what's under the hood and how we build our teams in 3 different cities.
Prism Product Demo and Under the Hood
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Ijri ece-01-02 image enhancement aided denoising using dual tree complex wave...
Ijri ece-01-02 image enhancement aided denoising using dual tree complex wave...
CÓMO PUBLICAR UNA ENTRADA EN EL BLOG CON VIDEO
CÓMO PUBLICAR UNA ENTRADA EN EL BLOG CON VIDEO
La ROMD reconoce los méritos de todos los medallistas olímpicos y paralímpico...
La ROMD reconoce los méritos de todos los medallistas olímpicos y paralímpico...
Historia
Historia
Procesos económicos
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Prism Product Demo and Under the Hood
Prism Product Demo and Under the Hood
Paseo sonoro
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PASEO SONORO CAMPUS UNIVERSITARIO MARIA
ZAMBRANO SEGOVIA
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TRABAJO REALIZADO POR RAQUEL
DEL PRISCO TICS APLICADAS A LA EDUCACIÓN MUSICAL 4º EDUCACIÓN MUSICAL. 2013/2014
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