• Log-hybrid architecture for to...

Treffer: Log-hybrid architecture for tonal correction combined with modified un-sharp masking filter algorithm for colour image enhancement

Title:
Log-hybrid architecture for tonal correction combined with modified un-sharp masking filter algorithm for colour image enhancement
Authors:
NNOLIM, Uche A
Source:
Integration (Amsterdam). 48:221-229
Publisher Information:
Amsterdam: Elsevier, 2015.
Publication Year:
2015
Physical Description:
print, 25 ref
Original Material:
INIST-CNRS
Subject Terms:
Electronics, Electronique, Sciences exactes et technologie, Exact sciences and technology, Sciences appliquees, Applied sciences, Electronique, Electronics, Electronique des semiconducteurs. Microélectronique. Optoélectronique. Dispositifs à l'état solide, Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices, Circuits intégrés, Integrated circuits, Conception. Technologies. Analyse fonctionnement. Essais, Design. Technologies. Operation analysis. Testing, Circuits électriques, optiques et optoélectroniques, Electric, optical and optoelectronic circuits, Propriétés des circuits, Circuit properties, Circuits électroniques, Electronic circuits, Circuits numériques, Digital circuits, Circuit arithmétique, Arithmetic circuit, Circuito aritmético, Algorithme, Algorithm, Algoritmo, Circuit intégré, Integrated circuit, Circuito integrado, Circuit multiplicateur, Multiplying circuits, Contraste image, Image contrast, Imagen contraste, Diminution coût, Cost lowering, Reducción costes, Echelle gris, Gray scale, Escala gris, Haute fréquence, High frequency, Alta frecuencia, Implémentation, Implementation, Implementación, Logiciel, Software, Logicial, Masquage, Masking, Enmascaramiento, Qualité image, Image quality, Calidad imagen, Réseau porte programmable, Field programmable gate array, Red puerta programable, Traitement image, Image processing, Procesamiento imagen, Contrast enhancement, Logarithmic image processing, Multiplierless log-hybrid low-complexity hardware architecture
Document Type:
Fachzeitschrift Article
File Description:
text
Language:
English
Author Affiliations:
Department of Electronic Engineering, University of Nigeria, Nsukka, Enugu, Nigeria
ISSN:
0167-9260
Access URL:
http://pascal-francis.inist.fr/vibad/index.php?action=search&terms=28891145
Rights:
Copyright 2015 INIST-CNRS
CC BY 4.0
Sauf mention contraire ci-dessus, le contenu de cette notice bibliographique peut être utilisé dans le cadre d’une licence CC BY 4.0 Inist-CNRS / Unless otherwise stated above, the content of this bibliographic record may be used under a CC BY 4.0 licence by Inist-CNRS / A menos que se haya señalado antes, el contenido de este registro bibliográfico puede ser utilizado al amparo de una licencia CC BY 4.0 Inist-CNRS
Notes:
Electronics
Accession Number:
edscal.28891145
Database:
PASCAL Archive

Weitere Informationen

A novel colour image enhancement architecture combining a Tonal Correction algorithm and a high frequency emphasis circular symmetric filter is implemented in hardware forming a colour image contrast enhancement system of low complexity. The architecture utilizes efficient log-domain calculations, resulting in multiplier-less operations and eliminates costly hardware division. Furthermore, the modularity of the fundamental design enables its ease of incorporation into larger and more complex designs with little modification. The design can be used for both grayscale and RGB colour images by processing each channel individually and the system can serve as a post enhancement module for improved colour rendition. The unit can be configured for the enhancement of over-exposed (too bright) and under-exposed (too dark) images based on adjustable parameters. The architecture easily fits on a basic Spartan III FPGA for low-cost realization evaluation and a Virtex 5 ML505 for real-time use. Results of the implementation and simulation are provided and compared with the software version and show that the system produces images with improved colour contrast and rendition compared to well known image enhancement algorithms such as RGB colour Homomorphic filtering. It also performs better than the Homomorphic filter and the MSRCR for faded colour images. .