Proceedings ArticleDOI
Internal noise-induced contrast enhancement of dark images
Rajib Kumar Jha,Rajlaxmi Chouhan,Prabir Kumar Biswas,Kiyoharu Aizawa +3 more
- pp 973-976
TLDR
The proposed contrast enhancement technique using scaling of internal noise of a dark image in discrete cosine transform (DCT) domain adopts a local adaptive processing and significantly enhances the image contrast and color information while ascertaining good perceptual quality.Abstract:
A contrast enhancement technique using scaling of internal noise of a dark image in discrete cosine transform (DCT) domain has been proposed in this paper. The mechanism of enhancement is attributed to noise-induced transition of DCT coefficients from a poor state to an enhanced state. This transition is effected by the internal noise present due to lack of sufficient illumination and can be modeled by a general bistable system exhibiting dynamic stochastic resonance. The proposed technique adopts a local adaptive processing and significantly enhances the image contrast and color information while ascertaining good perceptual quality. When compared with the existing enhancement techniques such as adaptive histogram equalization, gamma correction, single-scale retinex, multi-scale retinex, modified high-pass filtering, multi-contrast enhancement, multi-contrast enhancement with dynamic range compression, color enhancement by scaling, edge-preserving multi-scale decomposition and automatic controls of popular imaging tool, the proposed technique gives remarkable performance in terms of relative contrast enhancement, colorfulness and visual quality of enhanced image.read more
Citations
More filters
Journal ArticleDOI
Dynamic stochastic resonance-based grayscale logo extraction in hybrid SVD-DCT domain
Rajib Kumar Jha,Rajlaxmi Chouhan +1 more
TL;DR: A novel dynamic stochastic resonance (DSR)-based technique for robust extraction of a grayscale logo from a tampered watermarked image and suggests that remarkable improvement of robustness is achieved by using DSR on singular values of DCT.
Journal ArticleDOI
Dark and low-contrast image enhancement using dynamic stochastic resonance in discrete cosine transform domain
TL;DR: A novel technique based on dynamic stochastic resonance in discrete cosine transform (DCT) domain has been proposed in this paper for the enhancement of dark as well as low-contrast images and gives remarkable performance in terms of contrast and color enhancement while ascertaining good perceptual quality.
Journal ArticleDOI
Smoothing vs. sharpening of color images: Together or separated
TL;DR: This work will review these methods of denoising and enhancement and provide a detailed study of the state-of-the-art methods that attack both problems in colour images, separately.
Journal ArticleDOI
Enhancement of low-contrast images by internal noise-induced Fourier coefficient rooting
TL;DR: The proposed noise-enhanced iterative processing on Fourier coefficients for enhancement of low-contrast images has been found to give noteworthy performance for both low- Contrast and dark images among the SR-based techniques and is found to be better than most of the non-SR- based techniques, in terms of contrast enhancement, perceptual quality and colorfulness.
Proceedings ArticleDOI
Image denoising using dynamic stochastic resonance in wavelet domain
TL;DR: When compared with the conventional techniques for gaussian denoising, such as gaussian low pass filtering, and soft thresholding of wavelet coefficients, the DSR-based technique is found to give marginally better noise reduction in most of the cases.
References
More filters
Journal ArticleDOI
A multiscale retinex for bridging the gap between color images and the human observation of scenes
TL;DR: This paper extends a previously designed single-scale center/surround retinex to a multiscale version that achieves simultaneous dynamic range compression/color consistency/lightness rendition and defines a method of color restoration that corrects for this deficiency at the cost of a modest dilution in color consistency.
Journal ArticleDOI
Properties and performance of a center/surround retinex
TL;DR: A practical implementation of the retinex is defined without particular concern for its validity as a model for human lightness and color perception, and the trade-off between rendition and dynamic range compression that is governed by the surround space constant is described.
Journal ArticleDOI
Online palmprint identification
TL;DR: The system consists of a novel device for online palmprint image acquisition and an efficient algorithm for fast palmprint recognition, and a robust image coordinate system is defined to facilitate image alignment for feature extraction.
Journal ArticleDOI
Edge-preserving decompositions for multi-scale tone and detail manipulation
TL;DR: This paper advocates the use of an alternative edge-preserving smoothing operator, based on the weighted least squares optimization framework, which is particularly well suited for progressive coarsening of images and for multi-scale detail extraction.
Related Papers (5)
Magnetic resonance image enhancement using stochastic resonance in Fourier domain
Noise-induced contrast enhancement using stochastic resonance on singular values
Rajib Kumar Jha,Rajlaxmi Chouhan +1 more