G. Sreelekha

Learn More
A perceptual image coder for the compression of monochrome images is presented here, in which the coding structure is coupled with a vision model to produce coded images with an improved visual quality at low bit-rates. The coder is an improvement on the Joint Photographic Experts Group (JPEG -Discrete Cosine Transform (DCT) based) image compression(More)
High Efficiency Video Coding (HEVC) is the most recent video compression standard that achieves higher encoding efficiency over earlier popular standards like MPEG-2 and H.264/AVC. By adopting a variety of coding efficiency enhancement and parallel processing tools, HEVC is in a position to provide up to 50% more bit-rate reduction over its precursor(More)
In this paper, a new denoising technique for images corrupted with additive white Gaussian noise is presented. The technique used here is to combine the wavelet transform and the curvelet transform with anisotropic diffusion. Curvelet transform is a new geometric-based multiscale transform developed to give sparse representation of images with singularities(More)
Latest advancements in capture and display technologies demand better compression techniques for the storage and transmission of still images and video. High efficiency video coding (HEVC) is the latest video compression standard developed by the joint collaborative team on video coding (JCTVC) with this objective. Although the main design goal of HEVC is(More)
A perceptual image coder for the compression of monochrome images is presented here, in which the coding structure is coupled with a vision model to produce coded images with an improved visual quality at low bit-rates. The coder is an improvement on the current image compression standard, JPEG2000. The proposed coding structure incorporates the human(More)
A data driven background subtraction algorithm where each background pixel is modeled with a representative set of samples is presented. The samples are pixel values observed in preceding frames. Each pixel in an incoming frame is classified as background or foreground by comparing the pixel value with the samples in pixel's background model. The background(More)
High Efficiency Video Coding (HEVC) is a new standard under development by the ISO and ITU-T. In this work an encoder which incorporates HVS models into the basic coding structure of the recommended HEVC standard is implemented, to improve the quality of the standard coder. Since human eye ultimately decides the quality of the received signal and the sole(More)