Lighting conditions estimation is a crucial point in many applications. In this paper, we show that combining color images with corresponding depth maps (provided by modern depth sensors) allows to improve estimation of positions and colors of multiple lights in a scene. Since usually such devices provide low-quality images, for many steps of our framework we propose alternatives to classical a...

In this paper, a new color image segmentation method based on modified Fuzzy c-means and data fusion techniques is presented. The proposed segmentation consists in combining many realizations of the same image, to gether, in order to increase the information quality and to get an optimal segmented image. In the first step, the membership degree of each pixel is determined by applying fuzzy c-me...

Balinese papyrus is one of the media to write the ideas from minstrels in ancient times. Currently, many ancient literatures which are written in the papyrus, that also very difficult to identify because the writings were beginning to rot or fade influenced by age. In this study takes the Balinese papyrus characters as its object. The improvement of the image quality in image processing of the ...

A digital color image quality metric is proposed in this work based on the characteristics of the human visual system (HVS). Chromatic coordinates are transformed from spectral cone absorption responses to the opponent-color space. The sensitivity thresholds in each of the color space axes are measured and visual masking models are provided and parameterized. Multiple contrasts are computed by ...

Just as the invention of photography challenged the world's visual literacy at the turn of the century, so has computer graphics begun to reshape visual communication. Although still in its infancy, recently developed tools for visual communication have made computer graphics and electronic imaging accessible to a much larger number of artists and other professionals. The use of these systems h...

This paper develops a steganography-based paradigm for lossless-quality compression of high-resolution color images acquired by megapixel cameras. Our scheme combines space-domain and frequency-domain image processing operations where in the space domain, color-brightness separation is exploited, and in the frequency domain, spectral properties of the Fourier magnitude and phase of the color im...

Humans have always seen the world in color. In the last three decades, there has been rapid and enormous transition from grayscale images to color ones. Well-known objective evaluation algorithms for measuring image quality include mean squared error (MSE), peak signal-to-noise ratio (PSNR), and human Visual System based one are structural similarity measures and edge based similarity measures....

in this research, attention is focused on the resistantance of packages containing silver nanoparticles to gases such as oxygen as well as to the antimicrobial property of these packages. the effect of these packages on increasing quality and shelf time of the barberry was investigated in comparison with the current polyethylene packages. to do this, different microbial factors and the color of...

Hartley, Cosine, Slant and Haar Transforms for Grayscale Image Colorization Using Thepade‟s Transform Error Vector Rotation(TTEVR) Algorithms of Vector Quantization in YIQ, RGB and YCbCr color spaces are compared here for color pallet(codebook) size 32, 64, 128, 256 and 512. Here a color pallet is produced from reference(color) image from which color traits need to be taken using vector quantiz...