Color correction involves mapping device RGBs to display counterparts or to corresponding XYZs. A popular methodology is to take an image of a color chart and then solve for the best 33 3 matrix that maps the RGBs to the corresponding known XYZs. However, this approach fails at times when the intensity of the light varies across the chart. This variation needs to be removed before estimating th...

This is the first part of a two week experiment in image processing. During this week, we will cover the fundamentals of digital monochrome images, intensity histograms, pointwise transformations, gamma correction, and image enhancement based on filtering. In the second week , we will cover some fundamental concepts of color images. This will include a brief description on how humans perceive c...

In this paper, we present an interactive system for users to easily colorize the natural images of complex scenes. In our system, colorization procedure is explicitly separated into two stages: Color labeling and Color mapping. Pixels that should roughly share similar colors are grouped into coherent regions in the color labeling stage, and the color mapping stage is then introduced to further ...

With quick development of Kinect, depth image has become an important channel for assisting the color/infrared image in diverse computer vision tasks. Kinect can provide depth image as well as color and infrared images, which are suitable for multi-model vision tasks. This paper presents a framework for intensity-depth face alignment based on cascade shape regression. Information from intensity...

In this paper, image retrieval method based on statistics and projection is presented. At first, images are transferred from the RGB color model to the HSI color model, then images are segmented into sub-images (or blocks) and extract the main hue and main intensity in these sub-images. Images’ main hue and main intensity are projected onto the horizontal and vertical directions, respectively, ...

This study aims to increase the retrieval efficiency of proposed image retrieval system on the basis of color content. A new idea of feature extraction based on color perception histogram is proposed. First, the color histogram is constructed for HSV image. Secondly, the true color and grey color components are identified based on hue and intensity. The weight for true and grey color components...

The correct color of water and bottom refraction is one of the most important parts of realistic visual water simulation. The paper is devoted to the real time rendering of scenes with shallow water when the bottom is visible. It covers the model of light transport at the water surface and through the water medium that allows us to calculate spectral intensity of light at the surface; the human...

www.poynton.com [email protected] This FAQ is intended to clarify aspects of color that are important to color image coding, computer graphics, image processing, video, and the transfer of digital images to print. I assume that you are familiar with intensity, luminance (CIE Y), lightness (CIE L*), and the nonlinear relationship between CRT voltage and intensity (gamma). To learn more about t...

A novel saliency detection method for maritime search and rescue using singular value decomposition to the amplitude spectrum is proposed. Color and intensity features of images are extracted and amplitude spectrums of them are obtained by Fourier transform. Singular value decomposition (SVD) is conducted on the amplitude spectrums and the saliency maps are defined as the inverse Fourier transf...