The term“tetrachromacy” describes the physiological possession of four different classes of simultaneously functioning retinal photopigments (also called “weak tetrachromacy”). From an empirical standpoint, tetrachromatic color vision (or “strong tetrachromacy”) additionally requires demonstrating that mixtures of four independent appropriately chosen primary lights will simulate all distinctio...

When surfaces are overlaid by a transparent filter, color scission refers to the perceptual separation of the colors of the image into the colors of the underlying surface and the color of the overlaying layer. We used filter matching to measure the accuracy of color scission for simulated physical filters and materials. Standard filters were placed on various sets of chromatic materials and ma...

Flash photography is commonly used in low-light conditions to prevent noise and blurring artifacts. However, flash photography commonly leads to a mismatch between scene illumination and flash illumination, due to the bluish light that flashes emit. Not only does this change the atmosphere of the original scene illumination, it also makes it difficult to perform white balancing because of the i...

We have designed and implemented a system that analyzes images of air sensors taken on cell phones and extracts indoor air pollution information by comparing the sensor to a calibrated color chart. This system will be deployed with Project Surya, a pilot project of the UN Environmental Program that aims to replace traditional cooking methods with clean cooking technology in several rural Indian...

People can consistently match to odors to colors, and within a culture, there are similarities in color-odor associations. These associations are forms of crossmodal correspondences. Recently, there has been discussion about the extent to which these correspondences arise for structural reasons (e.g., an inherent mapping between color and odor), statistical reasons (e.g., covariance in experien...

Color is undeniably important to object representations, but so too is the ability of context to alter the color of an object. This study examined whether canonical knowledge about typical color or contextual knowledge about scenario-specific color plays a central role in object representation. Participants performed a modified Stroop task that asked them to name the color of a target word (typ...

The Robetta server (http://robetta.bakerlab.org) provides automated tools for protein structure prediction and analysis. For structure prediction, sequences submitted to the server are parsed into putative domains and structural models are generated using either comparative modeling or de novo structure prediction methods. If a confident match to a protein of known structure is found using BLAS...

In this article, a prediction error preprocessor based on the just noticeable distortion (JND) for the color image compression scheme is presented. The dynamic range of prediction error signals we can reduce, the lower bit rate of the reconstructed image we can obtain at high visual quality. We propose a color JND estimator that is incorporated into the design of the preprocessor in the compres...

--The paper presents the lossless image compression based on prediction and contourlet transform methods in image processing. The lossless compression usually a less bandwidth or less memory and low compression ratio at the cost of image quality degradation. In the paper presents prediction and Contourlet transform methods are used. In prediction method, convert the color image to YVU and then ...

Background: Hyperspectral image analysis is a fast and non-destructive technique that is being used to measure quality attributes of food products. This research investigated the feasibility of predicting internal quality attributes, such as Total Soluble Solids (TSS), pH, Titratable Acidity (TA), and maturity index (TSS/TA); and external quality attributes such as color components (L*, a*, b*)...