Edible films and coatings have currently received increasing interest because of their potential in food applications. This study examined the effect incorporated essential oils natural plant extracts on characteristics composite seaweed hydrocolloid gac pulp films. Films were prepared by a casting technique, followed measurement physical, optical, barrier, mechanical, structural properties. Th...

We propose a numerical method to determine a transformation of a color space into a hue linear color space with a maximum degree of perceptual uniformity. In a first step, a transformation of the initial color space into a nearly perceptually uniform space is computed using multigrid optimization. In a second step, a hue correction is applied to the resulting color space while preserving the pe...

A novel extension to a previous method has been proposed to evaluate the nature of dry powder mixing processes using a mixing sensitive colouring agent. The method proposed measures the change in the colour (hue) and colour intensity of the powder blends over mixing time. To evaluate the extent of fine particle dispersion and de-agglomeration, cohesive and free flowing lactose (white) and cohes...

Using an asymmetric color matching technique, we measured the perceived changes that occur in the saturation and hue of colored stimuli at different eccentricities within the central 25 degrees of the human retina in nine color-normal subjects. A cone-opponent-based vector model was used to compute the activity of the L-M and S-(L+M) channels. The results show that a large proportion of the shi...

Hue matching was used to obtain measures of Bezold-Brucke hue shifts with very brief flashes (17 msec) at ten wavelengths and several illuminance levels. Results were generally similar to those obtained by Purdy (1931) with uncontrolled stimulus duration. but there were also important differences. These were: the locations of invariant hues; the direction of shift for blue-green hues: and a rev...