The geometrical attacks are still a problem for many digital watermarking algorithms at present. In this paper, we propose a watermarking algorithm for color images resistant to geometrical distortions (rotation and scaling). The singular value decomposition is used for watermark embedding and extraction. The log-polar mapping (LPM) and phase correlation method are used to register the position...

Restorations of 98 implant-supported single crowns in anterior maxillary area were divided into 5 groups: zirconia abutment, titanium abutment, and gold/gold hue abutment with zirconia coping, respectively, and titanium abutment with metal coping as well as gold/gold hue abutment with metal coping. A reflectance spectrophotometer was used to evaluate the color difference between the implant cro...

Visual servoing, or the control of motion on the basis of image analysis in a closed loop, is more and more recognized as 9 an important tool in modern robotics. Here, we present a new model-driven approach to derive a description of the motion 10 of a target object. This method can be subdivided into an illumination invariant target detection stage and a servoing process 11 which uses an adapt...

In classic Stroop interference, manual or oral identification of sensory colors presented as incongruent color words is delayed relative to simple color naming. In the experiment reported here, this effect was shown to all but disappear when the response was simply to point to a matching patch of color. Conversely, strong reverse Stroop interference occurred with the pointing task. That is, whe...

Research from the medical, psychological and sociological literature has found significant effects of eyes and eye color: that infants focus in on others’ eyes and that eyes affect social tasks, arousal and perceived attractiveness and honesty. These findings suggest that advertising spokespersons’ eyes may play an important role in ad viewer responses to the ad. This study examined that idea t...

In this paper we investigate the impact of colorimetric observer categories on the prediction of the average suprathreshold color difference perception. The observer categories were obtained from an observer classification experiment, while the color difference data were obtained from an experiment involving a liquid crystal display (LCD) with fluorescent backlight. The same observer panel with...

Sir, India has started Intensive Pulse Polio Immunization (IPPI) since 1995. An important improvement made in IPPI during 1998 was use of Vaccine Vial Monitors (VVM). The VVM is a small square, made of heat sensitive material, placed on an outer colored circle printed on the label of the OPV vial. There are four stages to read the VVM. In stages 1 and 2, the color of the square remains light gr...

Computer interfaces for color selection consist of a visible screen representation, an input method, and the underlying conceptual organization of the color model. We report a two-way factorial, between-subject variable experiment which tested the effect of high and low visual feedback interfaces on speed and accuracy of color matching for RGB and HSV color models. The only significant effect w...