This paper describes a comparison of user experience of virtual reality (VR) image angles. 7 angles conditions are prepared and evaluated the user experience during viewing VR images with a headset by measuring subjective and objective indexes. Angle conditions were every 30 degrees from 180 to 360 degrees. From the results of the subjective indexes (reality, presence, and depth sensation), a 360-degree image was evaluated highest, and different evaluations were made between 240 and 270 degrees.In addition, from the results of the objective indexes (eye and head tracking), a tendency to spread the eye and head movement was found as the image angle increases.
Color volumes in the new color spaces ICtCp and Jzazbz are used to characterize the performances of different types of displays. The viewing angle behavior of the emissive properties of one QLED TV and one OLED TVs are measured and compared. The influence of the top polarizer on the reflective properties of one LCD vehicle display is also measured and the color performances under various parasitic illumination are predicted.
Physico-realistic simulation of any type of display needs to take into account not only its emissive properties but also its reflective properties which can play a key role in outdoor situations for example. We discuss a method based on Fourier optics viewing angle instruments capable to measure the emissive properties of a display for quasi-all its viewing angle and also its reflective properties versus angle and wavelength very rapidly. More precisely the spectral BRDF of the display surface is measured at different incident angles with a good angular resolution to be able to simulate accurately the unwanted reflections that corrupt display contrast and color. Thanks to the angular dependence, the display aspect for an observer anywhere in front of it can be obtained rapidly for any color image and the impact of the different imperfections can be visualized and quantified. Same experimental data are use in a new generation of spectral ray tracing software. The ray-tracing accuracy is checked by simulations of color images and comparison to analytical calculation of the light emitted and reflected by each pixel of the display.