Contrast in visible images is one of the most relevant characteristics of visual signals. Since
the pioneering works performed in vision psychology and optics, different definitions have …

Measuring camera system performance and associating it directly to image quality is very
relevant, whether images are aimed for viewing, or as input to machine learning and …

In this study, we aimed to validate a novel light field virtual reality (LFVR) system for
estimating refractive errors in the human eye. Fifty participants with an average age of …

Objective To determine the relationship between neurovascular coupling (NVC), vision and
sensory performance in Special Operations Forces (SOF) combat soldiers with and without …

Contrast discrimination determines the threshold contrast required to distinguish between
two suprathreshold visual stimuli. It is typically measured using sine-wave gratings. We first …

Spatial image quality metrics designed for camera systems generally employ the Modulation
Transfer Function (MTF), the Noise Power Spectrum (NPS), and a visual contrast detection …

In this paper, a theoretical model is presented for the display process of uniformly-arranged
virtual-pixel LED displays with RGBG sub-pixel structure cells. Such displays' modulation …

Image quality evaluation is an important research topic in the field of image processing.
Contrast is a common image quality assessment index which can reflect the level of …

We investigated spatio-chromatic contrast sensitivity in both younger and older color-normal
observers. We tested how the adapting light level affected the contrast sensitivity and …

There are many unresolved challenges when it comes to the assessment of image and
video quality. To begin with, engineering-type quality models that account for imaging …