The interaction between brightness and color causes there to be different color appearance when one and the same object is viewed against surroundings of different brightness. Brightness contrast causes color to be desaturated, as has been found in perceptual experiments on color induction and color-gamut expansion in human vision. However, it is not clear yet where in the cerebral cortex the b...

PURPOSE Interocular brightness differences such as those caused by asymmetrical cataract have been found to have a minimal effect on interocular brightness matches. In the present study, the measured binocular visual response to interocular differences in retinal illuminance was measured over time. METHODS Interocular differences in retinal illuminance of magnitudes 0.3, 0.6, and 0.9 log unit...

In 1924 CIE defined the V(λ) function to describe the “relative visibility”. It was soon realised that this was not a right description for brightness. During the seven decades that passed by, several attempts were made to describe brightness for monochromatic, less saturated and near white lights. Among the near-white light descriptions the approach by Haubner [1] is the best-known. For monoch...

We report on a detailed investigation of continuous-wave and SESAM mode-locked (ML) laser operation an Yb:SrLaAlO 4 laser. Pumped with high-brightness fiber at 976 nm, the ML delivered soliton pulses as short 38 fs 1071 nm average output power 86 mW pulse repetition rate ?59 MHz. The maximum reached 1.05 W 1054 for longer (94 fs), corresponding to peak 146 kW optical efficiency 38.6%. To best o...

Brightness illusions demonstrate that an object's perceived brightness depends on its visual context, leading to theoretical explanations ranging from simple lateral inhibition to those based on the influence of knowledge of and experience with the world. We measure the relative brightness of mid-luminance test disks embedded in gray-scale images, and show that rankings of test disk brightness ...

Blakeslee and McCourt ((1997) Vision Research, 37, 2849-2869) demonstrated that a multiscale array of two-dimensional difference-of-Gaussian (DOG) filters provided a simple but powerful model for explaining a number of seemingly complex features of grating induction (GI), while simultaneously encompassing salient features of brightness induction in simultaneous brightness contrast (SBC), bright...

A new class of brightness illusions is introduced that cannot be entirely accounted for by bottom-up models of neuronal processing. In these new illusions, brightness can be modulated by the location of voluntary attention in the absence of eye movements. These effects may arise from top-down or mid-level mechanisms that determine how 3D surfaces and transparent layers are constructed, which in...