A Glass pattern consists of randomly distributed dot pairs (dipoles) whose orientations are determined by a geometric transform. To understand how an observer perceives the global structure, we investigated how the threshold for detecting a concentric or a radial Glass pattern (target) can be affected by the presence of another Glass pattern (masker). The Glass patterns had either concentric, r...

Supra-threshold spatial integration was studied by testing the saliency of multi Gabor element conngurations in short duration binocular rivalry (dichoptic masking) conditions. Dichoptic presentations allows for a competition between spatially overlapping supra-threshold stimuli that involve non-overlapping receptive elds in the rst stage of visual ltering. Diierent spatial conngurations of Gab...

Models of vernier acuity based on the differential response of oriented filters receive support from the finding that vernier threshold elevation peaks for grating mask orientations which are slightly different from the orientation of the vernier bars. We replicate this effect using long, abutting vernier bars, and masks which possess gaps up to 22.5’ wide (Experiments 1 and 3); a surprising re...

It is known that visual noise added to sinusoidal gratings changes the typical U-shaped threshold curve which becomes flat in log-log scale for frequencies below 10c/deg when gratings are masked with white noise of high power spectral density level. These results have been explained using the critical-band-masking (CBM) model by supposing a visual filter-bank of constant relative bandwidth. How...

We present an automatic method for checking the geometric accuracy of ALS points. First for each strip a DEM is interpolated using the moving planes method. The accuracy of the interpolated height at each grid point and the distance between each grid point and the centre of gravity of the original ALS points used for interpolation are used to derive a smoothness mask for each strip. Afterwards ...

Supra-threshold spatial integration was studied by testing the saliency of multi-Gabor element configurations in short duration binocular rivalry (dichoptic masking) conditions. Dichoptic presentations allow for a competition between spatially overlapping supra-threshold stimuli that involve non-overlapping monocular receptive fields in the first stage of visual filtering. Different spatial con...

The overlapping of black dot decreases brightness and black dot is very sensitive to the human visual system in the bright region. In this paper, for gray-level expression, only the bright gray region in the color image was considered for blue noise mask (BNM) approach. To solve this problem, BNM with CMY dot was used for the bright region instead of black dot. We dispersed CMY dots spatially. ...

Mechanisms supporting orientation selectivity of cat striate cortical cells were studied by stimulation with two superimposed sine-wave gratings of different orientations. One grating (base) generated a discharge of known amplitude which could be modified by the second grating (mask). Masks presented at nonoptimal orientations usually reduced the base-generated response, but the degree of reduc...

Introduction dMRI tractography needs to be constrained by a white matter (WM) mask defining the 3D space within which fibers are tracked. Most techniques usually threshold the fractional anisotropy (FA) maps (typical threshold between 0.1-0.2) assuming that when FA is too small, the uncertainty of the principal diffusion direction is high. However, this criterion is rough as the FA value is not...

With continuous developments in deep learning, image semantic segmentation technology has also undergone great advancements and been widely used many fields with higher accuracy. This paper proposes an algorithm based on a neural network. Based the Mask Scoring R-CNN, this uses symmetrical feature pyramid network adds multiple-threshold architecture to improve sample screening precision. We emp...