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Element Icon Gabor Grating Element
Category: Visual Stimuli AddIn: Visual Kernels
Creator: OkazoLab Team Scope: Parent Event
Owns Snippets: no Usage: Runtime Screen,Snippets

Synchronized Internal Actions

Experiment StartParent Event OnsetStatus change between Onset/OffsetParent Event OffsetExperiment End
Is displayed on screen Is removed from screen


Generic Properties

NameDescriptionConstraintsValue TypeUpon Change
FrequencyDefines the number of the grating cycles per element width. Zero value switches the element in the gaussian blob mode- the full color range is used by the gaussian function alone. Double
SigmaDefines the standard deviation of the gaussian component. Double
PhaseShift in degrees for grating phase (0..360) Double
ThetaGrating orientation (0..360) Double
Ellipticity RatioDefines the gaussian ellipticity- a ratio between width and height (0..1) Double
Trim ThresholdDefines the threshold for the gaussian component (0..1) such that the values below are trimmed off. Double
GammaDefines the custom gamma correction for the generated RGB pixeles Double
Low colorDefines the lowest RGB color for the generated pixels. stColor
High colorDefines the highest RGB color for the generated pixels. stColor
Patch ShapeDefines the highest RGB color for the generated pixels. GaborPatchShape

+=== Properties inherited from clElement === Inherited properties of clElement
NameDescriptionConstraintsValue TypeUpon Change
Is EnabledIf set to false the element is completely omitted when the experiment is run.Boolean
TitleTitle of the element.String

+=== Properties inherited from clVisualElement ===
NameDescriptionConstraintsValue TypeUpon Runtime Change
Alpha MaskingDefines whether the visual content rendered by this element will be used as an opacity mask which is applied onto the given event surface. The active opacity mask allows one to expose pixels of the parent event surface through a solid background of the given event. If the value is true, the darker pixels of the content will make more transparent holes on the entire event surface.Boolean
AntiAliasingIf true, the rendered content will be anti-aliased for smoother visual appearance. If false, rendering will be authentic to its source, e.g. a bitmap. Boolean
PositionDefines the position of the element viewport on the screen. The position can be set in any of three coordinate systems: a) pixels, b) polar, c) central. clPoint
SizeDefines the size of the element viewport on the screen. The size can be set in any of three coordinate systems: a) pixels, b) visual degrees, c) 'relative-to-screen' size. clSize
Z OrderIndicates the current depth order of the element viewport on the surface of the parent event. The greatest number corresponds to the top position. The order can be changed by moving the element up and down in the element list.Int32
Pivot PointDefines the pivot point (coordinate and the rotation centers) within the element viewport. stAlignment or Int32
VisibleDefines whether the element is currently visible on the event surface. The property is convenient for switching visual content on and off. Boolean
RotationDefines the rotation angle (in degrees) of element viewport relative to the its pivot point. Double in the range 0..360
Transparent ColorThe color of the original pixels of rendered content that will be set as transparent. stColor
Transparency ToleranceTolerance ratio for choosing colors that become transparent. Zero means that effect is not applied, 1 denotes that all colors will become trasparent. Int32, range (0..100)
Color MaskProduces a multiplicative combination of the original pixels and the selected mask color (except the alpha channel). The effect emulates a look through a colored glass. White or transparent mask color doesn't change the original pixels. stColor
OpacityOpacity of the rendered content. Int32, range (0..100)
ContrastContrast of the rendered content. Int32, range (-100..100)
BrightnessDefines the brighness of the rendered content. Int32, range (-100..100)
SaturationSaturation of the rendered content. Double
PixelationDefines the pixel scale of the rendering. Int32, range (0..100)
BlurringThe radius used in the gaussian blur of rendered content, as a pixel-based factor. The default is 0 which means no blurring. Int32
Reset JitterSet to true at runtime to reset the current positional jitter.Boolean, set true for action
Current JitterJitter range, in pixels (non inclusive)..clSize
Jitter RangeJitter range, centered at the original position of the element.. clSize

Element renders a single gabors grating within a rectangular area on the screen.


Gabor element is capable of generating gabor and linear grating patches defined by a set of parameters.The algorithm is adapted from a work of Elliot Freeman. http://www.icn.ucl.ac.uk/courses/MATLAB-Tutorials/Elliot_Freeman/html/gabor_tutorial.html#9




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