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PsychGLImageProcessing

Psychtoolbox

Psychtoolbox:PsychGLImageProcessing -- OpenGL image processing functions.

This subfolder contains subroutines, tests and demos on how to use
the PTB built-in image processing pipeline.

The built in pipeline provides the infrastructure to define image processing
or stimulus image postprocessing operations on stimuli drawn by PTB's Screen
2D drawing commands or MOGL 3D OpenGL drawing commands.

The pipeline provides the data flow and API to define type and parameterization
of the image processing operations. Operations are usually implemented via
OpenGL GLSL shader plugins, vertex & fragment shader programs written in the
high level OpenGL Shading langugage GLSL and executed directly inside the
graphics processing unit GPU. While this is the most efficient way, operations
may also be defined in standard OpenGL code, Matlab M-Functions or C callable
functions.

Typical applications, realized via plugins are:


* Stereo display algorithms.
* High dynamic range display output drivers.
* Standard operations like 2D convolution, noise, linear superposition.
* Geometric undistortion of displays.
* Per pixel output corrections like gamma, color, gain, display PDF.

This part of PTB is under heavy construction. This intro will get extended
soon with more useful infos...


Files:


Add2DConvolutionToGLOperator - Create and add a shader for 2D image convolution to a GLOperator.
Add2DSeparableConvolutionToGLOperator - Create and add a shader for 2D separable image convolution to a GLOperator.
AddImageUndistortionToGLOperator - Add geometric image correction to a GLOperator.
AddToGLOperator - Add a shader with options to a GLOperator.
BitsPlusPlus - Setup function for imaging pipelines built-in Bits++ support.
CountSlotsInGLOperator - Count number of processing slots in a given GLOperator.
CreateDisplayWarp - Internal helper function for setup of geometric display undistortion.
CreateGLOperator - Create a new GLOperator as container for imaging operations.
CreateProceduralGabor - Create a procedural texture for fast drawing of Gabor patches.
CreateProceduralNoise - Create a procedural texture for fast drawing of random noise patches.
CreateProceduralSineGrating - Create a procedural texture for fast drawing of sine grating patches.
CreatePseudoGrayLUT - Create a lookup table for pseudogray conversion - Internal helper function.
CreateResolutionPyramid - Build a mip-map image resolution pyramid for given texture.
CreateSinglePassImageProcessingShader - Create a single pass image processing shader for simple but common operations.
DisplayUndistortionBezier - Interactive geometric display calibration for simple needs.
DisplayUndistortionBVL - Interactive geometric display calibration. Recommended!
DisplayUndistortionCSV - Import ASCII data file with geometric display calibration for NVidia "Warp API".
DisplayUndistortionHalfCylinder - Interactive geometric display calibration for half-cylinder or spherical projections.
DisplayUndistortionLabRiggerMouseStim - Create display undistortion based on method from LabRigger for mouse visual stims.
DisplayUndistortionSphere - Interactive geometric display calibration for spherical projections.
ImagingStereoDemo - Counterpart to StereoDemo, but using imaging pipeline
for increased fidelity, flexibility, ease of use.
MakeTextureDrawShader - Create GLSL shader for use with Screen('DrawTexture') and Screen('MakeTexture')
to apply on-the-fly texture filtering operations during texture draw.

PsychImaging - Generic setup routine for the imaging pipeline. Allows to setup
and initialize the pipeline for many common tasks.
PsychVideoSwitcher - Setup routine for the Xiangru Li et al. "VideoSwitcher" video attenuator device.

SetAnaglyphStereoParameters - Function for runtime tuning of Anaglyph stereo parameters,
see ImagingStereoDemo for example of use.
SetStereoBlueLineSyncParameters - Change settings for drawing of stereo sync lines in frame-sequential stereo mode.
SetStereoSideBySideParameters - Change parameters for side-by-side stereo display modes (4 and 5).
SetCompressedStereoSideBySideParameters - Change parameters for compressed side-by-side stereo display modes.

VignetCalibration - Vignetted luminance calibration procedure for undistortion of distorted display luminance.

Constants for imagingmode flag of Screen('OpenWindow', ...., imagingmode);
One can 'or' them together, e.g., imagingmode = mor(kPsychNeed16BPCFixed, kPsychNeedFastBackingStore);

kPsychNeed16BPCFixed - Request 16 bit per color component, fixed point framebuffer.
kPsychNeed16BPCFloat - Request 16 bit per color component, floating point framebuffer.
kPsychNeed32BPCFloat - Request 32 bit per color component, floating point framebuffer.
kPsychNeedDualPass - Indicate that some of the used image processing plugins will need
at two render passes for processing.
kPsychNeedFastBackingStore - Enable minimal imaging pipeline. This flag is implied when using any
of the other flags.
kPsychNeedFastOffscreenWindows - Only enable support for fast Offscreen windows, nothing else.
kPsychNeedHalfWidthWindow - Tell imaging pipe to create internal buffers half the real window width. Internal flag, not useful for end-user code.
kPsychNeedHalfHeightWindow - Tell imaging pipe to create internal buffers half the real window height. Internal flag, not useful for end-user code.
kPsychNeedImageProcessing - Request explicit support for image processing.
kPsychNeedMultiPass - Indicate that some of the used plugins will need more than two passes.
kPsychNeedOutputConversion - Indicate that display output is going to some special output device that
needs special output formatting, e.g., Bits++ or Brightside HDR.




Path   Retrieve current version from GitHub | View changelog
Psychtoolbox/Contents.m


The following 81 page(s) belong to PsychGLImageProcessing

Add2DConvolutionToGLOperator
Add2DSeparableConvolutionToGLOperator
AddImageUndistortionToGLOperator
AddImageWarpToGLOperator
AddToGLOperator
BFRenderSceneUnwrap
BitsPlusPlus
CountSlotsInGLOperator
CreateDisplayWarp
CreateGLOperator
CreateProceduralGabor
CreateProceduralGaussBlob
CreateProceduralNoise
CreateProceduralSineGrating
CreatePseudoGrayLUT
CreateResolutionPyramid
CreateSinglePassImageProcessingShader
DisplayUndistortionBVL
DisplayUndistortionBezier
DisplayUndistortionCSV
DisplayUndistortionHalfCylinder
DisplayUndistortionLabRiggerMouseStim
DisplayUndistortionSphere
DrawRectFrame
EXPImagingStereoDemo
HookFunction
HookProcessingChains
MakeTextureDrawShader
NewCalibFile
OpenProxy
PsychColorCorrection
PsychHelperCreateARGB2101010RemapCLUT
PsychHelperCreateGenericLuminanceToRGBA8LUT
PsychHelperCreateRGB111110RemapCLUT
PsychHelperCreateRemapCLUT
PsychImaging
PsychVideoSwitcher
Psychtoolbox
SetAnaglyphStereoParameters
SetCompressedStereoSideBySideParameters
SetStereoBlueLineSyncParameters
SetStereoSideBySideParameters
TransformTexture
UnitTests
VignetCalibration
bvlAcceptCalibGuiInput
bvlBarrelPincushionDots
bvlDrawCrosshair
bvlDrawText
bvlExpandContractDots
bvlSelectFitPts
bvlShearDots
bvlTranslateDots
bvlTrapezoidDots
bvlWaitForInput
createnewcalibrationgrid
fineadjust
fit
gpustereocalibrationdemo
kPsychAssumeTextureNormalized
kPsychNeed16BPCFixed
kPsychNeed16BPCFloat
kPsychNeed32BPCFloat
kPsychNeedClientRectNoFitter
kPsychNeedDualPass
kPsychNeedDualWindowOutput
kPsychNeedFastBackingStore
kPsychNeedFastOffscreenWindows
kPsychNeedHalfHeightWindow
kPsychNeedHalfWidthWindow
kPsychNeedImageProcessing
kPsychNeedMultiPass
kPsychNeedOtherStreamInput
kPsychNeedOutputConversion
kPsychNeedRetinaResolution
kPsychNeedTwiceWidthWindow
kPsychUse32BPCFloatAsap
manualcalibrate
moglExtractTexture
poly2fit
selectcalibrationpoints
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