C# Class Emgu.CV.Retina

A wrapper class which allows the Gipsa/Listic Labs model to be used. This retina model allows spatio-temporal image processing (applied on still images, video sequences). As a summary, these are the retina model properties: 1. It applies a spectral whithening (mid-frequency details enhancement); 2. high frequency spatio-temporal noise reduction; 3. low frequency luminance to be reduced (luminance range compression); 4. local logarithmic luminance compression allows details to be enhanced in low light conditions. USE : this model can be used basically for spatio-temporal video effects but also for : _using the getParvo method output matrix : texture analysiswith enhanced signal to noise ratio and enhanced details robust against input images luminance ranges _using the getMagno method output matrix : motion analysis also with the previously cited properties For more information, reer to the following papers : Benoit A., Caplier A., Durette B., Herault, J., "USING HUMAN VISUAL SYSTEM MODELING FOR BIO-INSPIRED LOW LEVEL IMAGE PROCESSING", Elsevier, Computer Vision and Image Understanding 114 (2010), pp. 758-773, DOI: http://dx.doi.org/10.1016/j.cviu.2010.01.011 Vision: Images, Signals and Neural Networks: Models of Neural Processing in Visual Perception (Progress in Neural Processing),By: Jeanny Herault, ISBN: 9814273686. WAPI (Tower ID): 113266891. The retina filter includes the research contributions of phd/research collegues from which code has been redrawn by the author : _take a look at the retinacolor.hpp module to discover Brice Chaix de Lavarene color mosaicing/demosaicing and the reference paper: B. Chaix de Lavarene, D. Alleysson, B. Durette, J. Herault (2007). "Efficient demosaicing through recursive filtering", IEEE International Conference on Image Processing ICIP 2007 _take a look at imagelogpolprojection.hpp to discover retina spatial log sampling which originates from Barthelemy Durette phd with Jeanny Herault. A Retina / V1 cortex projection is also proposed and originates from Jeanny's discussions. more informations in the above cited Jeanny Heraults's book.
Inheritance: Emgu.Util.UnmanagedObject
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Public Methods

Method Description
ClearBuffers ( ) : void

Clear all retina buffers (equivalent to opening the eyes after a long period of eye close.
GetMagno ( ) : byte>.Image

Accessor of the motion channel of the retina (models peripheral vision)
GetParvo ( ) : Byte>.Image

Accessor of the details channel of the retina (models foveal vision)
Retina ( Size inputSize ) : System

Create a retina model
Retina ( Size inputSize, bool colorMode, ColorSamplingMethod colorSamplingMethod, bool useRetinaLogSampling, double reductionFactor, double samplingStrength ) : System

Create a retina model
Run ( byte>.Image image ) : void

Method which allows retina to be applied on an input image, after run, encapsulated retina module is ready to deliver its outputs using dedicated acccessors. GetParvo() and GetMagno()

Protected Methods

Method Description
DisposeObject ( ) : void

Release all unmanaged memory associated with the retina model.

Method Details

ClearBuffers() public method

Clear all retina buffers (equivalent to opening the eyes after a long period of eye close.
public ClearBuffers ( ) : void
return void

DisposeObject() protected method

Release all unmanaged memory associated with the retina model.
protected DisposeObject ( ) : void
return void

GetMagno() public method

Accessor of the motion channel of the retina (models peripheral vision)
public GetMagno ( ) : byte>.Image
return byte>.Image

GetParvo() public method

Accessor of the details channel of the retina (models foveal vision)
public GetParvo ( ) : Byte>.Image
return Byte>.Image

Retina() public method

Create a retina model
public Retina ( Size inputSize ) : System
inputSize Size The input frame size
return System

Retina() public method

Create a retina model
public Retina ( Size inputSize, bool colorMode, ColorSamplingMethod colorSamplingMethod, bool useRetinaLogSampling, double reductionFactor, double samplingStrength ) : System
inputSize Size The input frame size
colorMode bool Specifies if (true) color is processed of not (false) to then processing gray level image
colorSamplingMethod ColorSamplingMethod Specifies which kind of color sampling will be used
useRetinaLogSampling bool Activate retina log sampling, if true, the 2 following parameters can be used
reductionFactor double Only usefull if param useRetinaLogSampling=true, specifies the reduction factor of the output frame (as the center (fovea) is high resolution and corners can be underscaled, then a reduction of the output is allowed without precision leak
samplingStrength double Only usefull if param useRetinaLogSampling=true, specifies the strenght of the log scale that is applied
return System

Run() public method

Method which allows retina to be applied on an input image, after run, encapsulated retina module is ready to deliver its outputs using dedicated acccessors. GetParvo() and GetMagno()
public Run ( byte>.Image image ) : void
image byte>.Image The input image to be processed
return void