Web-enabled image processing operators

Below you find web implementations of various biologically motivated image processing operators, which you can use with your own image material.

• Combination Of Shifted FIlter Responses (COSFIRE) operator for image processing and computer vision. [download source]
  This program can be used to (see explanations and examples):
  • Configure a trainable filter for a given local contour prototype pattern
  • Detect patterns that are similar to the prototype pattern
  • Visualize the structure of a configured COSFIRE filter

• Combination Of Receptive Fields (CORF) operator for image processing and computer vision. [download source]
  This program can be used to (see explanations and examples):
  • Detect contours in given images of natural scenes

• Relevance and Matrix adaptation in Learning Vector Quantization (GRLVQ, GMLVQ and LiRaM LVQ) [download source]
  This toolbox can be used for classification, feature selection and supervised dimensionality reduction. It contains:
  • Generalized Relevance LVQ (GRLVQ) for classification and feature relevance detection
    (including training, classification and regularization)
  • Generalized Matrix LVQ (GMLVQ) for classification, distance learning and discriminative linear dimension reduction
    (including training, classification, regularization and the limited rank version for projection)
  • Localized Generalized Matrix LVQ (LGMLVQ) for classification and dissimilarity learning
    (including training, classification and regularization)
  • n-fold-cross validation for splitting data sets in experimental evaluation
  • z-score transformation preprocessing to obtain zero mean and unit variance features
  • a voronoi tesselation to visualize the receptive fields of labeled prototypes

• Gabor filter for image processing and computer vision. [download source]
  With this program you can (see explanations and examples):
  • visualize Gabor functions,
  • use a Gabor filter and a Gabor-energy filter,
  • perform edge detection,
  • simulate simple and complex cells (visual cortex),
  • extract texture features,
  • simulate non-classical receptive field inhibition or surround suppression (visual cortex),
  • perform contour detection,
  • explain certain visual perception effects.

• Canny edge detector (Canny filter) for image processing and computer vision. [download source]
  With this program you can (see explanations and examples):
  • apply the Canny edge detector on-line on your own images,
  • visualize a derivative of a Gaussian function,
  • simulate non-classical receptive field inhibition or surround suppression,
  • perform contour detection.

• Centre-Surround cell (DoG) operator and Dot-pattern selective cell operator. [download source]
  This program can be used to (see explanations and examples):
  • visualize Difference of Gaussian (DoG) functions,
  • simulate retinal-ganglion and LGN cells,
  • compute the convolution of an input image with a DoG (center-surround cell responses),
  • detect intensity spots,
  • detect groups of intensity spots,
  • detect dot-pattern texture.

• Grating cell operator for image processing and computer vision. [download source]
  This program can be used to (see explanations and examples):
  • Detect grating
  • Visualization of grating subunits
  • Visualization of grating cells