Operator Index

Converting between image file formats (gif, bmp, tiff, jpeg, png, pandore, etc).

• pany2pan - Converts known image format file to Pandore image file.
• pbmp2pan - Converts BMP image file to Pandore image file.
• ppan2bmp - Converts Pandore file to BMP image file.
• pgif2pan - Converts GIF image file to Pandore image file.
• ppan2gif - Converts Pandore image file to GIF image file.
• pjpeg2pan - Converts JPEG image file to Pandore image file.
• ppan2jpeg - Converts Pandore file to JPEG image file.
• ppng2pan - Converts PNG image file to Pandore image file.
• ppan2png - Converts Pandore file to PNG image file.
• ppan2ppm - Converts Pandore image file to PPM (ascii) image file.
• pppm2pan - Converts PPM, PGM, or PBM image file to Pandore file.
• ptiff2pan - Converts TIFF image file to Pandore image file.
• ppan2tiff - Converts Pandore image file to TIFF image file.
• pvff2pan - Converts VFF image file to Pandore image file.
• ppan2vff - Converts Pandore image file to VFF image file (Sunvision).
• ppan2pan - Converts any Pandore file format to current Pandore file format.
• pras2pan - Converts Sun raster image file to Pandore image file.
• praw2pan - Converts raw image file to Pandore image file.
• ppan2raw - Converts Pandore file to raw file.
• ppan2ps - Converts Pandore image file to Encapsulted PostScript file.
• ppan2txt - Converts Pandore image file to text file.
• ptxt2pan - Converts text file to Pandore image file.
• pyuv2pan - Converts a YUV image sequence file to a Pandore image file.
• pfits2pan - Converts FITS (Flexible Image Transport System) image file to Pandore image file.
• ppan2fits - Converts Pandore gray-scale image (1D, 2D or 3D) to FITS (Flexible Image Transport System) image file.
• pparrec2pan - Converts PAR/REC format image file (Philips Medical System) to Pandore image file.
• panalyze2pan - Converts Pandore image file to ANALYZE 7.5 image file.
• ppan2analyze - Converts ANALYZE 7.5 image file to Pandore image file.
• ppan2d23d - Converts a series of Pandore 2D image files to a unique 3D image file.
• ppan3d22d - Converts Pandore 3D image file to a series of 2D Pandore image files.

Type casting between Pandore object: float image to uchar image, image to region map, etc.

• parray2im - Converts pixel array to image.
• pim2array - Converts image to pixel array.
• prg2im - Converts region map to signed long image.
• prg2imc - Converts region map to equivalent color image.
• pim2rg - Converts grayscale image to region map.
• pgr2im - Converts graph to float image.
• prg2gr - Converts region map to graph.
• pgr2rg - Converts graph to region map.
• pim2sf - Converts any image type to float image.
• pim2uc - Converts any image type to unsigned char image.
• pim2sl - Converts any image type to signed long image.
• pim2d23d - Converts 2D image or region map to 3D image or region map with 1 slice.
• pim3d22d - Converts 3D image or region map with one slice to 2D image or region map.
• pimc2img - Converts color image to grayscale image.
• pimc2imx - Creates a multispectral image with a color image.
• pimg2imc - Converts a grayscale image into a color image.
• pimg2imx - Converts a grayscale image into a multispectral image.
• pimgs2imc - Creates a color image from 3 grayscale images.
• pimgs2imx - Creates a multispectral image from several grayscale images.
• pimx2img - Converts one band of multispectral image to grayscale image.
• pimx2imc - Converts multispectral image to color image.

Converting color spaces: rgb to hsl, rgb to yuv, etc.

• phsi2rgb - Converts HSI color image to RGB color image.
• phsl2rgb - Converts HSL color image to RGB color image.
• phsv2rgb - Converts HSV color image to RGB color image.
• plab2lch - Converts Lab color image to LCH color image.
• pluv2lch - Converts L*u*v color image to LCH color image.
• prgb2pca - Converts rgb color image to principal components.
• prgb2ast - Converts rgb color image to AST color image.
• prgb2cmyk - Converts RGB color image to Cyan-Magenta-Yellow-Key space image.
• pcmyk2rgb - Converts Cyan-Magenta-Yellow-Key color image to RGB color image.
• prgb2gray - Converts RGB color image to gray space image.
• prgb2hsi - Converts RGB color image to HSI color image.
• prgb2hsl - Converts RGB color image to HSL color image.
• prgb2hsv - Converts RGB color image to HSV color image.
• prgb2i1i2i3 - Converts RGB color image to (i1,i2,i3) color image.
• prgb2wry - Converts RGB color space to (wb,rg,yb) color space.
• prgb2xyz - Converts RGB color image to XYZ color image.
• prgb2rgnbn - Converts RGB color image to normalized RGB color image.
• prgb2ycbcr - Converts RGB color image to YCbCr color image.
• prgb2ych1ch2 - Converts RGB color space to YCh1Ch2 color image.
• prgb2yiq - Converts RGB color image to YIQ color image.
• prgb2yuv - Converts RGB color image to YUV color image.
• pyuv2rgb - Converts YUV color image to RGB color image.
• pxyz2lab - Converts XYZ color image to Lab color image.
• pxyz2luv - Converts XYZ color image to L*u*v color image.
• pxyz2rgb - Converts XYZ image to RGB image.
• pgray2bw - Converts gray scale image to black and white image.
• pgray2falsecolor - Converts gray level image to false color image.

Binary and unary operations on image, graph, or region map.

• padd - Performs addition between images or graphs.
• pdif - Performs difference between images or graphs and non symmetrical difference between region maps.
• psub - Performs subtraction between images or graphs and non symmetrical difference between region maps.
• pmult - Performs multiplication between images or graphs.
• pdiv - Performs division between images or graphs.
• pmean - Performs average between images or graphs.
• pblend - Performs alpha blending of image or graph.
• ppow - Computes nth power of an image or a graph.
• psqrt - Computes square root of image or graph.
• pexp - Computes exponential of image or graph.
• plog - Computes natural logarithm of image or graph.
• pmax - Performs maximum values between image or a graph.
• pmin - Computes minimum values between image or graph.
• pabs - Computes absolute value of image or graph.
• pround - Computes round integral value of image or graph.
• pclipvalues - Clips pixel values inside the specified range.
• pnormalization - Performs normalization of image or graph.
• pconvolution - Convolves image with kernel.
• psetcst - Sets constant to image, graph or region map.
• pdivcst - Divides constant to image, graph or region map.
• pmultcst - Multiplies constant to image, graph or region map.
• paddcst - Adds constant to image, graph or region map.
• paddval - Adds constants stored in collection to image bands.
• psubval - Subtracts constants stored in collection to image bands.
• pmultval - Multiplies image bands with constants stored in collection.
• pdivval - Divides image bands with constants stored in collection.
• plipadd - Performs image addition according to the LIP model.
• plipsub - Performs image subtraction according to the LIP model.
• plipmultcst - Performs scalar multiplication of image according to the LIP model.
• pintegralimage - Calculates the integral image.
• psquareintegralimage - Calculates the square integral image.

Binary and logical operations between image and graph and set operation between region map.

• pand - Performs binary and between images or graphs and intersection between region maps.
• por - Performs binary or between images or graphs and union between region maps.
• pxor - Performs binary xor between images or graphs and symmetrical difference between region maps.
• pinverse - Performs inversion of image or graph and inversion of region map labels.
• pnot - Performs logical negation of image or graph and complementary of region map.
• pmask - Performs masking of image, graph or region map by an image or a region map.

Basic geometrical transformation of image, graph or region map contents.

• paddborder - Performs resizing of image or region map by adding a border.
• pmaxprojection - Performs mean value orthogonal projection along main axis.
• pmeanprojection - Performs mean value orthogonal projection along main axis.
• pextrude1d22d - Performs propagation of value along an axis.
• pflip - Performs flip transformation of image or region map.
• protation - Performs rotation of image or region map.
• ptranslation - Performs translation of image or region map.
• pscrolling - Performs a rolling up translation of image or region map.
• ptransposition - Performs a transposition of image.
• presize - Performs an affine resizing of image or region map.
• prescale - Performs an affine rescaling of image, region map or graph using the nearest neighbor interpolation.
• plinearrescale - Performs an affine rescaling of image using the linear interpolation.
• pbicubicrescale - Performs an affine rescaling of 2D image using the bicubic interpolation.
• pbellcrescale - Performs a rescaling of image using the Bell algorithm.
• phermiterescale - Performs a rescaling of image using the Hermite algorithm.
• planczosrescale - Performs a rescaling of image using the Lanczos algorithm.
• pmitchellrescale - Performs a rescaling of image using the Mitchell algorithm.

Some basic image transformations.

• psetpixel - Sets a given value to a specified pixel.
• ppixelvalue - Gets pixel value from grayscale image and region map.
• paddnoise - Adds artificial noise to image.
• pcliparea - Select rectangular region area of image, region map or graph.
• pcopyborder - Copy image border.
• psetborder - Sets image border to specified value.
• pextractsubimage - Extracts subimage from image.
• pinsertsubimage - Inserts subimage into image.
• pnewimage - Creates a new image from dimensions.
• pshapedesign - Creates a new image with synthetic shape.
• pmergeimages - Merges 4 images into one image.
• psplitimage - Splits image into 4 subimages.
• pgraylevel2depth - Converts gray levels to depth values.
• pdepth2graylevel - Converts depth values to gray levels.
• paddslice - Adds slice to 3D image.
• premoveslice - Removes slice to 3D image.
• pgetband - Gets a band in a multispectral image (or color image).
• psetband - Replace a band in a multispectral image (or color image).
• pgetslice - Gets slice from 3D image as 2D image.
• psetlice - Sets slice to 3D image.
• pgetwindowaroundpoints - Extracts pixels in the window around specified points.

A set of Look-Up Table transformations to perform radiometric corrections.

• pextremumsharpening - Performs contrast sharpening using extremum values.
• plineartransform - Performs linear transform of the gray-levels.
• plogtransform - Performs logarithmic and exponential transforms of the gray-levels.
• ppowerlawtransform - Performs power-law transform of the gray-levels.
• phistogramequalization - Performs contrast stretching using histogram equalization.
• phistogramspecification - Performs contrast stretching using histogram specification.

Spatial linear or non linear filtering.

• pvariancefiltering - Performs variance filtering on image.
• pmedianfiltering - Performs median filtering on image.
• pmeanfiltering - Performs mean filtering on image or graph.
• pnonlocalmedianfiltering - Performs a non local median filtering on image.
• pnonlocalmeanfiltering - Performs a non local mean filtering on image or graph.
• pgaussianfiltering - Performs Gaussian filtering on image.
• pexponentialfiltering - Performs exponential filtering on image.
• padaptivemeanfiltering - Performs adaptive mean filtering on image.
• pderichesmoothing - Performs Deriche filtering on image.
• pshensmoothing - Performs Shen-Castan smoothing on image.
• pmalikperonafiltering - Performs non linear diffusion smoothing.
• pmcmfiltering - Performs Mean Curvature Motion filtering on image.
• pnagaofiltering - Performs Nagao filtering on image.
• poutrangefiltering - Performs outrange filtering on image.
• psigmafiltering - Performs sigma filtering on image.
• psnnfiltering - Performs Symmetric Nearest Neighborhood filtering on image.
• ppeergroupfiltering - Performs Peer Group filtering on color image.
• pdenoisePDE - Performs anisotropic smoothing on image.
• psharp - Performs contrast sharpening using Laplacian unsharp masking.

Approximation of image contents to flat background.

• plinearregression - Approximates image to flat background using linear regression.
• ppolynomialfitting - Approximates image to flat background using polynomial fitting.
• plegendrepolynomialfitting - Approximates image to flat background using Legendre polynomial fitting.

Interpolation of missing pixels.

• plinearinterpolation - Replaces missing pixels by linear interpolation of the neighbors.

Frequency operations. Complex images are represented by two images.

• pfft - Performs Fast Fourier Transform.
• pifft - Performs inverse Fast Fourier Transform.
• pbutterworthfilter - Designs lowpass, highpass, bandpass or bandreject Butterworth filter.
• pgaussianfilter - Designs lowpass, highpass, bandpass or bandreject Gaussian filter.
• pmodulus - Computes modulus between 2 images.
• pphase - Computes phase between 2 images.
• pfftconvolution - Performs convolution of image by kernel.
• pfftdeconvolution - Performs deconvolution of image by kernel.
• pfftcorrelation - Performs correlation between two images.
• pfftshift - Shifts images in FFT image.
• pqmf - Designs Quadratic Mirror Filter for wavelet transform.
• pdwt - Performs Direct Wavelet Transform.
• pidwt - Performs inverse Direct Wavelet Transform.
• psetsubband - Gets one subband image from DWT image.
• pgetsubband - Sets subband into DWT image.

Morphological transformations is based on set operations such as erosion and dilation.

• pdilation - Performs morphological dilation from a list of predefined structuring elements.
• perosion - Performs morphological erosion from a list of predefined structuring elements.
• pnonlocaldilation - Performs a non local dilation with laplacian regularization on image.
• pnonlocalerosion - Performs a non local erosion with laplacian regularization on image.
• psedesign - Builds a structuring element from a list of predefined structuring elements.
• psedilation - Performs morphological dilation with a customized structuring elements.
• pseerosion - Performs morphological erosion with a customized structuring elements.
• plineardilation - Performs dilation with a linear structuring element.
• plinearerosion - Performs linear erosion with a linear structuring element.
• pgeodesicdilation - Performs geodesic dilation.
• pgeodesicerosion - Performs geodesic erosion.
• pdilationreconstruction - Performs reconstruction by dilation.
• perosionreconstruction - Performs reconstruction by erosion.
• pareaopening - Performs area opening (minima killer).
• pareaclosing - Performs area closing (maxima killer).
• pwatershed - Performs the watershed on image.
• phitormiss - Performs hit or miss transformation.
• pskeletonization - Computes the skeleton of 2D objects.
• phomotopicskeletonization - Computes the homotopic skeleton of 3D objects.

Detection of points of interest such as corners or junctions.

• pharris - Performs Harris corner detection.
• psusan - Performs Susan corner detection.

Detection and localization of edges.

• pgradneumann - Computes the discrete gradient by forward finite differences and Neumann boundary conditions.
• pdivneumann - Computes the divergence by backward finite differences.
• pgradient - Computes the gradient magnitude and direction.
• plaplacian - Computes the Laplacian magnitude.
• pprewitt - Computes the Prewitt gradient magnitude.
• proberts - Computes the Roberts gradient magnitude.
• psobel - Computes the Sobel gradient magnitude.
• pderiche - Computes gradient magnitude and maxima localization using Deriche algorithm.
• pshen - Computes gradient magnitude and maxima localization using Shen-Castan's algorithm.
• pgradientthreshold - Estimates the noise level in a gradient image.
• pnonmaximasuppression - Performs non-maxima suppression for edge detection.
• pzerocross - Locates zero crossing.

Contours are chains of connected non null pixels relying on a null background. There are connected according to 8-connexity in 2D and the 26-connexity in 3D. Contour image are grayscale images.

• pdistance - Computes euclidean distance map to nearest contours.
• pdistance1 - Computes distance map to nearest contour.
• pcontourextensionrect - Performs rectangular-shaped extension of end points.
• pcontourextensionconic - Performs cone-shaped extension of end points.
• pblindedgeclosing - Performs edge closing by edge tracking.
• pedgeclosing - Performs edge closing from gradient.
• pedgedirection - Computes the contours direction.
• phoughlines - Detects straight lines from a set of contours.
• ppostthinning - Performs contour postthinning to guaranty 8-connexity (or 26-connexity).
• pellipsoidalapproximation - Performs ellipsoidal approximation of closed contour.
• ppolygonalapproximation - Performs polygonal approximation of contours.
• pbarbremoval - Removes barbs from length.
• pcontourselection - Selects contour chain from length.
• pclosedcontourselection - Selects closed contour from length.
• popencontourselection - Selects open contour from length.

Image segmentation using pixel classification.

• pbinarization - Performs binary thresholding on image or graph from a given threshold value.
• padaptivemeanbinarization - Performs binarization on image using a local adaptive thresholding based on mean value.
• pcorrelationbinarization - Performs binarization on image using maximum correlation criterion.
• pentropybinarization - Performs binarization on image using maximum entropy criterion.
• pniblackbinarization - Performs an adaptive binarization based on local contrast according to W. Niblack algorithm enhanced by J. Sauvola.
• pvariancebinarization - Performs binarization on image using interclass variance criterion.
• pcontrastbinarization - Performs binairization based on the boundary contrast value.
• pmassbinarization - Performs binarization based on gray level percent.
• pthresholding - Performs thresholding on image, region map or graph from a given value.
• pcontrastthresholding - Performs multi-thresholding on image based on the boundary contrast value.
• phistothresholding - Performs multi-thresholding on image using histogram analysis.
• pfuzzyclustering- Performs multi-thresholding using fuzzy k-means algorithm.
• pentropythresholding - Performs multi-thresholding on image based on the entropy value.
• pchanda - Performs multi-thresholding on image using Chanda algorithm.
• pderavi - Performs multi-thresholding on image using Deravi algorithm.
• pfisher - Performs multi-thresholding on image using Fisher algorithm.
• pweszka - Performs multi-thresholding on image using Weszka algorithm.

Region spliting, merging, and aggregation operations.

• pboundarylabeling - Performs region labeling from boundary.
• plabeling - Performs region labeling.
• pcontrastquadtree - Performs quadtree (or octree) segmentation based on contrast uniformity.
• pcontrast1quadtree - Performs quadtree (or octree) segmentation based on contrast criterion.
• pentropyquadtree - Performs quadtree segmentation based on entropy uniformity.
• puniformityquadtree - Performs quadtree (or octree) segmentation based on uniformity degree.
• pvariancequadtree - Performs quadtree (or octree) segmentation based on variance uniformity.
• pcontrastaggregation - Performs pixel aggregation based on contrast criterion.
• pedgebasedragpruning - Cut adjacency link between regions that are separated by an edge.
• pmeanaggregation - Performs pixel aggregation based on mean criterion.
• pgaussaggregation - Performs pixel aggregation based on Gaussian criterion.
• pvarianceaggregation - Performs pixel aggregation based on variance criterion.
• pcontrastmerging - Performs priority region merging based on contrast criterion.
• pentropymerging - Performs priority region merging based on entropy criterion.
• pmeanmerging - Performs priority region merging based on mean criterion.
• pmumfordshahmerging - Performs priority region merging based on Mumford-Shah criterion.
• puniformitymerging - Performs priority region merging based on uniformity criterion.
• pvariancemerging - Performs priority region merging based on variance criterion.
• pboundarymerging - Performs priority region merging based on uniformity criterion.
• phistomerging - Performs priority region merging based on histogram correlation.
• plabelmerging - Merges two regions from label value.
• pinnermerging - Performs inner region merging.
• pinnermostmerging - Performs inner-most region merging.
• pvoronoi - Calculates the Voronoi diagram.
• pcolorquantization - Reduction of the number of colors used to encode an image.
• pgraphbasedsegmentation - Performs pixel classification on image using boundary information between regions.
• pmeanshiftsegmentation Performs pixel classification on image using mean shift algorithm.
• psimplelineariterativeclustering - Performs superpixel segmentation.
• pseedplacement - Placement of seeds on a regular grid.
• psuperpixelsegmentation - Oversegmentation of image into superpixels.

Operations on region map such as region selection and relabeling. Inputs and outputs are region maps.

• pboundaryregularization - Regularizes the region boundary.
• pfillhole - Fills region holes.
• pholeselection - Selects holes in regions.
• pconvexhull - Builds convex hull of regions.
• pboundary - Locates region boundary.
• pboundingbox - Builds the bounding box around regions.
• pcenterofmass - Locates the centre of mass of regions.
• plabelselection - Selects region by label value.
• plabelsselection - Selects regions in the first region map that are also in the second region map.
• pinnerselection - Selects inner regions.
• poutborderselection - Selects regions that do not touch the border.
• plocationselection - Selects regions from their location.
• penergyselection - Selects regions from energy value.
• pmaximumselection - Selects regions from maximum grayscale value.
• pminimumselection - Selects regions from minimum grayscale value.
• pmeanselection - Selects regions from mean grayscale value.
• pvarianceselection - Selects regions from variance factor.
• pcompactnessselection - Selects regions from compactness factor.
• pconvexityselection - Selects regions from convexity degree.
• pdensityselection - Selects regions from density factor.
• pelongationselection - Selects regions from elongation factor.
• peulernumberselection - Selects regions from Euler number.
• peccentricityselection - Selects regions from eccentricity degree.
• porientationselection - Selects regions from orientation degree.
• pperimeterselection - Selects regions from perimeter length.
• prectangularityselection - Selects regions from rectangularity degree.
• psphericityselection - Selects regions from sphericity degree.
• psizeselection - Selects regions from size.
• pareaselection - Selects regions from area size.
• pvolumeselection - Selects regions from volume factor.
• prelabelingfromarray - Relabels regions from label array.
• prelabelingwithgraph - Relabels region and related graph node.

Region topological, geometrical, and photometric measurements.

• pareadisorderfactor - Measures area disorder factor.
• pregioncompactness - Measures region compactness factor.
• pregionconvexity -Measures region convexity degree.
• pregiondensity -Measures region density factor.
• pregionelongation - Measure region elongation factor.
• pregionenergy -Measures region energy value.
• pregioneulernumber - Measures region Euler number.
• pregioneccentricity - Measures region eccentricity degree.
• pregionmaximum - Measures region maximum grayscale value.
• pregionminimum - Measures region minimum grayscale value.
• pregionmean -Measures region mean grayscale value.
• pregionorientation -Measures region orientation degree.
• pregionperimeter - Measures region perimeter length.
• pregionrectangularity - Measures region rectangularity degree.
• pregionsphericity - Measures region sphericity degree.
• pregionvariance - Measures region variance.
• pregionarea - Measures region area size.
• pregionvolume - Measures region volume.
• pregionwidth - Measures region width.
• pregionheight - Measures region height.
• pregiondepth - Measures region depth.

Features extraction for images.

• plocalextrema - Computes local extremum values of grayscale image.
• plocalmaxima - Computes local maximum values of grayscale image or graph.
• plocalminima - Computes local minimum values of grayscale image or graph.
• pregionalminima - Computes regional minimum values of grayscale image.
• pregionalmaxima - Computes regional maximum values of grayscale image.
• pcontrastvalue - Measures the global contrast value of grayscale image or graph.
• pcontrast1value - Measures the global contrast value of grayscale image or graph.
• penergyvalue - Measures global energy of grayscale image or graph.
• pentropyvalue - Measures global entropy of grayscale image or graph.
• psumvalue - Measures global sum of grayscale image or graph.
• pvariancevalue - Measures global variance of grayscale image or graph.
• pmaximumvalue - Measures global maximum value of image, region map or graph.
• pminimumvalue - Measures global minimum value of image, region map or graph.
• pmeanvalue - Measures global mean value of grayscale image or graph.
• pmedianvalue - Measures median value of grayscale image.
• pmodevalue - Measures the pixel value that occurs the most frequently in an image.
• pvaluenumber - Returns the amount of non null pixels of image, region map or graph.
• pvalueclassnumber - Counts the number of different used values of image, region map or graph.
• pvaluerank - Gets the nth value for image, region map or graph.
• phistogram - Creates histogram from grayscale image.

Discrepancy and goodness measures for assessing image processing quality.

• passessdetectionaccuracy - Assesses region detection accuracy of a segmentation result by comparison with a reference segmentation.
• passessfragmentationconsistency - Assesses region fragmentation consistency of a segmentation result by comparison with a reference segmentation.
• passessboundaryprecision - Assesses regio nboundary precision of a segmentation result by comparison with a reference segmentation.
• passessshapefidelity - Assesses region shape fidelity of a segmentation result by comparison with a reference segmentation.
• passesstopologypreservation - Assesses region topology preservation of a segmentation result by comparison with a reference segmentation.
• passesssegmentationalgorithm -Evaluation of segmentation algorithm performances based on discrepancy measures between segmentation results and reference segmentations.
• pranksegmentationalgorithms - Image segmentation algorithms ranking from their performances on test images.
• pranksegmentationalgorithmsfromfolders - Image segmentation algorithms ranking from their performances on test images (full).
• pdisplayperformancevalues - Pretty prints segmentation errors computed with operator 'passesssegmentationalgorithm.'
• pvinet - Computes the discrepancy measure between two region maps based on the number of mis-segmented pixels.
• pborsotti - Computes the goodness measure based on the number, area and variance of regions.
• pzeboudj - Computes the goodness measure based on inter and intra-region contrast.
• pinterregioncontrast - Computes the goodness measure based on inter-region contrast.
• pintraregionuniformity - Computes the goodness measure based on intra-region uniformity.
• pmse - Computes the Mean Square Error.
• ppsnr - Computes the Peak Signal to Noise Ratio.
• psnr - Computes the Signal-to-Noise Ratio.

Motion reconstruction.

• pblockmatching - Motion estimation between 2 images using block matching.
• pplotquiver - Renders vector field from multispectral images with 2 bands.
• pregistrationPDE - Computes the displacement field between two input images.

Reconstruction of surface and orientation.

• pgetquadrangle - Select the best quadrangle among a set of lines.
• pquadrangle2rectangle - Correction of the geometrical distortion so as to transform a quadrangle into a rectangle.
• pskewanglecorrection - Detect and correct a skew deviation of an image content.

• pcrosscorrelation - Cross-correlation between an image and a pattern.

Collection contents management. A collection is a bundle of values and Pandore objects identified by a name.

• pcolcatenateitem - Concatenates two collections.
• pcolremoveitem - Removes item from collection.
• pcolrenameitem - Renames item in collection.
• pcolgetvalue - Gets numerical value from a collection.
• pcolsetvalue - Sets numerical value to collection.
• pcolgetimages - Extracts images from collection.
• pcolgetobject - Gets Pandore object from collection.
• pcolsetobject - Sets Pandore object to collection.
• pobject2col - Creates collection from Pandore object.
• pcol2csv - Converts a collection to a csv file.
• pcol2txt - Converts collection to text file.
• ptxt2col - Builds a collection from text file.

Arithmetic operations on array stored as collections.

• pcreatearray - Creates array in collection.
• parray2array - Coverts array type.
• parraygetvalue - Gets value from array.
• parraysize - Returns the size of array in a collection.
• parrayargmax - Calculates the maximum values between arrays.
• parraycovarmat - Calculates covariance matrix of arrays items.
• parraymean - Calculates the mean value of array.
• parraymedian - Calculates the median value of array.
• parraymode - Calculates the most frequently value in array.
• parrayeuclideannorm - Calculates euclidean norm of arrays items.
• parraynorm - Performs normalization between 0 and 1 of items of one array.
• parraysnorm - Performs normalization between 0 and 1 of items of several arrays.
• parraysmin - Computes the minimum values of several arrays in a collection.
• parraysmax - Computes the maximum values of several arrays in a collection.
• parraysmean - Computes the mean values of several arrays in a collection.
• pcorrelationcoefficient - Calculates the correlation cofficient between two arrays of values.

Operations on graph. A graph is a set of vertices (nodes) linked by weighted edges. A vertex (node) references an item (region, point, ...) in an array.

• pbetagraph - Builds the beta graph.
• psig - Builds the Sphere of InfluCalculates the correlation cofficient between two arrays of valuesence Graph.
• pmst - Builds the Minimum Spanning Tree of graph.
• pdelaunay - Builds the Delaunay graph from region map.
• pgraphpruning - Performs graph pruning.
• pedgecutting - Perform edge cutting.
• pleafcutting - Performs leaf cutting.
• pgraphneighbours - Valuates nodes with the number of neighbours.
• pgraphvisu - Visualizes node and edge of graph.
• pedgevisu - Visualization of graph edge weights.
• pnodevisu - Visualizes graph node values.
• pnodedisc - Visualizes graph node values.

Object classification. Object can be anything like pixel or region.

• pgaussclassification - Performs gauss clustering on a set of objects.
• pkmeans - Performs K-means clustering on a set of objects.
• pknn - Performs K-nearest neighbors clustering on a set of objects.

Displaying graphically or textually Pandore object contents.

• pvisu - Displays Pandore object.
• pdraw - Draws by hand onto Pandore object.
• pcontentsdisplay - Displays the contents of Pandore object.
• pplot1d - Renders a plot of a 1D function as a color image.
• pcolorcube - Creates the RGB cube of image color repartition.
• pcolorize - Colorization of regions with internal average value.
• psuperimposition - Superimposition of contours onto an image.

Displaying information about Pandore objects.

• pproperty - Gets Pandore object attribute value.
• pfile - Displays properties of Pandore file.
• psetstatus - Sets the current status value.
• pstatus - Prints out the value returned by the last executed operator.
• pman - Finds and displays reference manual pages.
• pversion - Prints the current Pandore version number.

Some miscellaneous image operations not in direct relationship with image processing.

• prds - Builds Random Dot Stereogram.
• pstereogram - Builds Autostereogram.
• psubsampling - Performs image subsampling.