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Image Processing

activecontour() Segment image into foreground and background using activecontour.
adapthisteq() Contrast-limited adaptive histogram equalization (CLAHE).
adaptthresh() Adaptive image threshold using local first-order statistics.
analyze75info() Read metadata from header file of Analyze 7.5 data set.
analyze75read() Read image data from image file of Analyze 7.5 data set.
applycform() Apply device-independent color space transformation.
applylut() Neighborhood operations on binary images using lookup tables.
bestblk() Determine optimal block size for block processing.
blockproc() Distinct block processing for image.
boundarymask() Find region boundaries of segmentation.
bwarea() Area of objects in binary image.
bwareafilt() Extract objects from binary image by size.
bwareaopen() Remove small objects from binary image.
bwboundaries() Trace region boundaries in binary image.
bwconncomp() Find connected components in binary image.
bwconvhull() Generate convex hull image from binary image.
bwdist() Distance transform of binary image.
bwdistgeodesic() Geodesic distance transform of binary image.
bweuler() Euler number of binary image.
bwhitmiss() Binary hit-miss operation.
bwlabel() Label connected components in 2-D binary image.
bwlabeln() Label connected components in binary image.
bwlookup() Nonlinear filtering using lookup tables.
bwmorph() Morphological operations on binary images.
bwpack() Pack binary image.
bwperim() Find perimeter of objects in binary image.
bwpropfilt() Extract objects from binary image using properties.
bwselect() Select objects in binary image.
bwtraceboundary() Trace object in binary image.
bwulterode() Ultimate erosion.
bwunpack() Unpack binary image.
checkerboard() Create checkerboard image.
col2im() Rearrange matrix columns into blocks.
colfilt() Columnwise neighborhood operations.
conndef() Create connectivity array.
convmtx2() 2-D convolution matrix.
corr2() 2-D correlation coefficient.
cp2tform() Infer spatial transformation from control point pairs.
cpcorr() Tune control-point locations using cross correlation.
cpselect() Control Point Selection Tool.
cpstruct2pairs() Convert CPSTRUCT to valid pairs of control points.
dct2() 2-D discrete cosine transform.
dctmtx() Discrete cosine transform matrix.
deconvblind() Deblur image using blind deconvolution.
deconvlucy() Deblur image using Lucy-Richardson method.
deconvreg() Deblur image using regularized filter.
deconvwnr() Deblur image using Wiener filter.
decorrstretch() Apply decorrelation stretch to multichannel image.
demosaic() Convert Bayer pattern encoded image to truecolor image.
dicomanon() Anonymize DICOM file.
dicomdict() Get or set active DICOM data dictionary.
dicomdisp() Display DICOM file structure.
dicominfo() Read metadata from DICOM message.
dicomlookup() Find attribute in DICOM data dictionary.
dicomread() Read DICOM image.
dicomuid() Generate DICOM unique identifier.
dicomwrite() Write images as DICOM files.
dpxinfo() Read metadata from DPX file.
dpxread() Read DPX image.
edge() Find edges in intensity image.
edgetaper() Taper discontinuities along image edges.
entropy() Entropy of grayscale image.
entropyfilt() Local entropy of grayscale image.
fan2para() Convert fan-beam projections to parallel-beam.
fanbeam() Fan-beam transform.
fft2() 2-D fast Fourier transform.
fftshift() Shift zero-frequency component to center of spectrum.
findbounds() Find output bounds for spatial transformation.
fitgeotrans() Fit geometric transformation to control point pairs.
fliptform() Flip input and output roles of TFORM structure.
freqz2() 2-D frequency response.
fsamp2() 2-D FIR filter using frequency sampling.
fspecial() Create predefined 2-D filter.
ftrans2() 2-D FIR filter using frequency transformation.
fwind1() 2-D FIR filter using 1-D window method.
fwind2() 2-D FIR filter using 2-D window method.
gabor() Create Gabor filter or Gabor filter bank.
getimage() Image data from axes.
getimagemodel() Image model object from image object.
getline() Select polyline with mouse.
getpts() Specify points with mouse.
getrangefromclass() Default display range of image based on its class.
getrect() Specify rectangle with mouse.
gradientweight() Calculate weights for image pixels based on image gradient.
gray2ind() Convert grayscale or binary image to indexed image.
graycomatrix() Create gray-level co-occurrence matrix from image.
grayconnected() Select contiguous image region with similar gray values.
graycoprops() Properties of gray-level co-occurrence matrix.
graydiffweight() Calculate weights for image pixels based on grayscale intensity difference.
graydist() Gray-weighted distance transform of grayscale image.
grayslice() Convert grayscale image to indexed image using multilevel thresholding.
graythresh() Global image threshold using Otsu's method.
hdrread() Read high dynamic range (HDR) image.
hdrwrite() Write Radiance high dynamic range (HDR) image file.
histeq() Enhance contrast using histogram equalization.
hough() Hough transform.
houghlines() Extract line segments based on Hough transform.
houghpeaks() Identify peaks in Hough transform.
hsv2rgb() Convert HSV colormap to RGB colormap.
iccfind() Search for ICC profiles.
iccread() Read ICC profile.
iccroot() Find system default ICC profile repository.
iccwrite() Write ICC color profile to disk file.
idct2() 2-D inverse discrete cosine transform.
ifanbeam() Inverse fan-beam transform.
ifft2() 2-D inverse fast Fourier transform.
ifftshift() Inverse FFT shift.
im2bw() Convert image to binary image, based on threshold.
im2col() Rearrange image blocks into columns.
im2double() Convert image to double precision.
im2int16() Convert image to 16-bit signed integers.
im2java2d() Convert image to Java buffered image.
im2single() Convert image to single precision.
im2uint16() Convert image to 16-bit unsigned integers.
im2uint8() Convert image to 8-bit unsigned integers.
imabsdiff() Absolute difference of two images.
imadd() Add two images or add constant to image.
imadjust() Adjust image intensity values or colormap.
imageinfo() Image Information tool.
imagemodel() Image Model object.
imapplymatrix() Linear combination of color channels.
imapprox() Approximate indexed image by reducing number of colors.
imbinarize() Binarize image by thresholding.
imbothat() Bottom-hat filtering.
imboxfilt() 2-D box filtering of images.
imboxfilt3() 3-D box filtering of 3-D images.
imclearborder() Suppress light structures connected to image border.
imclose() Morphologically close image.
imcolormaptool() Choose Colormap tool.
imcomplement() Complement image.
imcontour() Create contour plot of image data.
imcontrast() Adjust Contrast tool.
imcrop() Crop image.
imdilate() Dilate image.
imdisplayrange() Display Range tool.
imdistline() Distance tool.
imdivide() Divide one image into another or divide image by constant.
imellipse() Create draggable ellipse.
imerode() Erode image.
imextendedmax() Extended-maxima transform.
imextendedmin() Extended-minima transform.
imfill() Fill image regions and holes.
imfilter() N-D filtering of multidimensional images .
imfindcircles() Find circles using circular Hough transform.
imfinfo() Information about graphics file
imfreehand() Create draggable freehand region.
imfuse() Composite of two images.
imgaborfilt() Apply Gabor filter or set of filters to 2-D image.
imgaussfilt() 2-D Gaussian filtering of images.
imgaussfilt3() 3-D Gaussian filtering of 3-D images.
imgca() Get handle to current axes containing image.
imgcf() Get handle to current figure containing image.
imgetfile() Open Image dialog box.
imgradient() Gradient magnitude and direction of an image.
imgradient3() Find 3-D gradient magnitude and direction of images.
imgradientxy() Directional gradients of an image.
imgradientxyz() Find the directional gradients of a 3-D image.
imguidedfilter() Guided filtering of images.
imhandles() Get all image handles.
imhist() Histogram of image data.
imhistmatch() Adjust histogram of image to match N-bin histogram of reference image .
imhmax() H-maxima transform.
imhmin() H-minima transform.
imimposemin() Impose minima.
imlincomb() Linear combination of images.
imline() Create draggable, resizable line.
immagbox() Magnification box for scroll panel.
immovie() Make movie from multiframe image.
immse() Mean-squared error .
immultiply() Multiply two images or multiply image by constant.
imnoise() Add noise to image.
imopen() Morphologically open image.
imoverlay() Burn binary mask into 2-D image.
imoverview() Overview tool for image displayed in scroll panel.
imoverviewpanel() Overview tool panel for image displayed in scroll panel.
impixel() Pixel color values.
impixelinfo() Pixel Information tool.
impixelinfoval() Pixel Information tool without text label.
impixelregion() Pixel Region tool.
impixelregionpanel() Pixel Region tool panel.
implay() Play movies, videos, or image sequences.
impoint() Create draggable point.
impoly() Create draggable, resizable polygon.
improfile() Pixel-value cross-sections along line segments.
impyramid() Image pyramid reduction and expansion.
imquantize() Quantize image using specified quantization levels and output values.
imread() Read Image from Graphics File.
imreconstruct() Morphological reconstruction.
imrect() Create draggable rectangle.
imregconfig() Configurations for intensity-based registration.
imregcorr() Estimates geometric transformation that aligns two 2-D images using phase correlation.
imregdemons() Estimate displacement field that aligns two 2-D or 3-D images.
imregionalmax() Regional maxima.
imregionalmin() Regional minima.
imregister() Intensity-based image registration.
imregtform() Estimate geometric transformation that aligns two 2-D or 3-D images.
imresize() Resize image.
imrotate() Rotate image.
imsave() Save Image Tool.
imscrollpanel() Scroll panel for interactive image navigation.
imsegfmm() Binary image segmentation using Fast Marching Method.
imseggeodesic() Segment image into two or three regions using geodesic distance-based color segmentation.
imsharpen() Sharpen image using unsharp masking.
imshow() Display image.
imshowpair() Compare differences between images.
imsubtract() Subtract one image from another or subtract constant from image.
imtool() Image Viewer app.
imtophat() Top-hat filtering.
imtransform() Apply 2-D spatial transformation to image.
imtranslate() Translate image.
imwarp() Apply geometric transformation to image.
imwrite() Write image to graphics file.
ind2gray() Convert indexed image to grayscale image.
ind2rgb() Convert indexed image to RGB image.
integralBoxFilter() 2-D box filtering of integral images.
integralBoxFilter3() 3-D box filtering of 3-D integral images.
integralImage() Calculate integral image.
integralImage3() Calculate 3-D integral image.
interfileinfo() Read metadata from Interfile file.
interfileread() Read images in Interfile format.
intlut() Convert integer values using lookup table.
iptaddcallback() Add function handle to callback list.
iptcheckconn() Check validity of connectivity argument.
iptcheckhandle() Check validity of handle.
iptcheckmap() Check validity of colormap.
iptgetapi() Get Application Programmer Interface (API) for handle.
iptGetPointerBehavior() Retrieve pointer behavior from HG object.
iptgetpref() Get values of Image Processing Toolbox preferences.
ipticondir() Directories containing IPT and MATLAB icons.
iptPointerManager() Create pointer manager in figure.
iptprefs() Display Image Processing Toolbox Preferences dialog box.
iptremovecallback() Delete function handle from callback list.
iptSetPointerBehavior() Store pointer behavior structure in Handle Graphics object.
iptsetpref() Set Image Processing Toolbox preferences or display valid values.
iptwindowalign() Align figure windows.
iradon() Inverse Radon transform.
isicc() True for valid ICC color profile.
isrset() Check if file is R-Set.
lab2double() Convert L*a*b* data to double.
lab2rgb() Convert CIE 1976 L*a*b* to RGB.
lab2uint16() Convert L*a*b* data to uint16.
lab2uint8() Convert L*a*b* data to uint8.
lab2xyz() Convert CIE 1976 L*a*b* to CIE 1931 XYZ.
label2idx() Convert label matrix to cell array of linear indices.
label2rgb() Convert label matrix into RGB image.
labelmatrix() Create label matrix from bwconncomp structure.
makecform() Create color transformation structure.
makeConstrainToRectFcn() Create rectangularly bounded drag constraint function.
makehdr() Create high dynamic range image.
makelut() Create lookup table for use with bwlookup.
makeresampler() Create resampling structure.
maketform() Create spatial transformation structure (TFORM).
mat2gray() Convert matrix to grayscale image.
mean2() Average or mean of matrix elements.
medfilt2() 2-D median filtering.
montage() Display multiple image frames as rectangular montage.
multithresh() Multilevel image thresholds using Otsu's method.
nlfilter() General sliding-neighborhood operations.
normxcorr2() Normalized 2-D cross-correlation.
ntsc2rgb() Convert NTSC values to RGB color space.
openrset() Open R-Set file.
ordfilt2() 2-D order-statistic filtering.
otf2psf() Convert optical transfer function to point-spread function.
otsuthresh() Global histogram threshold using Otsu's method.
padarray() Pad array.
para2fan() Convert parallel-beam projections to fan-beam.
phantom() Create head phantom image.
poly2mask() Convert region of interest (ROI) polygon to region mask.
psf2otf() Convert point-spread function to optical transfer function.
psnr() Peak Signal-to-Noise Ratio (PSNR) .
qtdecomp() Quadtree decomposition.
qtgetblk() Block values in quadtree decomposition.
qtsetblk() Set block values in quadtree decomposition.
radon() Radon transform.
rangefilt() Local range of image.
regionfill() Fill in specified regions in image using inward interpolation.
regionprops() Measure properties of image regions.
rgb2gray() Convert RGB image or colormap to grayscale.
rgb2hsv() Convert RGB colormap to HSV colormap.
rgb2lab() Convert RGB to CIE 1976 L*a*b*.
rgb2ntsc() Convert RGB color values to NTSC color space.
rgb2xyz() Convert RGB to CIE 1931 XYZ.
rgb2ycbcr() Convert RGB color values to YCbCr color space.
roicolor() Select region of interest (ROI) based on color.
roifilt2() Filter region of interest (ROI) in image.
roipoly() Specify polygonal region of interest (ROI).
rsetwrite() Create reduced resolution data set from image file.
ssim() Structural Similarity Index (SSIM) for measuring image quality .
std2() Standard deviation of matrix elements.
stdfilt() Local standard deviation of image.
stretchlim() Find limits to contrast stretch image.
subimage() Display multiple images in single figure.
superpixels() 2-D superpixel oversegmentation of images.
tformarray() Apply spatial transformation to N-D array.
tformfwd() Apply forward spatial transformation.
tforminv() Apply inverse spatial transformation.
tonemap() Render high dynamic range image for viewing.
truesize() Adjust display size of image.
visboundaries() Plot region boundaries.
viscircles() Create circle.
warp() Display image as texture-mapped surface.
watershed() Watershed transform.
whitepoint() XYZ color values of standard illuminants.
wiener2() 2-D adaptive noise-removal filtering.
xyz2double() Convert XYZ color values to double.
xyz2lab() Convert CIE 1931 XYZ to CIE 1976 L*a*b*.
xyz2rgb() Convert CIE 1931 XYZ to RGB.
xyz2uint16() Convert XYZ color values to uint16.
ycbcr2rgb() Convert YCbCr color values to RGB color space.