image
Display a matrix as a color image.
Display a scaled version of the matrix A as a color image.
Display the image IM, where IM can be a 2-dimensional (gray-scale
image) or a 3-dimensional (RGB image) matrix.
Read images from various file formats.
Write image from octave to various file formats
Read image information from a file.
Get image size from file FILENAME.
Write the bitmap X into FILE (8-bit indexed uncompressed).
Read a JPEG file from disk.
Write a JPEG file to disc.
Read a PNG file from disk.
Writes a png file to the disk using the Red, Green, Blue and Alpha
matrices.
imcrop
Not implemented.
Applies any geometric transformation to the image IM.
Applies the spatial perspective homogeneous transformation P to the
image IM.
Scales the image A by a factor M using nearest neighbour interpolation.
Rotation of a 2D matrix about its center.
Rotation of a 2D matrix.
Translate a 2D image by (x,y) using Fourier interpolation.
Applies a shear to the image M.
Pad (augment) a matrix for application of image processing algorithms.
Pads an array in a configurable way.
Arbitrary rotation and scaling of a gray-scale image using fast
bilinear interpolation.
Convolve 2 dimensional signals using the FFT.
Returns the correlation coefficient between I and J.
Shows the histogram of an image using hist.
Returns the mean value for a 2d real type matrix.
Returns the standard deviation for a 2d real type matrix.
Performs quadtree decomposition.
Obtain block values from a quadtree decomposition.
Set block values in a quadtree decomposition.
Calculates the gray-level co-occurrence matrix P of a gray-level image
IM.
Calculate the straight line Hough transform of a binary image I.
Compute global image threshold using Otsu's method.
Apply filter to matrix blocks
Create spatial filters for image processing.
Histogram equalization of a gray-scale image.
Adjust image or colormap values to a specified range
Adds noise to image in A.
Two dimensional median filtering.
Two dimensional ordered filtering.
Implementation of two-dimensional ordered filtering.
Computes matrix B by using A as an index to lookup table LUT.
Finds limits to contrast stretch an image
Create a lookup table which can be used by applylut.
Uses lookup tables to perform a neighbour operation on binary images.
Return edge detector image of A image according to an algorithm by
Rachid Deriche.
Estimates the area of the "on" pixels of BW.
Computes the distance transform of the binary image BW.
Calculates the Euler number of a binary image.
Perform a flood-fill operation on the binary image BW1.
Labels foreground objects in the binary image BW.
Perform a morphological operation on a binary image.
Find the perimeter of objects in binary images.
Select connected regions in a binary image.
Perform a dilation morphological operation on a binary image.
Perform an erosion morphological operation on a binary image.
Finds the borders of foreground objects in a binary image.
Find image edges.
Creates a connectivity array.
Reorders colors in a colormap.
Finds colormap with unique colors and corresponding image.
imapprox
Not implemented.
rgb2ycbcr
Not implemented.
ycbcr2rgb
Not implemented.
dither
Not implemented.
Convert a gray scale intensity image to an Octave indexed image.
creates an indexed image X from an intensitiy image I using multiple
threshold levels.
Converts image data types to a black-white (binary) image.
Converts the input image to an image of class double.
Converts the input image to an image of class uint8.
Converts the input image to an image of class uint16.
Convert an Octave indexed image to a gray scale intensity image.
Convert an indexed image to red, green, and blue color components.
Returns true for a black-white (binary) image.
Returns true for an gray-scale intensity image.
Returns true for an index image.
Returns true if parameter is a RGB image.
Converts a matrix to a intensity image.
Converts an RGB image to a gray scale image, or a color map to a gray
map.
Convert and RGB image to an Octave indexed image.
Converts a labeled image to an RGB image.
Create color colormap.
lines
Not implemented.
colorcube
Not implemented.
vga
Not implemented.
Return a gray colormap that maximizes the contrast in an image.
Define a colour map which smoothly traverses the given colors.
Select a Region Of Interest of an image based on color.
roifill
Not implemented.
roifilt2
Not implemented.
roipoly
Not implemented.
Convert a polygon to a region mask.
Calculates the best size of block for block processing.
Processes image in blocks using user-supplied function.
Processes image in sliding blocks using user-supplied function.
Rearranges image blocks into columns.
Rearranges matrix columns into blocks.