Return pixel value at coordinates
Generates a "dirac" image, i.e. with all values set to 0 except one.
Label connected components.
Capture the current R plot device as a cimg image
Return image patches
Convert a cimg object to a raster object
Mirror image content along specified axis
Estimate displacement field between two images.
Interpolate image values
Convert cimg to spatstat im object
Save image
Photograph of sailing boats from Kodak set
Split an image along axis, apply function, return a data.frame
Rotate image by an arbitrary angle, around a center point.
Create an image from a data.frame
Split a colour image into a list of separate channels
Compute the periodic part of an image, using the periodic/smooth decomposition of Moisan (2009)
Create a cimg object
Compute Euclidean distance function to a specified value.
Split an image along a certain axis (producing a list)
Autocrop image region
Split an image along a certain axis (producing a list)
Compute the Discrete Fourier Transform of an image
Image dimensions
Combining images
Correlation of image by filter
Resize image to new dimensions.
If pd[x,y,z,v]<0, it corresponds to a percentage of the original size (the default value is -100).
Add colour channels to an grayscale image
Split an image along axis, apply function, return a list
Convert an RGB image to grayscale
Blur image isotropically.
Convert to cimg object
Bucket fill
Center stencil at a location
Display image list using CImg library
Split a video into separate frames
Image warping
Pad image with n pixels along specified axis
Split an image, apply function, recombine the results as an image
Convert a pixel image to a data.frame
Convert an image in spatstat format to an image in cimg format
Apply function to each element of a list, then combine the result as an image by appending along specified axis
Compute field of diffusion tensors for edge-preserving smoothing.
Rotate image by an arbitrary angle.
Load image from file or URL
Sharpen image.
Return pixel values in a neighbourhood defined by a stencil
Permute image axes
Play a video
Select a region of homogeneous colour
Generate (Gaussian) white-noise image
Threshold grayscale image
Compute watershed transform.
A cross-shaped stencil
Blur image anisotropically, in an edge-preserving way.
Compute Haar multiscale wavelet transform.
Blur image with a box filter.
Create an image of custom size by filling in repeated values
Display an image using base graphics
Warp image
Apply recursive Deriche filter.
Resize image uniformly
Remove empty dimensions from an array
Display image using CImg library
Blur image with the median filter.
Select part of an image
Array subset operator for cimg objects
Turn an numeric array into a cimg object
Combine a list of images into a single image
Various shortcuts for extracting colour channels, frames, etc
Erode/dilate image by a structuring element.
imager: an R library for image processing, based on CImg
Linear index in internal vector from pixel coordinates
Blur image with a box filter (square window)
Convolve image by filter.
Compute image hessian.
Return image hessian.
Return coordinates of subset of pixels
Compute image gradient
Draw image on another image
Shift image content.
Returns the pixel grid for an image
Create an image by sampling a function
Compute image gradient.
Colour space conversions in imager
Renormalise image
Van Vliet recursive Gaussian filter.