An Image Processing Toolkit

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Documentation for package ‘OpenImageR’ version 1.3.0

• DESCRIPTION file.
• User guides, package vignettes and other documentation.
• Package NEWS.

Help Pages

Augmentation	image augmentations of a matrix, data frame, array or a list of 3-dimensional arrays (where the third dimension is equal to 3)
average_hash	calculation of the 'average hash' of an image
convolution	convolution
cropImage	crop an image
dhash	calculation of the 'dhash' of an image
dilationErosion	Dilation or Erosion of an image
down_sample_image	downsampling an image ( by a factor ) using gaussian blur
edge_detection	edge detection (Frei_chen, LoG, Prewitt, Roberts_cross, Scharr, Sobel)
flipImage	flip image horizontally or vertically
GaborFeatureExtract	Gabor Feature Extraction
gamma_correction	Gamma correction
getAffineTransform	Get Affine Transform
hash_apply	calculate the binary or the hexadecimal hash for a matrix, array or a folder of images for the average_hash, phash or dhash functions
HOG	calculate the HOG (Histogram of oriented gradients) for an image
HOG_apply	calculate the HOG (Histogram of oriented gradients) for a matrix, array or a folder of images
imageShow	display an image
image_thresholding	image thresholding
invariant_hash	invariant hashing (caclulation of the hamming or the levenshtein distance when the image is flipped, rotated or cropped)
List_2_Array	convert a list of matrices to an array of matrices
load_binary	loads either 2- or 3-dimensional data (where the third dimension is equal to 3) from a binary file
MinMaxObject	minimum and maximum values of vector, matrix, data frame or array
NormalizeObject	normalize a vector, matrix or array (in the range between 0 and 1)
norm_matrix_range	Normalize a matrix to specific range of values
padding	Padding of matrices or n-dimensional arrays with a user specified value
phash	calculation of the 'phash' of an image
readImage	this function reads various types of images
resizeImage	resize an image using the 'nearest neighbors' or the 'bilinear' method
rgb_2gray	convert an RGB image to Gray
RGB_to_HSV	Conversion of RGB to HSV colour type
RGB_to_Lab	Conversion of RGB to Lab colour type
rotateFixed	Rotate an image by 90, 180, 270 degrees
rotateImage	Rotate an image using the 'nearest' or 'bilinear' method
superpixels	SLIC and SLICO superpixel implementations
superpixel_bbox	Bounding box for the superpixel labels
superpixel_bbox_subset	Bounding box for a subset of superpixel labels
translation	image translation
uniform_filter	uniform filter (convolution with uniform kernel)
verify_image_extension	Verify that the input image extension is valid
warpAffine	Warp Affine
writeImage	This function writes 2- or 3-dimensional image (where the third dimension is equal to 3) data to a file
ZCAwhiten	zca whiten of an image