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R
OpenImageR

down_sample_image

downsampling an image ( by a factor ) using gaussian blur

Description

downsampling an image ( by a factor ) using gaussian blur

Usage

down_sample_image(
  image,
  factor,
  gaussian_blur = FALSE,
  gauss_sigma = 1,
  range_gauss = 2
)

Arguments

image

matrix or 3-dimensional array
factor

a positive number greater or equal to 1.0
gaussian_blur

a boolean (TRUE,FALSE) specifying if gaussian blur should be applied when downsampling
gauss_sigma

float parameter sigma for the gaussian filter
range_gauss

float number specifying the range of values for the gaussian filter

Details

This function downsamples an image with the option to use gaussian blur for optimal output.

Value

depending on the input, either a matrix or an array

Author(s)

Lampros Mouselimis

Examples

path = system.file("tmp_images", "2.jpg", package = "OpenImageR")

image = readImage(path)

dsamp = down_sample_image(image, factor = 2.0, gaussian_blur = TRUE)
OpenImageR

An Image Processing Toolkit

v1.1.8
GPL-3
Authors
Lampros Mouselimis [aut, cre] (<https://orcid.org/0000-0002-8024-1546>), Sight Machine [cph] (findHOGFeatures function of the SimpleCV computer vision platform), Johannes Buchner [cph] (average_hash, dhash and phash functions of the ImageHash python library), Mohammad Haghighat [cph] (Gabor Feature Extraction), Radhakrishna Achanta [cph] (Author of the C++ code of the SLIC and SLICO algorithms (for commercial use please contact the author))
Initial release
2021-05-04

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