compress: Compress square to circle
In bwimage: Describe Image Patterns in Natural Structures

Description Usage Arguments Value Author(s) References Examples

Compress data from square image to circular in binary matrix

1	compress(imagematrix, method = "radial", background = NA)

`imagematrix`	The matrix to be compressed.
`method`	Compress algorithm. Four algorithms (radial, shirley, squircle, and elliptical) are available to stretch the image. The algorithms were adapted from Lambers 2016.
`background`	Code for background cell value. When compressing a squared matrix, corners of the transformed matrix will no have corresponding pixel from original matrix. Thus, the background value will be the value of transformed matrix corners.

A matrix of 0, 1 and NA representing white, black and transparent pixels, respectively.

Carlos Biagolini-Jr.

Lambers 2016 Mappings between Sphere, Disc, and Square. Journal of Computer Graphics Techniques, 5(2): 1-21.

1
2
3

img_location <- system.file("extdata/chesstable.png",package ="bwimage")
image_matrix<- threshold_color(img_location,"png", "frame_fixed",target_width = 50,target_height=50)
compress(image_matrix,method="radial")