stretch: stretch circle to square
In biagolini/bwimage: Describe Image Patterns in Natural Structures

Description Usage Arguments Value Author(s) References Examples

Stretch data from circular image to square in binary matrix

1	stretch(imagematrix, method = "radial")

`imagematrix`	The matrix to be stretched.
`method`	Stretch algorithm. Four algorithms (radial, shirley, squircle, and elliptical) are available to stretch the image. The algorithms were adapted from Lambers 2016.

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.

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