extractor: Image rotation, de-skewing, and cropping

In ctross/DieTryin: A package for running network-structured economic games

Image rotation, de-skewing, and cropping

Description

This is a helper function to extract the game board images from an arbitrary photograph.

Usage

extractor(
  image,
  locations,
  histogram_balancing = FALSE,
  direction = "backward"
)

Arguments

image	The image, stored in "imager" format, to be processed. Supplied via the pre-processing code.
locations	Locations of the corners of the game boards in the image file. Supplied via the pre-processing code.
histogram_balancing	Should histogram balancing be used to correct grey-out images? This sometimes helps, but sometimes hurts, classification accuracy. This will cause token hue to shift as well, so hue thresholds will need to be revised if this is used.
direction	How image skew is corrected. The "forward" algorithm is fast but lower quality. The "backward" algorithm is slow but higher quality. See imwarp function in imager package for technical details.

Value

A square, cropped, and unskewed image.

ctross/DieTryin documentation built on Sept. 8, 2024, 8:07 p.m.