qr_threshold_shortcut_: (Internal) Image thresholding, with some shortcuts

In brianwdavis/quadrangle: Wrangle QR Codes Out of Images

(Internal) Image thresholding, with some shortcuts

Description

This is an internal function used by qr_scan_js_from_corners and qr_scan_cpp. It's a wrapper around image_threshold which skips running the function call if the arguments indicate essentially unchanged images, such as pushing the blackest 0% of pixels to black, or the whitest 100% of pixels to white.

Usage

qr_threshold_shortcut_(mgk, type, threshold, ...)

Arguments

mgk	A magick image object.
type	Type of thresholding, either black or white.
threshold	Pixel intensity threshold.
...	Additional arguments passed through (channels).

brianwdavis/quadrangle documentation built on Feb. 27, 2023, 6:36 p.m.