getBounds: Compares Two Tif Images To Find Where They Differ

In sendplot: Tool for sending interactive plots with tool-tip content.

Description

NOT CALLED BY USER. The getBounds function is utilized by the automapPts function to compare two tif images for differences

Usage

getBounds(channelClr,
          tif.fin,
          tif.dot,
          automap.method="mode")

Arguments

channelClr	Which color channel to compare: "red", "blue", "green"
tif.fin	Path file name to tif image of plots without additional bounding point
tif.dot	Path file name to tif image with the given figure's additional bounding points displayed
automap.method	Method to detect upper and lower bounds. Current options are "mode" or "median"

Details

This function is used by the automapPts function to retrieve up.left and low.right pixil coordinates of a figure. getBounds will check a certain channel (red, green, or blue) of two rtiff/pixmap pixmapRGB objects. It creates a logical matrix 0 if equal and 1 if different. This matrix gets passed into the mapMethod function to determine location.

Value

A list with up.left and low.right bounding coordinates in pixils or NA if could not map correctly

Note

NOT CALLED BY USER. INTERNAL HELPER FUNCTION

Author(s)

Lori A.Shepherd, Daniel P. Gaile

See Also

makeImap, rtiff, pixmap, automapPts, mapMethod

Examples

# not called by user

sendplot documentation built on May 2, 2019, 3:30 p.m.