mask.create {adimpro} | R Documentation |
Select part of image according to greyscale (or color) value.
mask.create(img, range1 = c(0, 1), range2 = c(0, 1), range3 = c(0, 1), locate = TRUE)
img |
Image object of class "adimpro", usually the result
returned from read.image , read.raw , or make.image . |
range1 |
Range of gray values or values in the
first color channel. mask is set to FALSE for all
pixel with values outside this range. Defaults to c(0,1) . |
range2 |
Range of values in the second color
channel. mask is set to FALSE for all pixel with
values outside this range. Defaults to c(0,1) . |
range3 |
Range of values in the third color
channel. mask is set to FALSE for all pixel with
values outside this range. Defaults to c(0,1) . |
locate |
(logical). If TRUE (default), the image is displayed and
two opposite corners of a rectangular region can be selected using the
mouse (call of locator(2) ). |
Function to create a mask. The returned object mask
can
be used to restrict computations in function awsimage
to
a region characterized by mask==TRUE
.
logical matrix of image dimension.
Joerg Polzehl polzehl@wias-berlin.de
Polzehl, J., and Tabelow, K. (2007). Adaptive smoothing of digital images, Journal of Statistical Software 19 (1).