Determine A Common Spatial Domain And Pixel Resolution
Determine a common spatial domain and pixel resolution for several spatial objects such as images, masks, windows and point patterns.
- Any number of pixel images (objects of class
"im"), binary masks (objects of class
"mask") or data which can be converted to binary masks by
This function determines a common spatial resolution and spatial domain for several spatial objects.
... may be pixel images,
binary masks, or other spatial objects acceptable to
The common pixel grid is determined by inspecting all the pixel images
and binary masks in the argument list, finding the pixel grid with the
highest spatial resolution, and extending this pixel grid to cover the
bounding box of all the spatial objects.
The return value is a binary mask
M, representing the bounding box
at the chosen pixel resolution.
as.im(X, W=M) to convert a pixel image
X to this new
as.mask(W, xy=M) to convert a window
to a binary mask at this new pixel resolution.
See the Examples.
- A binary mask (object of class
A <- setcov(square(1)) G <- density(runifpoint(42), dimyx=16) H <- commonGrid(A, letterR, G) newR <- as.mask(letterR, xy=H) newG <- as.im(G, W=H)