img_pad: Pad an image

In srvanderplas/ShoeScrubR: Functions for cleaning data from CSAFE's Longitudinal Shoe Study

Description

Pad an image

Usage

img_pad(img, padding = c(0, 0, 0, 0), value = 0, top = padding[1],
  bottom = padding[2], left = padding[3], right = padding[4])

Arguments

img	image
padding	vector of four padding values (top, bottom, left, right). Specifying any one of the individual values will override the vector specification.
value	fill value to use for padding the image. If value has the same length as the number of frames in the image, it will be applied frame-wise.
top	number of pixels to add to the top
bottom	number of pixels to add to the bottom
left	number of pixels to add to the left
right	number of pixels to add to the right

Examples

par(mfrow = c(1, 2))
im <- EBImage::readImage(system.file('images', 'nuclei.tif', package='EBImage'))[,,1:3]
EBImage::colorMode(im) <- "Color"
dim(im)
plot(im)

im_pad <- img_pad(im, value = c(0, 1, 0), top = 15, bottom = 10, left = 5, right = 0)
dim(im_pad)
plot(im_pad)
im_pad <- img_pad(im, value = c(0, 1, 0), padding = c(15, 10, 5, 0))
dim(im_pad)
plot(im_pad)

srvanderplas/ShoeScrubR documentation built on Nov. 27, 2019, 2:09 p.m.