Plots grayscale or color images with proper axes.
Uses base graphics with useRaster=TRUE for speed. Images are displayed in
their natural orientation (as they appear in image viewers).
Usage
img_plot(img, col = gray.colors(256, start = 0, end = 1), main = NULL)
Arguments
- img
Matrix or array. Either:
Integer matrix (0-255) for grayscale from img_load()
Logical matrix for binary masks
Array (nrow, ncol, 3) for RGB color images
- col
Color palette for grayscale. Default gray scale. Use c("white", "black") for masks
- main
Character. Plot title. Default NULL
Value
Invisibly returns the image
Examples
if (FALSE) { # \dontrun{
# Plot grayscale image
img <- img_load("leaf.png")
img_plot(img)
# Plot binary mask
mask <- img_mask(img)
img_plot(mask, col = c("white", "black"), main = "Binary mask")
} # }
