[−][src]Function imageproc::integral_image::integral_squared_image
pub fn integral_squared_image<P, T>(image: &Image<P>) -> Image<ChannelMap<P, T>> where
P: Pixel<Subpixel = u8> + WithChannel<T> + 'static,
T: From<u8> + Primitive + AddAssign + 'static,
Computes the 2d running sum of the squares of the intensities in an image. Channels are summed independently.
See the integral_image
documentation for more information on integral images.
Examples
use imageproc::integral_image::{integral_squared_image, sum_image_pixels}; let image = gray_image!( 1, 2, 3; 4, 5, 6); let integral = gray_image!(type: u32, 0, 0, 0, 0; 0, 1, 5, 14; 0, 17, 46, 91); assert_pixels_eq!(integral_squared_image::<_, u32>(&image), integral); // Compute the sum of the squares of all pixels in the right two columns assert_eq!(sum_image_pixels(&integral, 1, 0, 2, 1)[0], 4 + 9 + 25 + 36); // Compute the sum of the squares of all pixels in the top row assert_eq!(sum_image_pixels(&integral, 0, 0, 2, 0)[0], 1 + 4 + 9);