voluptasquisquam/src/util/kernels.js

Image processing and manipulation in JavaScript

export const DISCRETE_LAPLACE_4 = [
    [0,  1, 0],
    [1, -4, 1],
    [0,  1, 0]
];

export const DISCRETE_LAPLACE_8 = [
    [1,  1, 1],
    [1, -8, 1],
    [1,  1, 1]
];

export const GRADIENT_X = [
    [-1, 0, +1],
    [-2, 0, +2],
    [-1, 0, +1]
];

export const GRADIENT_Y = [
    [-1, -2, -1],
    [0,  0,  0],
    [+1, +2, +1]
];

export const SECOND_DERIVATIVE = [
    [-1, -2,  0,  2,  1],
    [-2, -4,  0,  4,  2],
    [0,  0,  0,  0,  0],
    [1,  2,  0, -2, -1],
    [2,  4,  0, -4, -2]
];

export const SECOND_DERIVATIVE_INV = [
    [1,  2,  0, -2, -1],
    [2,  4,  0, -4, -2],
    [0,  0,  0,  0,  0],
    [-2, -4,  0,  4,  2],
    [-1, -2,  0,  2,  1]
];