image-js/lib/featureMatching/visualize/scaleKeypoints.js

Image processing and manipulation in JavaScript

/**
 * Scales the coordinates of the keypoints.
 * @param keypoints - Keypoints to scale.
 * @param scale - Scalar by which to multiply the coordinates.
 * @returns Scaled keypoints (copy of the original array).
 */
export function scaleKeypoints(keypoints, scale) {
    if (scale === 1)
        return keypoints.slice();
    return keypoints.map((kpt) => {
        return {
            origin: {
                row: kpt.origin.row * scale,
                column: kpt.origin.column * scale,
            },
            score: kpt.score,
        };
    });
}
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