uk.ac.horizon.aestheticodes.controllers.MatTranform.java Source code

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Here is the source code for uk.ac.horizon.aestheticodes.controllers.MatTranform.java

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/*
 * Aestheticodes recognises a different marker scheme that allows the
 * creation of aesthetically pleasing, even beautiful, codes.
 * Copyright (C) 2015  Aestheticodes
 *
 *     This program is free software: you can redistribute it and/or modify
 *     it under the terms of the GNU Affero General Public License as published
 *     by the Free Software Foundation, either version 3 of the License, or
 *     (at your option) any later version.
 *
 *     This program is distributed in the hope that it will be useful,
 *     but WITHOUT ANY WARRANTY; without even the implied warranty of
 *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *     GNU Affero General Public License for more details.
 *
 *     You should have received a copy of the GNU Affero General Public License
 *     along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package uk.ac.horizon.aestheticodes.controllers;

import org.opencv.core.Core;
import org.opencv.core.Mat;

class MatTranform {
    static Mat crop(Mat imgMat) {
        final int size = Math.min(imgMat.rows(), imgMat.cols());

        final int colStart = (imgMat.cols() - size) / 2;
        final int rowStart = (imgMat.rows() - size) / 2;

        return imgMat.submat(rowStart, rowStart + size, colStart, colStart + size);
    }

    static void rotate(Mat src, Mat dst, int angle, boolean flip) {
        if (src != dst) {
            src.copyTo(dst);
        }

        angle = ((angle / 90) % 4) * 90;

        //0 : flip vertical; 1 flip horizontal

        int flip_horizontal_or_vertical = angle > 0 ? 1 : 0;
        if (flip) {
            flip_horizontal_or_vertical = -1;
        }
        int number = Math.abs(angle / 90);

        for (int i = 0; i != number; ++i) {
            Core.transpose(dst, dst);
            Core.flip(dst, dst, flip_horizontal_or_vertical);
        }
    }
}