cv_image_sharp.cpp revision be3ac1e217dd371c77983c812dfb149c258a3f42 
1/*
2 * cv_image_sharp.cpp - image sharp
3 *
4 *  Copyright (c) 2016-2017 Intel Corporation
5 *
6 * Licensed under the Apache License, Version 2.0 (the "License");
7 * you may not use this file except in compliance with the License.
8 * You may obtain a copy of the License at
9 *
10 *   http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 *
18 * Author: Andrey Parfenov <a1994ndrey@gmail.com>
19 * Author: Wind Yuan <feng.yuan@intel.com>
20 */
21
22#include "cv_image_sharp.h"
23
24namespace XCam {
25
26
27CVImageSharp::CVImageSharp ()
28    : CVBaseClass ()
29{
30
31}
32
33cv::Mat
34CVImageSharp::sharp_image_gray (const cv::Mat &image, float sigmar)
35{
36    cv::Mat temp_image;
37    image.convertTo (temp_image, CV_32FC1);
38    cv::Mat bilateral_image;
39    cv::bilateralFilter (temp_image, bilateral_image, 5, sigmar, 2);
40
41    cv::Mat sharp_filter = (cv::Mat_<float>(3, 3) << -1, -1, -1, -1, 8, -1, -1, -1, -1);
42    cv::Mat filtered_image;
43    cv::filter2D (bilateral_image, filtered_image, -1, sharp_filter);
44    cv::normalize (filtered_image, filtered_image, 0, 255.0f, cv::NORM_MINMAX);
45    cv::Mat sharpened = temp_image + filtered_image;
46    cv::normalize (sharpened, sharpened, 0, 255.0f, cv::NORM_MINMAX);
47    return sharpened.clone ();
48}
49
50float
51CVImageSharp::measure_sharp (const cv::Mat &image)
52{
53    cv::Mat dst;
54    cv::Laplacian (image, dst, -1, 3, 1, 0, cv::BORDER_CONSTANT);
55    dst.convertTo (dst, CV_8UC1);
56    float sum = cv::sum (dst)[0];
57    sum /= (image.rows * image.cols);
58    return sum;
59}
60
61}
62