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
24 namespace XCam {
25
26
CVImageSharp()27 CVImageSharp::CVImageSharp ()
28 : CVBaseClass ()
29 {
30
31 }
32
33 cv::Mat
sharp_image_gray(const cv::Mat & image,float sigmar)34 CVImageSharp::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
50 float
measure_sharp(const cv::Mat & image)51 CVImageSharp::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