vendor: OpenCV 5.0.0 snapshot at 755e50675d97db9b7d449d8bd6b09888646f6c6e

2026-08-22 00:11:13 +08:00
commit 12022378a3
3872 changed files with 2513409 additions and 0 deletions
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+#include "opencv2/core.hpp"
+#include "opencv2/imgcodecs.hpp"
+#include "opencv2/highgui.hpp"
+#include "opencv2/intensity_transform.hpp"
+
+#include <iostream>
+
+using namespace std;
+using namespace cv;
+using namespace cv::intensity_transform;
+
+namespace
+{
+static std::string keys =
+    "{ help  h     | | Print help message. }"
+    "{ input i     | | Path to the input image. }";
+
+// global variables
+Mat g_image;
+
+int g_gamma = 40;
+const int g_gammaMax = 500;
+Mat g_imgGamma;
+const std::string g_gammaWinName = "Gamma Correction";
+
+Mat g_contrastStretch;
+int g_r1 = 70;
+int g_s1 = 15;
+int g_r2 = 120;
+int g_s2 = 240;
+const std::string g_contrastWinName = "Contrast Stretching";
+
+Mat g_imgBIMEF;
+int g_mu = 50;
+const int g_muMax = 100;
+const std::string g_BIMEFWinName = "BIMEF";
+
+static void onTrackbarGamma(int, void*)
+{
+    float gamma = g_gamma / 100.0f;
+    gammaCorrection(g_image, g_imgGamma, gamma);
+    imshow(g_gammaWinName, g_imgGamma);
+}
+
+static void onTrackbarContrastR1(int, void*)
+{
+    contrastStretching(g_image, g_contrastStretch, g_r1, g_s1, g_r2, g_s2);
+    imshow("Contrast Stretching", g_contrastStretch);
+}
+
+static void onTrackbarContrastS1(int, void*)
+{
+    contrastStretching(g_image, g_contrastStretch, g_r1, g_s1, g_r2, g_s2);
+    imshow("Contrast Stretching", g_contrastStretch);
+}
+
+static void onTrackbarContrastR2(int, void*)
+{
+    contrastStretching(g_image, g_contrastStretch, g_r1, g_s1, g_r2, g_s2);
+    imshow("Contrast Stretching", g_contrastStretch);
+}
+
+static void onTrackbarContrastS2(int, void*)
+{
+    contrastStretching(g_image, g_contrastStretch, g_r1, g_s1, g_r2, g_s2);
+    imshow("Contrast Stretching", g_contrastStretch);
+}
+
+static void onTrackbarBIMEF(int, void*)
+{
+    float mu = g_mu / 100.0f;
+    BIMEF(g_image, g_imgBIMEF, mu);
+    imshow(g_BIMEFWinName, g_imgBIMEF);
+}
+}
+
+int main(int argc, char **argv)
+{
+    CommandLineParser parser(argc, argv, keys);
+
+    const std::string inputFilename = parser.get<String>("input");
+    parser.about("Use this script to apply intensity transformation on an input image.");
+    if (parser.has("help") || inputFilename.empty())
+    {
+        parser.printMessage();
+        return 0;
+    }
+
+    // Read input image
+    g_image = imread(inputFilename);
+
+    // Create trackbars
+    namedWindow(g_gammaWinName);
+    createTrackbar("Gamma value", g_gammaWinName, &g_gamma, g_gammaMax, onTrackbarGamma);
+
+    namedWindow(g_contrastWinName);
+    createTrackbar("Contrast R1", g_contrastWinName, &g_r1, 256, onTrackbarContrastR1);
+    createTrackbar("Contrast S1", g_contrastWinName, &g_s1, 256, onTrackbarContrastS1);
+    createTrackbar("Contrast R2", g_contrastWinName, &g_r2, 256, onTrackbarContrastR2);
+    createTrackbar("Contrast S2", g_contrastWinName, &g_s2, 256, onTrackbarContrastS2);
+
+    namedWindow(g_BIMEFWinName);
+    createTrackbar("Enhancement ratio mu", g_BIMEFWinName, &g_mu, g_muMax, onTrackbarBIMEF);
+
+    // Apply intensity transformations
+    Mat imgAutoscaled, imgLog;
+    autoscaling(g_image, imgAutoscaled);
+    gammaCorrection(g_image, g_imgGamma, g_gamma/100.0f);
+    logTransform(g_image, imgLog);
+    contrastStretching(g_image, g_contrastStretch, g_r1, g_s1, g_r2, g_s2);
+    BIMEF(g_image, g_imgBIMEF, g_mu / 100.0f);
+
+    // Display intensity transformation results
+    imshow("Original Image", g_image);
+    imshow("Autoscale", imgAutoscaled);
+    imshow(g_gammaWinName, g_imgGamma);
+    imshow("Log Transformation", imgLog);
+    imshow(g_contrastWinName, g_contrastStretch);
+    imshow(g_BIMEFWinName, g_imgBIMEF);
+
+    waitKey(0);
+    return 0;
+}