From c3e4a52fbe44ae5bf2f754e922a2e932e3d20a28 Mon Sep 17 00:00:00 2001
From: "marina.kolpakova" <marina.kolpakova@itseez.com>
Date: Wed, 14 Nov 2012 20:11:18 +0400
Subject: [PATCH] soft cascade sample

---
 modules/gpu/src/softcascade.cpp |   4 +-
 samples/gpu/softcascade.cpp     | 106 ++++++++++++++++++++++++++++++++++++++++
 2 files changed, 109 insertions(+), 1 deletion(-)
 create mode 100644 samples/gpu/softcascade.cpp

diff --git a/modules/gpu/src/softcascade.cpp b/modules/gpu/src/softcascade.cpp
index 0386542..7f5221f 100644
--- a/modules/gpu/src/softcascade.cpp
+++ b/modules/gpu/src/softcascade.cpp
@@ -287,7 +287,8 @@ struct cv::gpu::SCascade::Fields
 
     bool update(int fh, int fw, int shr)
     {
-        if (fh == luv.rows && fh == luv.cols) return false;
+        if ((fh == luv.rows) && (fw == luv.cols)) return false;
+
         plane.create(fh * (HOG_LUV_BINS + 1), fw, CV_8UC1);
         fplane.create(fh * HOG_BINS, fw, CV_32FC1);
         luv.create(fh, fw, CV_8UC3);
@@ -297,6 +298,7 @@ struct cv::gpu::SCascade::Fields
 
         hogluv.create((fh / shr) * HOG_LUV_BINS + 1, fw / shr + 1, CV_32SC1);
         hogluv.setTo(cv::Scalar::all(0));
+
         return true;
     }
 
diff --git a/samples/gpu/softcascade.cpp b/samples/gpu/softcascade.cpp
new file mode 100644
index 0000000..3c08fdb
--- /dev/null
+++ b/samples/gpu/softcascade.cpp
@@ -0,0 +1,106 @@
+#include <opencv2/gpu/gpu.hpp>
+#include <opencv2/highgui/highgui.hpp>
+#include <iostream>
+
+int main(int argc, char** argv)
+{
+    const std::string keys =
+        "{help h usage ?    |     | print this message }"
+        "{cascade c         |     | path to configuration xml }"
+        "{frames f          |     | path to configuration xml }"
+        "{min_scale         |0.4f | path to configuration xml }"
+        "{max_scale         |5.0f | path to configuration xml }"
+        "{total_scales      |55   | path to configuration xml }"
+        "{device d          |0    | path to configuration xml }"
+    ;
+
+    cv::CommandLineParser parser(argc, argv, keys);
+    parser.about("Soft cascade training application.");
+
+    if (parser.has("help"))
+    {
+        parser.printMessage();
+        return 0;
+    }
+
+    if (!parser.check())
+    {
+        parser.printErrors();
+        return 1;
+    }
+
+    cv::gpu::setDevice(parser.get<int>("device"));
+
+    std::string cascadePath = parser.get<std::string>("cascade");
+
+    cv::FileStorage fs(cascadePath, cv::FileStorage::READ);
+    if(!fs.isOpened())
+    {
+        std::cout << "Soft Cascade file " << cascadePath << " can't be opened." << std::endl << std::flush;
+        return 1;
+    }
+
+    std::cout << "Read cascade from file " << cascadePath << std::endl;
+
+    float minScale =  parser.get<float>("min_scale");
+    float maxScale =  parser.get<float>("max_scale");
+    int scales     =  parser.get<int>("total_scales");
+
+    using cv::gpu::SCascade;
+    SCascade cascade(minScale, maxScale, scales);
+
+    if (!cascade.load(fs.getFirstTopLevelNode()))
+    {
+        std::cout << "Soft Cascade can't be parsed." << std::endl << std::flush;
+        return 1;
+    }
+
+    std::string frames = parser.get<std::string>("frames");
+    cv::VideoCapture capture(frames);
+    if(!capture.isOpened())
+    {
+        std::cout << "Frame source " << frames << " can't be opened." << std::endl << std::flush;
+        return 1;
+    }
+
+    cv::gpu::GpuMat objects(1, sizeof(SCascade::Detection) * 10000, CV_8UC1);
+    cv::gpu::printShortCudaDeviceInfo(parser.get<int>("device"));
+    for (;;)
+    {
+        cv::Mat frame;
+        if (!capture.read(frame))
+        {
+            std::cout << "Nothing to read. " << std::endl << std::flush;
+            return 0;
+        }
+
+        cv::gpu::GpuMat dframe(frame), roi(frame.rows, frame.cols, CV_8UC1), trois;
+        roi.setTo(cv::Scalar::all(1));
+        cascade.genRoi(roi, trois);
+        cascade.detect(dframe, trois, objects);
+
+        cv::Mat dt(objects);
+        typedef cv::gpu::SCascade::Detection Detection;
+
+        Detection* dts = ((Detection*)dt.data) + 1;
+        int* count = dt.ptr<int>(0);
+
+        std::cout << *count << std::endl;
+
+        cv::Mat result;
+        frame.copyTo(result);
+
+
+        for (int i = 0; i < *count; ++i)
+        {
+            Detection d = dts[i];
+            cv::rectangle(result, cv::Rect(d.x, d.y, d.w, d.h), cv::Scalar(255, 0, 0, 255), 1);
+        }
+
+        std::cout << "working..." << std::endl;
+        cv::imshow("Soft Cascade demo", result);
+        cv::waitKey(10);
+    }
+
+    return 0;
+}
\ No newline at end of file
-- 
2.7.4