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Updated sample using new cmd parser

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This commit is contained in:
itsyplen 2011-08-10 11:29:32 +00:00
parent 49fb4ecbc1
commit 24279c2c11
1 changed files with 23 additions and 20 deletions
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43
samples/cpp/connected_components.cpp
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@ -8,19 +8,6 @@ using namespace std;
Mat img; Mat img;
int threshval = 100; int threshval = 100;
void help()
{
cout <<
"\n This program demonstrates connected components and use of the trackbar\n"
<< "\n"
<< "Usage: ./connected_components <image>\n"
<< "\n"
<< "The image is converted to grayscale and displayed, another image has a trackbar\n"
<< "that controls thresholding and thereby the extracted contours which are drawn in color\n"
<< endl;
}
void on_trackbar(int, void*) void on_trackbar(int, void*)
{ {
Mat bw = threshval < 128 ? (img < threshval) : (img > threshval); Mat bw = threshval < 128 ? (img < threshval) : (img > threshval);
@ -47,18 +34,34 @@ void on_trackbar(int, void*)
imshow( "Connected Components", dst ); imshow( "Connected Components", dst );
} }
int main( int argc, char** argv ) void help()
{ {
// the first command line parameter printf("\n This program demonstrates connected components and use of the trackbar\n"
if(argc != 2) "Usage: \n"
" ./connected_components <image(stuff.jpg as default)>\n"
"The image is converted to grayscale and displayed, another image has a trackbar\n"
"that controls thresholding and thereby the extracted contours which are drawn in color\n");
}
const char* keys =
{
"{1| |stuff.jpg|image for converting to a grayscale}"
};
int main( int argc, const char** argv )
{
help();
CommandLineParser parser(argc, argv, keys);
string inputImage = parser.get<string>("1");
img = imread(inputImage.c_str(), 0);
if(img.empty())
{ {
help(); printf("Could not read input image file: %s\n", inputImage.c_str());
return -1; return -1;
} }
if( !(img=imread(argc == 2 ? argv[1] : "stuff.jpg", 0)).data) //The ending 0 in imread converts the image to grayscale.
return -1;
namedWindow( "Image", 1 ); namedWindow( "Image", 1 );
imshow( "Image", img ); imshow( "Image", img );
namedWindow( "Connected Components", 1 ); namedWindow( "Connected Components", 1 );