wat i did is advisable . ?

I am from you here to start learning OpenCvSharp. It’s very helpful for me .But . I Still Don’t know how to use SURF.
Could you write a SURF article ? Thank you very much!~

“OpenCV Error: Sizes of input arguments do not match (image and template should h
ave the same type) in unknown function, file ..\..\..\..\ocv\opencv\src\cv\cvtem
plmatch.cpp, line 356″

tpl_width = tpl->width;
tpl_height = tpl->height;

[pls note that cvShowImage in the above code works..]

after while loop :
frame = cvQueryFrame( capture );
cvFlip(frame,frame,1);
// Convert the image into an HSV image
imgHSV = cvCreateImage(cvGetSize(frame), 8, 3);
cvCvtColor(frame, imgHSV, CV_BGR2HSV);

img = cvCreateImage(cvGetSize(frame), 8, 1);
cvInRangeS(imgHSV,cvScalar(h1,s1,v1),cvScalar(h2,s2,v2),img);
cvShowImage( “Threshold”,img);//works
tpl = cvLoadImage( “c://b.png”, CV_LOAD_IMAGE_COLOR );

/* get image’s properties */
img_width = img->width;
img_height = img->height;
tpl_width = tpl->width;
tpl_height = tpl->height;
res_width = img_width – tpl_width + 1;
res_height = img_height – tpl_height + 1;

res = cvCreateImage( cvSize( res_width, res_height ), IPL_DEPTH_32F, 1 );

cvMatchTemplate(img, tpl, res, CV_TM_SQDIFF ); ”

When i try the same with frame instead of img , the program runs but now an exception is thrown..

after while loop :
frame = cvQueryFrame( capture );
cvFlip(frame,frame,1);
// Convert the image into an HSV image
imgHSV = cvCreateImage(cvGetSize(frame), 8, 3);
cvCvtColor(frame, imgHSV, CV_BGR2HSV);

img = cvCreateImage(cvGetSize(frame), 8, 1);
tpl = cvLoadImage( “c://b.png”, CV_LOAD_IMAGE_COLOR );

/* get image’s properties */
img_width = img->width;
img_height = img->height;
tpl_width = tpl->width;
tpl_height = tpl->height;
res_width = img_width – tpl_width + 1;
res_height = img_height – tpl_height + 1;

res = cvCreateImage( cvSize( res_width, res_height ), IPL_DEPTH_32F, 1 );

cvMatchTemplate(img, tpl, res, CV_TM_SQDIFF ); ”

When i try the same with frame instead of img , the program runs but now an exception is thrown..

CvCapture* cap ...;
IplImage* img ...;
IplImage* tpl = cvLoadImage ...;
IplImage* res ...;

img = cvQueryFrame(cap);
res = cvCreateImage ...


You’ll notice that I also instantiated the template outside of the loop since it only needs to get built once.

CvCapture cap = CvCapture.FromCamera(1);
IplImage img = cap.QueryFrame();

C++ should look something like this:

CvCapture* cap = CvCapture.fromCamera(1);
IplImage* img = cvQueryFrame(cap);

while this doesn’t..

” IplImage* img = cvCreateImage(cvGetSize(frame), 8, 1);
IplImage* tpl = cvLoadImage( “c://b.png”, CV_LOAD_IMAGE_COLOR );
IplImage* res = cvCreateImage( cvSize( res_width, res_height ), IPL_DEPTH_32F, 1 );
cvMatchTemplate(img, tpl, res, CV_TM_SQDIFF ); ”

Not necessary for me to mind the const in
“void cvMatchTemplate(const CvArr* image, const CvArr* templ, CvArr* result, int method)” ??