I am new to opencv. I want to make a black image of user specified dimensions . I have found this
Mat atom_image = Mat::zeros( w, w, CV_8UC3 );
for Mat but i want to use IplImage * . Is there any method similar to the above for IplImage . Thanks for any help.
My first reaction would be to ask why you would use the old C-style interface? If there is no specific reason, then please use the C++ interface, using Mat objects, which has a way larger support for the moment.
As to your problem, use the following commands
IplImage* img;
cvSet(img, cvScalar(0,0,0));
Which could be used for setting every possible value. However it can be done even more easily:
IplImage* img;
cvZero(img);
Excuse me, to fast with copy paste. You should remove the second argument, since the function knows it needs to add a zero.
May you tell us why do you prefer old, deprecated C-style interface?
In the C API, you need to first define a pointer to memory with allocated space, by indeed using the cvCreateImage, which returns an IplImage pointer. Then you can use the provided functionality to add the values.
Asked: 2013-10-28 08:55:05 -0600
Seen: 3,826 times
Last updated: Oct 28 '13
