minok's profile - activity

Sorry, maybe I was not precise enough. I need to find the exact center of gravity as you called it, an approximation is

Sorry, maybe I was not precise enough. I need to find the exact center of gravity as you called it, an approximation is

Find the center of mass of cells and crop the image I am trying to make a program to analyze cell nucleus, but in order

Hi I would like to copy encoded image as .png to char* buffer. What I am trying is:

CvMat* mat = cvEncodeImage(".png", img, param);
int bufLen = buffer->step;
unsigned char * pData = buffer->data.ptr;
char* buf;
memcpy( buf, pData, bufLen);

However buffer seems to be empty... I am not sure if I am accessing the data the right way, but I am having a hard time finding a proper documentation for this. Also - this has to be done in raw C (it's part of a bigger project).

Has anyone tried to do something like this before?

Cheers

Hey, I guess you probably won't visit this topic after 3 months, but I will still give it a shot. By any chance, have you solved this problem yet? I'm currently at the same state, I can't move on with 3D reconstruction because objects on the new images are somehow resized. Cheers.

Hi guys,

I'm looking for the proper function that I can use to rectify my points, and either I cannot understand the documentation or perhaps there is no such function that I'm looking for. I will try to shortly describe you my program. The goal is to find X, Y and Z coordinates of little green balls that I'm taking the photos of. In order to do so, I use two cameras. First I made 15 chessboard photos to perform camera calibration. I do it for each camera using calibrateCamera() function. Then I undistort images with green balls using undistort(). Once that is done, I find the x and y coordinates of the green balls position on the image (coordinates in pixels). What I want to do next is to rectify those points to get canonical geometry. I'd like to rectify just points, not the whole images. As far as I know, what I need is essential and fundamental matrix. I get them by using the stereoCalibrate() function, where I pass my chessboard corners that I've already found before. So here I'm at the point that I have my 2d coordinates from both camera images, and I also have essential and fundamental matrix. And absolutely no idea what to do next to rectify those points. I use http://docs.opencv.org/2.4/modules/ca... this documentation. Not everything is clear there for me, but I can't see anything close to rectifypoints there.

Thanks!