lagarkane's profile - activity

@Tetragramm: could you rephrase that? Did you mean that I should get the mean value of my template image and substract i

@Tetragramm: could you rephrase that? Did you mean that I should get the mean value of my template image and substract i

Desperate as I am, I checked out 3.0.0, removed all the SSE and -O3 optimizations, compiled in debug with the strict min

IPP OFF ; OpenCL OFF -> same result.. :(

I don't have the issue on ubuntu 17.04 with opencv 3.0.0. Though, on Arch linux, with the same version (git checkout 3.0

I don't have the issue on ubuntu 17.04 with opencv 3.0.0. Though, on Arch linux, with the same version (git checkout 3.0

I have a colleague who told me he doesn't have this problem. I'll write down here his version of opencv, linux, and comp

Sorry for the pictures, they were uploaded on ImgBB. I rectified. As for the code, I didn't code anything here. My issue

Sorry for the pictures, they were uploaded on ImgBB. I rectified. As for the code, I didn't code anything here. My issue

OpenCV's matchTemplate tutorial code not giving expected results Hi! I've been having troubbles with OpenCV's matchTemp

OpenCV's matchTemplate tutorial code not giving expected results Hi! I've been having troubbles with OpenCV's matchTemp

OpenCV's matchTemplate tutorial code not giving expected results Hi! I've been having troubbles with OpenCV's matchTemp

Hi!

I am trying to retrieve an OpenGL camera's parameters and use them for image processing.

I have my 4x4 Modelview from which I extract the camera's position and orientation as such:

Matrix3 R = glModelview.to3x3()
R.rotate(1, 0, 0, M_PI) // flip z axis 
Vector3 camera_pos(glModelview[0][3], glModelview[1][3], glModelview[2][3]); // world position in camera's coordinates

I retrieve the focal length and principal point from the Projection matrix as follow:

glP = glProjectionMatrix;
double w = d_imageSize.x();
double h = d_imageSize.y();

double fx = 0.5 * w * glP[0][0];
double fy = 0.5 * h * (1.0 + glP[1][1]);
double cx = 0.5 * w * (1.0 - glP[0][3]);
double cy = 0.5 * h * (1.0 + glP[1][3]);

I now have my intrinsic and extrinsic parameters, and just compose the projection matrix. Though it seems that I am missing something, as depending on the size of my OpenGL window (viewport) I get different results. How could I integrate the viewport in my projection matrix?

Thanks in advance :)