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Type: Posts; User: ssyybbyy

1. ## Thread: Finding euler angles from axis-angle representation

by ssyybbyy
Replies
1
Views
1,404

### Finding euler angles from axis-angle representation

I have axis angle representation as follows: (ax, by, cz, theta). Now what are the corresponding euler angles?
2. ## Thread: A simple question on matrix in opengl and opencv

by ssyybbyy
Replies
2
Views
3,853

### Actually, the matrix is not a translation matrix,...

Actually, the matrix is not a translation matrix, it is a rotation matrix. Apart from row-major and column-major order, is there any other difference due to the coordinate system? Please let me know.
3. ## Thread: A simple question on matrix in opengl and opencv

by ssyybbyy
Replies
2
Views
3,853

### A simple question on matrix in opengl and opencv

I have some code which has matrix in opencv. Now I would like to use opengl for further modeling. Suppose I have the following matrix:

double mat[16] = { 1.0, 0.0, -a, 0.0, 0.0, 1.0, -b, 0.0, 0.0,...

by ssyybbyy
Replies
0
Views
1,000

### Need some suggestions about transforming a projected image

1283

Hi all, I need some suggestions about getting back the original object from the projected object. In the attached figure, AB is the projected object onto the XY plane. I need to get back the...

by ssyybbyy
Replies
0
Views
759

1263

Hello every body, I have a plane and attached figure shows two positions of the plane, (a) no rotation and (b) with rotation where rotation axis is defined by ax + by + cz.

Now, the plane...
6. ## Thread: Displaying an image as its mirror image

by ssyybbyy
Replies
1
Views
1,049

### Displaying an image as its mirror image

Suppose when we display image, we paste the image along the texture coordinates i.e. 00, 01, 11, 10. Now how to map the texture so that image is displayed as mirror image in a plane.
Thanks in...
7. ## Thread: OpenGL and OpenCV matrix

by ssyybbyy
Replies
0
Views
1,344

### OpenGL and OpenCV matrix

Hello, I am working on rotation matrix in OpenCV. I need to use it for OpenGL. Do I need to transpose the matrix in OpenCV in order to use for OpenGL? Does this matter for rotation matrix. Please...
8. ## Thread: Extracting only z rotation matrix from a rotation matrix

by ssyybbyy
Replies
1
Views
1,319

### Extracting only z rotation matrix from a rotation matrix

Hello,
I have a 3X3 rotation matrix. I have small 3D model. I only need to consider z rotation for that model, I don't need to consider xy movement or rotation. How can I extract the matrix...
9. ## Thread: Some suggestion about conversion from pixel coordinate to window (object) coordinate

by ssyybbyy
Replies
0
Views
1,260

### Some suggestion about conversion from pixel coordinate to window (object) coordinate

Hello everybody,
I have extracted some points using OpenCV from video. The imager esolution is ( 640X 480). The extracted coordinates are in pixel coordinates i.e. it looks like follows:
...
10. ## Thread: Displaying video from OpenCV to OpenGL

by ssyybbyy
Replies
1
Views
2,704

### Displaying video from OpenCV to OpenGL

Hello, I have a program written in OpenCV which captures video from webcam and displays it. I would need to use some functionalities of OpenGL because after image processing, I need to do some 3D...
11. ## Thread: How to smoothly connect a number of points

by ssyybbyy
Replies
1
Views
1,562

### How to smoothly connect a number of points

https://www.dropbox.com/s/8oe7j83ou2enqd4/points.png

Hello every body,

I have uploaded a picture of a number of points to the following link:

Hello every body,

...
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