OpenCV (Open Source Computer Vision) is a cross-platform library of programming functions for real time computer vision. It was officially launched by Intel in 1999 and is now supported by Willow Garage. Uses include: Human-Computer Interaction; Object Identification, Segmentation and ...
0
votes
0answers
9 views
Writing a text in a QPixmap
I'm having what is follow:
QLabel* label_PM= new QLabel(this);
QPixmap PM ("C:/PM.jpg");
label_PM->setPixmap(PM);
I would like to insert to the PM a text like what is done in OpenCV cv::putText.
...
0
votes
0answers
10 views
Opencv Datatype definition
Hello I wannted to access my pixels in opencv 2 in some smart way. for that I defined the following pixel structure:
struct mypixels
{
unsigned char red;
unsigned char green;
unsigned ...
0
votes
0answers
6 views
Delete a saved Image in Python on Raspberry Pi with OpenCV
I'm programming a Lego sorter machine. I using the following hardware: Raspberry Pi and a Piface I/O module. On the Raspberry runs OpenCV 2.4.1 and the script is written in Python.
The following ...
-1
votes
0answers
20 views
chroma keying using mahalanobis
the following is my code, but it seems to cause an unhandled exception error at the line calccovarmatrix line i don't know why.
int main()
{
//create matrix to store image
Mat image;
Mat ...
0
votes
0answers
7 views
OpenCV: Rotate camera around its center
i have a very basically question about rotation. I have a 3x4 extrinsic camera matrix containing the 3x3 rotation matrix and a 3x1 translation vector.
I m able rotate the camera around the world ...
1
vote
1answer
12 views
How should I prepare positive images for HAAR training for hand detection?
I am using this dataset: http://www.robots.ox.ac.uk/~vgg/data/hands/
However, I am only going to use hands which are > 4200 sq pixels in area, which leaves me with just 621 hands. I realised that ...
2
votes
1answer
25 views
cv::Erode error with binary cv::mat
So I'm trying to erode a binary matrix.
I create the matrix using this code:
cv::Mat tmp = cv::Mat::zeros( IMG->width, IMG->height, CV_8U );
for( auto i = 0 ; i < IMG->width ; i++)
{
...
1
vote
1answer
10 views
I'm using stitcher class to create a panorama from multiple images. How to reduce calculation time?
Is there a possibility to reduce calculation time when stitching more than two images with opencv stitcher class? I noticed that it grows rather exponentially the more images I want to stitch (why?). ...
-3
votes
0answers
13 views
how to handle open source code. eclipse and openCV additional [closed]
I am desperate to have some guidelines, please. Newbie HC!
I have downloaded this
http://opensource.samsung.com/reception/receptionSub.do?method=search&searchValue=EK-GC100
what do I have to ...
0
votes
1answer
16 views
Feature point Tracking
I am trying to track set of feature points in a sequence of grayscale images using OpenCV 2.4.0.
I already know how to implement SIFT or SURF for detecting feature points and initially computing the ...
0
votes
1answer
19 views
Finding camera and distortion matrix usinc cvCalibrateCamera2( )
I was trying to find out the camera matrix and distortion coefficients using cvCalibrateCamera2. There were no compilation errors, but when I am trying to execute the program it gives:
OpenCV ...
0
votes
1answer
17 views
(RESOLVED) HOGDescriptor Error and Assertion Failed
I've just added HOG Descriptor to my object detection code to tracking the pedestrian. Here we go my code:
#include"stdafx.h"
#include<vector>
#include<iostream>
...
0
votes
0answers
17 views
goodFeaturesToTrack OpenCV 2.4 Extremely Slow compared to Opencv1
I have this really strange issue and I think I might be doing something wrong, but I have an opencv1 implementation for Pyramidal Lucas Kanade and an opencv2 implementation. The difference is that the ...
0
votes
1answer
22 views
How to insert a line or rectangle in the Mat object (openCV)
My class implements CVCameraListener interface which has a method onCameraFrame() which returns Mat object which will be shown on phone's screen.(this method returns what you see on the screen of ...
0
votes
0answers
17 views
Release VideoWriter in Python OpenCV
Does anybody know what the command to release a VideoWriter object in python is?
In my code I import the following:
import cv2
import cv2.cv as cv
The documentation I can find does not say how to ...
Community Bulletin
Related Tags
c++ × 3511image-processing × 1682
python × 950
computer-vision × 926
android × 764c × 740
image × 416
java × 379
c# × 293
ios × 291
visual-studio-2010 × 288
visual-c++ × 282
qt × 254
emgucv × 236
javacv × 231
iphone × 190
video × 186
matlab × 171
matrix × 163
xcode × 156
osx × 155
camera × 151
webcam × 148
linux × 143
cmake × 140
