genetica87 | 5 Jul 22:44 2012
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Unexplained undefined error

Good day

I am using OpenCV2.2 with Codeblocks 10. My Opencv is working I can compile using various functions except
when declaring cv::Mat then I receive "mat.hpp 189:  Undefined reference to cv::Mat::copyTo(cv::Mat&)
const" and various other.

Can someone please help me?

Regards

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Marco Romagnoli | 5 Jul 17:53 2012
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How to test a .xml classifier made with opencv_traincascade.exe



Hi:
  I made a pedestrian classifier with opencv_traincascade.exe and now I need to test it. I saved in the new format (without the parameter -baseFormatSave) so I cannot utilize opencv_performance.exe. What is there to replace opencv_performance.exe to test an xml created with opencv_traincascade.exe?
  Indeed,  I did save another instance of my classifier with  opencv_traincascade.exe with  -baseFormatSave BUT didn't work with opencv_performance.exe anyway. So again I ask what to do to test an xml classifier made with opencv_traincascade.exe.
  
Regards.
Marco Romagnoli


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Gabriela B | 5 Jul 16:52 2012
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OpenCV .so dependencies? I need a integrated jar

Hi! I'm trying to develop an application (JavaCV - JAR) that runs without the user has previously installed
OpenCV. I did it attaching all the .so of OpenCV in the JAR, unpacking in runtime and then loading it with
System.load(). It works fine.

Now, I can run the application if the user has installed all OpenCV dependencies, but if not the app crashes.
So my new challenge is attaching these dependencies. 

For example, highgui needs libavcodec-dev but if I attach libavcodec.so It can't be loaded, it throws an
UnsatisfiedLinkError with no information about the error. So, what I have to load before??

Thanks for your help.
Gaby

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paulal7489 | 5 Jul 15:06 2012

IMPORTANT: Need some advice in matchTemplate

Hello everybody,

I am using matchTemplate with a high number of templates, but just two templates are always shown.
So my idea was: Aplly the function matchTemplate for all templates and afterwords use some conditions
(loops!?) to get an output which templates were found. 

Something like that:

matchTemplate(src, templ6, result6, CV_TM_CCORR_NORMED);

if( ... templ6)
	{
		fprintf( stderr, "Value = 6" );
	}

I need to know, which templates was matched, because the templates are different values. When I know which
one matched, I know the value, that is shown.

Thanks a lot for help!!!

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Naresh Reddy Sankapelly | 5 Jul 23:27 2012
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RTSP Client with OpenCV + FFMPEG



Hey everyone,

I'm using opencv with ffmpeg to get frames from an RTSP stream(i.e. Coming from a network camera). I'm able to see the frames but with some issues. cv::VideoCapture::open() function gives too many errors in the console. Error looks like the following
[mpeg4 <at> 00918480] RTP: PT=60: bad cseq 079a expected=0fc7
[NULL <at> 0091a680] RTP: PT=61: bad cseq 6df1 expected=701a
[mpeg4 <at> 00918480] RTP: PT=60: bad cseq 079c expected=0fc9
[NULL <at> 0091a680] RTP: PT=61: bad cseq 6df3 expected=701c
[mpeg4 <at> 00918480] RTP: PT=60: bad cseq 079e expected=0fcb
[NULL <at> 0091a680] RTP: PT=61: bad cseq 6df5 expected=701e
[mpeg4 <at> 00918480] RTP: PT=60: bad cseq 07a0 expected=0fcd
[NULL <at> 0091a680] RTP: PT=61: bad cseq 6df7 expected=7020
[mpeg4 <at> 00918480] RTP: PT=60: bad cseq 07a2 expected=0fcf
[mpeg4 <at> 00918480] RTP: PT=60: bad cseq 07a4 expected=0fd1
[NULL <at> 0091a680] RTP: PT=61: bad cseq 6df9 expected=7022
[mpeg4 <at> 00918480] RTP: PT=60: bad cseq 07a6 expected=0fd3
[NULL <at> 0091a680] RTP: PT=61: bad cseq 6dfb expected=7024
[mpeg4 <at> 00918480] RTP: PT=60: bad cseq 07a8 expected=0fd5
[NULL <at> 0091a680] RTP: PT=61: bad cseq 6dfd expected=7026

Has anyone encountered similar problem in the past? What could be the reason for this? How do we disable ffmpeg logs from OpenCV program?

Thanks


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Kabinad Teshager | 5 Jul 14:07 2012
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objectmaker program

hello,
can anybody tell me pls where i can find objectmaker program that we use to create description file for
positive image in training cascade classifier?

thanks.

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skarthik_rajan | 5 Jul 13:17 2012
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GLCM

hi frens,
I am doing my mtech project now.
I want to know how to calculate GLCM in opencv.
My work is calculating the glcm features for images and using it to compare it with other images.can anyone
help me?
Thanks,
S.karthik

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elvis_the_king_is_alive | 5 Jul 12:49 2012
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Problems with Flann index and AutotunedIndexParams

Hey there,

I think I found a problem in AutotunedIndexParams for Flann index. If i use 4 Images and
AutotunedIndexParams chooses KDTree (i guess) there is a missing parameter algorithm. 

Example code is:

################
#include <iostream>

#include <opencv2/core/core.hpp>
#include <opencv2/features2d/features2d.hpp>
#include <opencv2/highgui/highgui.hpp>
#include <opencv2/nonfree/nonfree.hpp>
#include <opencv2/objdetect/objdetect.hpp>
#include <opencv2/flann/flann.hpp>

using namespace cv;
using namespace std; 
using namespace flann; 

int main( int argc, char** argv ) {
	string pathToImages = "/Users/me/Desktop/KeypointTest/images/";
	
	string img_1 = "book_001_canon.jpg";
	string img_2 = "book_002_canon.jpg";
	string img_3 = "book_003_canon.jpg";
	string img_4 = "book_004_canon.jpg";
	
	Mat db_image_1 = imread(pathToImages + img_1, CV_LOAD_IMAGE_COLOR);
	Mat db_image_2 = imread(pathToImages + img_2, CV_LOAD_IMAGE_COLOR);
	Mat db_image_3 = imread(pathToImages + img_3, CV_LOAD_IMAGE_COLOR);
	Mat db_image_4 = imread(pathToImages + img_4, CV_LOAD_IMAGE_COLOR);
	
	vector<KeyPoint> db_keypoints_1;	
	vector<KeyPoint> db_keypoints_2;	
	vector<KeyPoint> db_keypoints_3;	
	vector<KeyPoint> db_keypoints_4;
	
	Mat db_descriptors_1;
	Mat db_descriptors_2;
	Mat db_descriptors_3;
	Mat db_descriptors_4;
	
	Mat db_descriptor;
	
	SurfFeatureDetector detector(400, 4, 2, true, true);
	SurfDescriptorExtractor extractor;
	
	detector.detect(db_image_1, db_keypoints_1);
	detector.detect(db_image_2, db_keypoints_2);
	detector.detect(db_image_3, db_keypoints_3);
	detector.detect(db_image_4, db_keypoints_4);
	
	extractor.compute(db_image_1, db_keypoints_1, db_descriptors_1);
	extractor.compute(db_image_2, db_keypoints_2, db_descriptors_2);
	extractor.compute(db_image_3, db_keypoints_3, db_descriptors_3);
	extractor.compute(db_image_4, db_keypoints_4, db_descriptors_4);
	
	db_descriptor.push_back(db_descriptors_1);
	db_descriptor.push_back(db_descriptors_2);
	db_descriptor.push_back(db_descriptors_3);
	db_descriptor.push_back(db_descriptors_4);	
	
	IndexParams indexParams = *new AutotunedIndexParams();
	
	Index flannIndex = *new Index(db_descriptor, indexParams);
	
	return 0;
}
################

Images can be found at:

http://imgur.com/a/l3lfg

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Prakhar | 5 Jul 11:19 2012
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Face Detection



I am completely new to OpenCV.  Can someone help me with face detection using OpenCV 2.3.0?  I can get the live feed from the camera but don't know what to do next.
Thanks
Prakhar


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carlosalbertodiaz2000 | 4 Jul 19:49 2012
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OpenCV and autogain (how to disable)

Hello 

I would like to know if there is a simple and cheap way to achieve this. I require to be able to control the gain
in a webcam using OpenCV.

Usually gain in automatic (autogain) is set on in standard cheap web cameras (and analog video cameras
too). For my project I need to control by software the gain/ exposure and any other property available in
the camera. I am using OpenCV.

I would like: a recommendation for a cheap/flexible web usb camera that can be controlled with OpenCV.

Regards

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Carlos Diaz | 4 Jul 19:29 2012
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disable autogain and set a fixed gain



Hello 

I would like to know if there is a simple and cheap way to achieve this. I require to be able to control the gain in a webcam using OpenCV.

Usually gain in automatic (autogain) is set on in standard cheap web cameras (and analog video cameras too). For my project I need to control by software the gain/ exposure and any other property available in the camera. I am using OpenCV.

I would like: a recommendation for a cheap/flexible web usb camera that can be controlled with OpenCV.

Regards



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Gmane