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I write my own gaussian filter but it is really slow. OpenCV's gaussian algorithm is much faster, 20 times than my gaussian filter. I want to rewrite opencv's gaussian algorithm in my project, and I don't want to include opencv in my project. However,...
Answer Snippets (Read the full thread at stackoverflow):
You could also do something very smart and work OpenCV is implementing convolution using a fast Fourier transform (FFT)..
OpenCV does make use of IPP when its available...
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I want to use OpenCV's image processing functions, but not the OpenCV GUI. I'm using OpenCV 2.0. I will use either Qt4 or WxWidgets for GUI functions. I compile with VC++ 2008 Express (VC++ 9.0).
I guess it breaks down to two or three questions:
Is it...
Started by Jive Dadson on
, 5 posts
by 4 people.
Answer Snippets (Read the full thread at stackoverflow):
Is it necessary....
I highly recommend wxWidgets for working with images.
If you don'tWell I don't know much about OpenCV, but I work with wxWidgets alot.
There is some source code examples that you can look at.
OpenCV integration with Qt .
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I need to rotate an image by very small angle, like 1-5 degrees. Does OpenCV provide simple way of doing that? From reading docs i can assume that getAffineTransform() should be involved, but there is no direct example of doing something like:
IplImage...
Answer Snippets (Read the full thread at stackoverflow):
If you use OpenCV 2.0 it is as easy as
using namespace cv; Mat rotateImage(const Mat& source, double angle) { Point2f src_center(source.cols/2.0, source.rows/2.0) Mat rot_mat ....
Transformation matrix from the angle in my previous answer.
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Ask your Facebook Friends
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In my C/C++ program, I'm using OpenCV to capture images from my webcam. The camera ( Logitech QuickCam IM ) can capture at resolutions 320x240 , 640x480 and 1280x960 . But, for some strange reason, OpenCV gives me images of resolution 320x240 only. Calls...
Started by Ashwin on
, 7 posts
by 7 people.
Answer Snippets (Read the full thread at stackoverflow):
I've done image processing....
DISPLAY 8 #define CV_CAP_PROP_DIALOG_FORMAT 9 #define CV_CAP_PROP_DIALOG_SOURCE 10 #define CV_CAP_VIDEOFORMAT,0,0); break; case CV_CAP_PROP_DIALOG_SOURCE: result = capDlgVideoSource(capture->capWnd highgui.dll .
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I am using OpenCV and saving as a jpeg using the cvSaveImage function, but I am unable to find the jpeg compression factor used by this.
What's cvSaveImage(...)'s Jpeg Compression factor How can I pass the compression factor when using cvSaveImage(......
Started by The Unknown on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at stackoverflow):
You can probably find this by poking around in the source code here: http version of OpenCV, and was able to confirm the above via this bit of throwaway code:
#include "cv.h.
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I am trying to compile OpenCV with icc on Linux, in order to profile the execution with intel tools.
I installed the last version of icc with default options. I tried both "user" (icc is installed in my home) and "sudo" (icc is intalled in /opt) installs...
Started by Jérôme on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at stackoverflow):
Since version 1.1, OpenCV is supposed of OpenCV 1.1 (which is the....
OpenCV is close to Intel, as Intel is highly involved in this project.
Ok, I finally compiled OpenCV with ICC.
Ask the library provider which version to use.
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Hi,
i wonder if there is a easy way to convert my float array image to iplimage, which can be handled by opencv. Of course i could create an empty iplimage with the same size and just copy ever pixel from my float array image to the emplty iplimage, but...
Started by zhengtonic on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at stackoverflow):
You can do....
Just delete the structure in the end.
But then don't use deallocation functions on it.
The field imageData will point to your original array.
You can fill an iplimage structure 'by hand' to describe your array following the comments here .
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Hi,
I have installed opencv c libraries from package management into my Kubuntu 9.10. I wrote a small image modification program that uses those libraries, but I can't compile it, because every time I try to compile I get the error message that the functions...
Started by zaplec on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at stackoverflow):
You forgot to link your....
You can run (untested):
make CFLAGS="$(pkg-config --cflags --libs opencv)" your-program
"undefined reference to" is a linker error.
OpenCV uses pkg-config , the standard way to locate libraries and headers on unix.
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Hi to all,
I'm capturing video from my webcam using OpenCV on MacOSX. It works fine but when I try to play on QuickTime my captured video it plays too fast. i.e. I capture from camera for 10 seconds but when I play on QuickTime the video is 2 seconds....
Started by Andrea Girardi on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at stackoverflow):
Works pretty fine kind of codec did you use? and could you tell me if you compiled opencv with just ffmpeg.
I am trying to run opencv via JNA in java.
This sounds very interesting..
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The two functions in openCV cvLoadImage and cvSaveImage accept file path's as arguments.
For example, when saving a image it's cvSaveImage("/tmp/output.jpg", dstIpl) and it writes on the disk.
Is there any way to feed this a buffer already in memory? ...
Started by The Unknown on
, 4 posts
by 4 people.
Answer Snippets (Read the full thread at stackoverflow):
Is providing a custom "data destination (or source) manager" which is defined in jpeglib.h:
struct jpeg_destination, (j_compress_ptr cinfo)); };
Basically set that up so your source and/or destination.
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