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I need collection of sample images (negative images, or also called background images)
for haar training using opencv. It is written that I need to have a lot of them. About 5000 or 10000. Do you know where to get them?
This site have some haar negatives from various databases. You can download by svn: svn co http://tutorial-haartraining.googlecode.com/svn/trunk/data/negatives/
UPDATE: It is possible that the repository died, so you can go to GitHub. I found one that was exported automatically from google code here.
you can find it anywhere especially in google.. negative images are just images that does not contain your positive images/samples which is the object of interest.. anything that doesn't contain your object of interest can be a negative samples..
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As a newbee for Simulink, I am fascinated with the model-based design of algorithms in Simulink. So naturally, I am looking for what others have done with Simulink in computer vision area. Of course, I know Mathworks provided with many examples and exchange site with more but I am searching for more models. Is there any online community to share simulink models?
Well Peter Corke provides a handy pair of Matlab/Simulink toolboxes for Robotic Control and Machine Vision. It might not be exactly what you need, but I have found them extremely useful.
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I am looking for a way to implement 2D-3D non-rigid image registration with minimal efforts and maximal reuse of existing code. So far I have found:
http://plastimatch.org/
http://elastix.isi.uu.nl/
However, these libraries appear to be be limited to rigid 2D-3D registration, and the non-rigidity is mandatory in my case. Any help is welcome.
Elastix does indeed support non-rigid registrations, hence the name ;)
You can find a list of some default parameter files here: http://elastix.bigr.nl/wiki/index.php/Default0 which is great if you do not want to dive into details. Check out the B-Spline text file if you want to perform a non-rigid registration.
Most important parameters are the FixedImageDimension and the MovingImageDimension. The rest should be ok.
Calling Elastix works like this:
elastix -m <MovingDataFile> -f <FixedDataFile> -out <OutputFolder> -p <ParameterFile> -threads <NumberOfThreads>
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I realize this is a difficult question without a straightforward answer, but I'm hoping for some suggestions of frameworks or libraries I should start with.
Imagine a view that contains a background image, some smaller images overlaid, and a small video (an MPMoviePlayerController view) overlaid. What I need to do is create a composite video of the entire view. So the final result saved to disk would be all the images and the video combined into one video file.
What AV tools are available that would be most likely to help accomplish this?
AVAssetWriter seems to be the best option for doing this.
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Is it better to implement blob(connected component) handling manually in openCV or are there any good libraries for the same? I found cvblob and cvBlobsLib? Are these libraries used on a standard scale?
I also looked into this and decided in the end to write my own CCL routine. It seems like a serious omission from OpenCV and no doubt a lot of people are "reinventing the wheel" as a result. Note however that you may be able to use findContours, depending on your exact requirements - see this question.
You should take a look at the new opencvblobslib. It has great features like multi core support.
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Please tell me where I can find video tutorials of Ab-Initio ETL Data Ware Housing tool.
I surfed in google but i did not find any materials.
Thanks in Advance.
I doubt you will be able to fine these anywhere other then contacting Ab Initio directly. They do not readily share their documentation.
Abinitio have a full non-disclosure policy with their customers. You wont find much freely available on the internet. If you want training in Abinitio (and you are a customer of theirs) then I suggest you contact them directly.