How can I detect complete body like hand , leg? [closed] - iphone

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Closed 10 years ago.
Using CIFaceFeature we can detect face feature. But I want to detect hand and leg too.
How can we detect these? Is there any other classes or logic using which we can detect these.

OpenCV is 'just beginning'. Recognition is hard problem and still remain unsolved at most part. There is no hand/leg detection in openCV. You have to train the data yourself using machine learning algorithm provide by openCV. You have to collect positive data (human body image for example) and negative data (non human body image) in order to train.
I suggest to look at this link to speed you up:
http://docs.opencv.org/doc/tutorials/objdetect/table_of_content_objdetect/table_of_content_objdetect.html
OpenCV haar training for static image
http://kang.blog.com/2009/08/12/how-to-use-haartraining-in-opencv/
http://www.technolabsz.com/2011/08/how-to-do-opencv-haar-training.html

Related

Give smooth effect of UIImage Stratch [closed]

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Closed 9 years ago.
I am Creating one application and i required following effects.
I don't know hot to start work. if any one know what is my first step for this effect then please guide me for how to stretch Hair like this.
effects Link1
effects Link2
I used following link and tutorial but not succeeded.
http://code.google.com/p/faceworkshop/
http://code.google.com/p/imgwarp-opencv/
http://docs.opencv.org/doc/tutorials/ios/table_of_content_ios/table_of_content_ios.html#table-of-content-ios
I think, I am going to wrong way...Plz help me.
The effect look alike it's an OpenGL object with a texture where you change the coordinates of the vertex nearest to the touch point. The OpenGL object has to be constructed out of triangles matching the form, which is probably done based on the hair image.

What is better for Image Processing learning/prototyping Mathematica or Matlab? [closed]

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Closed 10 years ago.
I am learning Image processing/Pattern recognition. My background is C++ and basics in OpenCV.
I am looking for a tool to learn how to test all the filters and algorithms on my images easier. Are Matlab and Mathematica suitable for this? If so, which one is better?
Thank you!
You can do great image processing in both languages, so there is no general answer to this question.
In your specific case, assuming that you have access to all the relevant toolboxes of both packages, I recommend Matlab, since its syntax is more similar to C++ than Mathematica's functional syntax. Consequently, Matlab may be easier for you to pick up. Note that many filters are already implemented in Matlab, and I assume also in Mathematica.
One of the Matlab blogs has just started a series on image filters. Also, you could try and adjust the MorphTool from the File Exchange to be able to play with the filters you're interested in.

how to remove background from image without matching background in MATLAB [closed]

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Closed 10 years ago.
how to remove background from an image without matching background.
For example if i want to remove background from this below image then for removing background sample background image should not be given.
I think there is no simple answer to this question. In the first place, you should find a method to tell Matlab what the background is. Read about segmentation (dividing image into coherent parts) .
In general, you will use different approach to different type of images. For example if there is always face on image you can utilize face recognition techniques and support them with some kind of edge detection and so on.

What's the technology behind Skype's anit-shake video recording? [closed]

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Closed 11 years ago.
Skype added an anti-shake feature in it's video conference app on iPhone. How can that be done?
This is quite a complicated thing to pull off, but it's probably a combination of some powerful blur detection/removal algorithms, and the gyroscope. I would start by looking into how to detect motion with the iPhone, and see what kind of results you can get with that. If it's not enough, start looking into shift/blur direction detection algorithms. This is not a trivial problem, but is something that you could probably accomplish given enough time. Hope that Helps!

how to use accelerometer to change voice (auto tune) [closed]

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Closed 11 years ago.
I am interested in creating an auto tune app and did a bit of research and apparently thats now possible by using accelerometer that apple provides but I have no idea how to do that. can someone help out by giving me a link to a tutorial or give me an example code to change the voice inserted into the function.
Thanks in advance.
The accelerometer reports back physical acceleration of the device. This has absolutely nothing to do with digital signal processing of a recorded waveform, and as others said, there will be no easy way to do this. You can browse the audacity source (plugins specifically) to see algorithms having to do with time-stretching and will see that this is very complex. Not only is the science of the signal processing complicated, the art of getting it to sound good (at all) is incredible.