Tagged Questions

Computer vision enables images, or sequences of images, to be processed by a computer using an algorithm. The aim of the algorithm is to extract information from the image. Sometimes this information produces an updated image or sometimes other measurements. An example of an updated image is to ...

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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 ...
1
vote
2answers
25 views

Why Sobel operator looks that way?

For image derivative computation, Sobel operator looks this way: [-1 0 1] [-2 0 2] [-1 0 1] I don't quite understand 2 things about it, 1.Why the centre pixel is 0? Can't I just use an operator ...
0
votes
1answer
16 views

How is it possible to choose which face to detect for face detection on android camera?

How is it possible to choose which face to detect for face detection on android camera via getting a list of faces from Camera.FaceDetectionListener? I wanted to choose the face via an algorithm and ...
1
vote
1answer
19 views

How to move epipole to the outside of the image

Hi i had computed the fundamental matrix from two images and i found out that the epipoles lie within the image. I cannot do the rectification using matlab if the image contains epipole. May i know ...
3
votes
1answer
40 views

Relevance Vector Machine

I am looking for a descent implementation of Relevance Vector Machines. Can anyone recommend an python library or C++ implementation that I could interface? Thanks heaps in advance, EL
0
votes
1answer
30 views

Ignoring bright motion from an image

I am currently trying to write a C# app that will detect motion. For a 'blob' motion, if the object is of high luminance then ignore it. I do this to remove moths/bugs that come close up to a ...
1
vote
1answer
35 views

fastest way to display “unique object” on screen

So, I have written programs to simulate couple things like opening the browser, searching for a URL, zoom in , zoom out, etc. I am video recording the whole activity with a really fast camera(120fps). ...
7
votes
2answers
49 views

How to crop and rotate an image to bounding box?

I have a dataset of thousands of images containing hands I also have .mat files which contain the coordinates of 4 corners of the bounding box However, the edges of these bounding boxes are at an ...
-5
votes
0answers
26 views

which computer I must buy? [closed]

I am a computersince student &I live in Kabul Afghanistan. I want to buy a computer. I have about 1500$ up to 1800$. graphic(usually I play heavy games),small size,beautifulness & portablity ...
0
votes
0answers
33 views

Finding the distance of object from a logitech camera .

I want to find the distance of an object from camera . Note here I am using single camera . Camera autofocuses to focus on planes at particular distance from camera . Is there a way I can find this ...
1
vote
1answer
30 views

Using get() and put() to access pixel values in OpenCV for JAVA

I am a beginner in using OpenCV for JAVA. I want to access individual pixel values of an image matrix. Since, JAVA jar for OpenCV doesn't offer nice functions like C++, I ran into some trouble. After ...
2
votes
2answers
45 views

How do you map Kinect's depth data to its RGB color?

I'm working with a given dataset using OpenCV, without any Kinect by my side. And I would like to map the given depth data to its RGB counterpart (so that I can get the actual color and the depth) ...
-3
votes
0answers
21 views

Pattern recognition in Video [closed]

I am creating a robot which has to navigate through a building and find a particular room by recognizing the nameplates. I know what's on the nameplates beforehand. How do I search for the nameplate ...
-1
votes
1answer
51 views

Performing k means clustering with a sample of the data [closed]

I'm a Medical Physics Master student and i'm currently working on my Thesis. The work consists of extracting features from endoscopic images and perform classification with an SVM. I have images of 4 ...
0
votes
0answers
54 views

Motion Detection in OpenCV [closed]

I need to do motion detection in OpenCV. The software should detect each and every important motion (human walking, car is driving) and not unwanted motions (curtain waves with the wind). OK, This ...

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