Questions tagged [computer-vision]
Computer vision is a field that includes methods for acquiring, processing, analyzing, and understanding images and, in general, high-dimensional data from the real world in order to produce numerical or symbolic information, e.g., in the forms of decisions. From Wikipedia: http://en.wikipedia.org/wiki/Computer_vision
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How to remove the hotspots from given image by using Python and opencv? [closed]
In the picture below there are some regions which are very bright (i.e. more white). Some bright regions are wide and some are narrow or thin. The red box covers one such wide bright spot, and blue ...
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What is YIQ color model? [closed]
As we know that RGB monitors requires separates signals for red, green, and blue components of the image but television monitors uses single composite signals. For this composite signal use YIQ color ...
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What would be a good approach to applying computer vision to automatically edit out the downtime in tennis video?
I have an iOS/macOS tennis app that now lets the user import video, and I would like to add the ability to automatically edit out the significant amount of downtime where players are not in a rally or ...
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Multithreading with duplicate matrixes? [critique/insight wanted]
I'm working on a video streaming project for drones with opencv where I want to apply multiple stacked image manipulations on a 2D input matrix. I was advised to make all manipulations calls non-...
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Fuse 3D-Points in Bundle Adjustment?
I'm actually implementing my own Pose-Estimation/- and -Refinement pipeline. For this purpose I use one moving mono-camera. Then I take the consecutive images to estimate the pose and triangulate the ...
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Move the onscreen circle when camera moves
I have a script that accesses my webcam and displays the captured video on the screen. I can also very easily draw a circle (a rectangle, it doesn't matter) over the video.
When I move the camera ...
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Designing a facial recognition systems database
First of all, I hope im in the right stack exchange.
So I'm trying to build a facial recognition system, e.g. one that recognizes a face and compares it to a database of known faces. For the first ...
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What techniques are there to detect the objects direction of travel?
I have been looking into object detection and tracking for a project that I am working on but I can't yet seem to find any techniques that I can make use of to utilise the information from object ...
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Web GUI for Python scripts
I have several but independent computer vision pipelines which were original planned to run by a user via a cmd (task1 -> script_1.py, task2 -> script_2.py and so on).
All pipelines share some code (...
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Logging/Debugging of computer vision apps
When I'm writing an computer-vision program (using OpenCV and Python) I need to print/show a lot of intermediate results in form of images (using cv2.imshow(..)) for debugging purposes to find out ...
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three overlapping project - how to organize
At the moment I am developing three scientific software projects (computer vision) in parallel in Python and scratching my head about organization, clean code and easy extensible/to maintain code.
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How can I detect a touch event in a computer-vision blob-tracking system?
Say I have a computer vision system capable of tracking multiple colored blobs. Further, assume I want the blobs to represent "fingers" in a multitouch system. Now, I have many examples I can look at ...
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Difference between Sfm and 3D reconstruction?
With respect to computer vision (CV), I always hear these three terms used almost interchangeably:
Structure from motion (Sfm)
3D reconstruction
Stereo vision/processing
However from what I've read, ...
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Are the various branches of computer vision completely distinct? [closed]
Computer vision includes:
Character recognition (converting an image to text)
Face recognition (detecting a face in an image)
Object recognition (detecting various objects in an image)
Human ...
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How is it possible that facial recognition software can work, but a reCAPTCHA can't be solved by a computer
If software can be built to recognize faces and match those faces to names, then how is that CAPTCHA works? Recognizing letters seems a lot easier than matching faces.
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What algorithms would suit image colour summarization?
I would like to analyse a set of hundreds of thousands of product images (clothing, electronic goods etc) and retrieve the dominant colours in each. I'm only interested in the top 3 or 4 colours. The ...
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Which Computer Vision / Image Processing technique would solve light imbalance in images?
Given a colour image whose light intensity is dim at the edges and bright in the middle, such as [dim bright dim], which computer vision technique would be recommended to correct this imbalance? ...
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Measuring "novelty" of data
I have a heuristic in mind that should allow me to "score" data based on "novelty" that I would like to work in real-ish time.
In this case, I mean novelty in the sense that the data source is ...
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shall a vector2 extends a vector3 or is it the opposite?
Perhaps the question might be tied to a theoritical or mathematical forum, but since it is for programming purpose, i ask here first:
In a computer vision context, i write a couple of interfaces ...
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What is watershed in the context of image processing?
I am new to image processing using Python. Now I am learning OpenCV and the mahotas module in Python. Many functions in these modules are related to watershed of an image. I don't know what ...
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Computer vision algorithms (how is this possible?)
I recently stumbled across a company that has created what appears to be a computer vision technology that is capable of detecting shoplifting automatically and alert its users.
LINK
Watching some ...
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Seperable Kernel, MMX/SSE and TCP Transmittal of them?
So I was reading about Java Convolve and someone said that it may be faster than the MMX / SSE implementation. In it one of the comments had a kernal array and said it was seperable.
What is a ...
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Would this violate any copyright issues? [closed]
I am currently publishing a paper on skin detection. However, I need to find the appropriate histogram bin size for each colorspace. I recently came upon a paper that published what it found to be the ...
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Options within OpenCV related to image difference analysis and reporting
Scenario: Stationary view with sequential timestamped samples in 2D-color where the comparison is only done between one pair of neighboring samples.
Background:
Have never used OpenCV before,
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How could I implement multitouch gestures without a start event?
While working on multitouch, one of the problems I've run into is the fact that nobody seems to do gesture recognition without some kind of init event, whether it's a mouseclick or contact with a ...
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How can I make an app using mobile's camera to detect words? [closed]
I am trying to make an app that will capture the video from the mobile's camera and detect in real time all the text that will be captured. I would like to make it in C# (for e.g. Windows Mobile) but ...
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