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Questions tagged [haar-classifier]

Visual Neural Network recognizer that breaks up an image into digital image features (nose, mouth, etc) to improve accuracy in object recognition.

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Estimate of the crowd head count in static image (openCV)

We are trying to count the number of people in a static image, this number may be as large as 100-150. I did some research and found some ways to do this, but we are not sure which one will work the best.So my question is this, will haartraining…
user2718964
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Gender Recognition Haarcascade

I've been doing some research and attempted to build a haarcascade for identifying gender. I read this article, which describes how they did it, which i also tried to do : http://www.ijcce.org/papers/301-E043.pdf I used a library of 228 male faces…
user3298970
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OpenCV: Lucas Kanade applied within certain area (to detect facial features)

I am trying to preform face tracking with the Lucas Kanade algorithm with Haar Cascade Classification. The Lucas Kanade is successful and can track the user, but unfortunately, some of the good features to detect points are wasted on corners in the…
user3377126
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Solution for object detectors that are far worse than object classifiers

I've built a classifier that has high accuracy in classifying certain objects of interest, given images that focus only on those objects. However, when this same classifier is applied to an object detector that scans a larger image using selective…
user961627
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OpenCV Haar Training error

Hi i'm working on creating my own classifier to detect an object underwater. Everything is working fine until the final step when i try to generate an XML file using the opencv_haartraining i don't get an error but the program seems to exit without…
omar
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What can I detect with the haar classifier?

Lets say I want to train the cascade to recognize one object, but this object has different shapes. For example if I want to recognize a cup. You know there are cups in many shapes but also they have their similarities. Or another example: a…
dephinera
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program crashes with haarcascade_fullbody.xml

I am working with OpenCV for Qt. I am working on doing a program which is able to detect several objects. So far I could make a face, eye and nose detector, but when I try to make a full body detection I get either totally wrong detections, no…
Laura López
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Render 3D A Object On Top of The OpenCV Camera

Is it possible when I detect an object with the haar cascade classifier, to render a 3d object over the detected area? Lets say I detect a face and I want to render super mario in the area of the face. I know I have to use OpenGL ES for rendering…
dephinera
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OpenCV detecting multiple objects in one window - not being drawn

I have a OpenCV program using multiple Haar Classifiers to detect multiple objects in a single window. The first object is detected and the ellipse is drawn as it should however when the two secondary objects are detected the circle is not drawn for…
Colin747
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Out of memory error in trainCascadeObjectDetector in MATLAB

Getting the following errors during training: Error using ocvTrainCascade Error in c:\temp\a3p0_3607_2384\win32\opencv\modules\core\src\alloc.cpp: Insufficient memory. Error in trainCascadeObjectDetector (line 265) …
T.Z
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Haar cascade training OpenCV on Mac OS X

I am trying to develop a simply Android OpenCV program which can detect a black dot on white paper using a Samsung Galaxy S3 camera. To do this I've just copied the face detection program from OpenCV samples and I want to add my own Haar cascades to…
kolorszczak
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how to disable the need of sqsum when calling opencv's cv::integral() function?

I want to call cv::integral() function, located at sumpixels.cpp . I'm not using the integral image calculated for the square sum (3d argument - OutputArray _sqsum) , and would like to disable its calculation in order to save run time. I'm not TOO…
brkeyal
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OpenCV - needing to detect side/front/back upper bodies(neck + head), heads(from back and front) - training classifier properly

This is my first ever OpenCV Haar classifier training and I need to detect people and blurr out their faces/heads/upper bodies(head+shoulders) in images and I am taking static images, where the camera does not ever move. I started extracting…
Georgi Angelov
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Using opencv + viola jones running slow

I am trying to implement Face detection viola jones classifier using opencv cascade. This is the code i am using: int main( ){ SYSTEMTIME tm; GetLocalTime(&tm); printf("Date: %02d.%02d.%d, %02d:%02d:%02d:%02d\n", tm.wDay, tm.wMonth, tm.wYear,…
Hadi
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jsfeat function is not accessing

I am working on JSFEAT but when I start using this library the function is not accessing. resource at: