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Questions tagged [cascade-classifier]

A particular case of Ensemble learning, which is based on the concatenation of several classifiers, using all information collected from the output from a given classifier as additional information for the next classifier in the cascade.

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LBP Local Binary Pattern for mouth detection in front face

There is someone who can direct me to find a lbp cascade classifier for mouth detection? I looked for but i didn't found anything. I found only haar files, i want to know if someone have a lbp classifier. Haar classifiers are so slow, decrease of 10…
user8744796
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opencv_traincascade train classifier using GPU

I have try to train my classifier using opencv_traincascade in my machine. When run it, it utilize 100% of my CPU but not use my GPU. I have install OpenCV 3.x in my Ubuntu 16.04. And I have GeForece GTX 1080 Ti/PCIe/SSE2. I success install the…
Bubble Bub
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Location of OpenCV & haarcascade_frontalface_default.xml

I am working with image processing using OpenCV. I have installed OopenCV 3.3.0 in Conda. I would like to find out the full path where my OpenCV is installed and where haarcascade_frontalface_default.xml is located. Any help is appreciated.
nk134
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Load classifier on Heroku Python

I am loading a cascade classifier from a file in OpenCV using python. Since the CascadeClassifier() method requires the filename to be the absolute filename, I have to load the absolute filename. However, I am deploying and using it on Heroku and I…
Ace Falobi
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How to detect cars in road that never move in complete video?

I used background subtraction to detect moving cars,and also to detect stopped cars on the road,but to accurately find non moving cars is tedious. I've tried cascade classifiers,but it gives too much false positives,and it would be helpful,if a can…
AKASH APARE
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Traffic Signal Detection with Cascade Classifier with OpenCV

I am working on " Controlling Raspberry Pi's GPIO pins according to change in traffic lights (Red, Green, Yellow)". Right now, I am focusing only on Traffic light detection part. For that, I am using Cascade classifier for Haar features. I have…
Sailorman
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Haar Classifier positive image set clarification

Could you please help understand several points related to Haar Classifier training: 1) Should positive image contain only the training object or they can contain some other objects in it? Like I want to recognize some traffic sign, should the…
haykp
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opencv by python erorr

I got an error message when I execute the python code mentioned below: Traceback (most recent call last): File "C:\Users\smart-26\Desktop\예제\face.py", line 28, in faces = face_cascade.detectMultiScale(grayframe, 1.1, 3, 0, (30, 30)) cv2.error:…
Kang
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how to recover cascade classifier training from a stage?

i train cascade classifier in 20k positive and negative samples but after 1 day because power outage, turn off my pc. now i want know there is way to recover my training from stage 3 or must began from first ? when i see (-data D:/Data/) Data folder…
ali kiani
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OpenCV Haar Cascade training parameters and time

I have been fiddling around with OpenCV's cascade trainer in an attempt to train my own classifier. The problem is that it has been training for 25+hours now and it is yet to even pass stage 1. Initially, I ran it with the following command nohup…
eshirima
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Detect face and apply a mask on it with openCV

UPDATE: here is opencv c++ sample and shows exactly what I want to do. Only thing is I need it with java. I have been working on a real-time Android application which detects face with front camera and add a mask on a detected face. So far face…
wlrs
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Are there any differences between cascading classifiers and image pyramid?

I'm currently working on an object detection project and having a bit of a problem on choosing my classifiers.
Myubash
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OpenCV Cascade Classifier load error iOS

Currently I am trying to using an OpenCV Cascade Classifier to detect faces in my iOS app. The problem is that when I go to load the classifier, it fails because the pathname to the "haarcascade_frontalface_alt.xml" isn't correct. Here is my…
NFarrell
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Detecting eyes using CascadeClassifier_GPU (openCV)

I'm trying to detect faces and eyes at the same time using cacadeClassifier_GPU in OpenCV. Detecting faces works fine but it doesn't detect any eye. I'm using opencv 2.4.9(gpu version) in visual studio 2010. Here is my code. for(;;) { cap >>…
Jongin Lee
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How to straighten a tilted face after cropping?

I'm doing a project on facial feature extraction. I have written MATLAB code for histogram equalization, face detection and face cropping. Now I want to straighten the face if it is tilted. Can you help me with the MATLAB code? Here is the code I…
Tejashree
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