did someone tried to implement DWT in opencv or in C++? I saw older posts on this subject and i didn't find them useful for me, because I need a approximation coefficient and details as a result of...

I have been experimenting with face detection in OpenCV (Open Source Computer Vision Library), and found that one could use Haar cascades to detect faces as there are several of them provided...

I'd like to create an object detector based on cascade classifier, the only problem is that LBP and Haar features are not rotation invariant. The first thing that comes to my mind is to rotate the ...

The OpenCV Haar cascade classifier seems to use 24x24 images of faces as its positive training data. I have two questions regarding this: What are the consideration that go into selecting the tra...

Ideally what I'd like to find is something with a simple, straightforward interface to multiple wavelet categories, like the GSL, but which has a license that lets me use it in proprietary so...

In steganography, the least significant bit (LSB) substitution method embeds the secret bits in the place of bits from the cover medium, for example, image pixels. In some methods, the Discrete Wav...

It would be best if someone could explain the numbers/values in the cascade.xml entirely. Example in: <!-- stage 0 --> <_> <maxWeakCount>3</maxWeakCount> <stageThresho...

I am trying to train a haar-like classifier for pedestrians in OpenCV using 3340 positive images and 1224 negative images. (in a .txt file I keep the negative image names i.e negatives(1).bmp, and ...

I am developing an application for iOS that needs to detect when the user yawns. What I did is include Open CV and find faces using a haar cascade, and then find mouth inside the faces (too using ...

using CvRect i am able to detect faces coordinate detectFace(IplImage * pImg, CvHaarClassifierCascade * pCascade, CvMemStorage * pStorage) But my problem is How to find out whitePixelValue when...

So I have an image like this: I want to get something like this (I haven't drawn all lines I want but I hope you can get my idea): I want to use SURF ( (Speeded Up Robust Features) is a robus...