opencv3.0

I am trying to make a face tracker that combines Haar Cascade Classification with Lucas Kanade good feature detection. However, I keep getting an error that I cannot figure out what it means nor how to solve it. Can anyone help me here? Error: line 110, in <module> cv2.imshow('frame',img) error: /build/buildd/opencv-2.4.8+dfsg1/modules/highgui/src/window.cpp:269: error: (-215)size.width>0 && size.height>0 in function imshow Code: from matplotlib import pyplot as plt import numpy as np import cv2 face_classifier = cv2.CascadeClassifier('haarcascades/haarcascade_frontalface_default.xml') cap =

The link below use Matlab to remove non-text content from an image. I want to do the same thing with OpenCV in Java. I don't have a Matlab to try with and I am new to OpenCV. Though I know some basics about the theory behind the process, but it's kind of difficult to make the translation from Matlab language into OpenCV 3.0. And preferably in Java. http://www.mathworks.com/help/vision/examples/automatically-detect-and-recognize-text-in-natural-images.html ADD 1 - region detection with MSER (not resolved yet) For MSER detection, I can use the following code to detect the MSER keypoints. public

I have encountered a problem with the function imread() in Matlab (2014) and OpenCV (3.0) on Windows 7 with jpg files. I don't have the same values by reading the same file jpg and the same pixel. Here are my 2 codes : (OpenCV code followed by the Matlab code) and the values I have (mode debug to see in OpenCV, keyboard in Matlab) #include <opencv2\opencv.hpp> #include <cstdio> using namespace cv; using namespace std; int main() { Mat img = imread("test.jpg"); uchar pb = img.at<Vec3b>(0, 0).val[0]; uchar pg = img.at<Vec3b>(0, 0).val[1]; uchar pr = img.at<Vec3b>(0, 0).val[2]; int d = img.depth(

I want to use the LineIterator in openCV 3.0 using python, is it still available with openCV 3.0 built for python? It seems that the answers on the internet are all pointing to cv.InitLineIterator which is part of the cv module. I've tried importing this module but it seems like it is not included with the current build. Has it been renamed or strictly just removed? mohikhsan I've solved my own problem. Line iterator seems to be unavailable in the cv2 library. Therefore, I made my own line iterator. No loops are used, so it should be pretty fast. Here is the code if anybody needs it: def

I have been trying to remove the black background from the grabcut output using python opencv. import numpy as np import cv2 img = cv2.imread(r'myfile_1.png') mask = np.zeros(img.shape[:2],np.uint8) bgdModel = np.zeros((1,65),np.float64) fgdModel = np.zeros((1,65),np.float64) rect = (1,1,665,344) cv2.grabCut(img,mask,rect,bgdModel,fgdModel,5,cv2.GC_INIT_WITH_RECT) mask2 = np.where((mask==2)|(mask==0),0,1).astype('uint8') img = img*mask2[:,:,np.newaxis] cv2.imshow('img',img) cv2.imwrite('img.png',img) cv2.waitKey(0) cv2.destroyAllWindows() Above code I had written to save the grabcut output.