pixel intensity are different from opencv to matlab
Hello, I am trying to convert matlab code to c++ code with opencv. And it's killing me..... The pixel intensity of the same image is different between opencv and matlab. The code used in opencv to...
View ArticleRemove lines from image
I am a beginner in OpenCV, I need to remove the horizontal and vertical lines in the image so that only the text remains ( The lines were causing trouble when extracting text in ocr ). I am trying to...
View ArticleIn installation of open cv i am getting error in downloading source forge...
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View Articlehow to decompose homography matrix in opencv2.4.9 or in matlab?
actually i computed homography b/w two aerial images. now i want to calculate translation rotation scale b/w these images. methods suggests that i have to decompose the homography matrix to get these...
View Articlecần hướng dẫn về opencv
tôi muốn phát hiện màu đỏ xong sau đó phát hiện chuyển động rồi chụp ảnh lại đối tượng chuyển động thì phải làm như thế nào. Tôi mới học về opencv nên còn nhiều điều chưa biết. Ai biết làm thì giúp t...
View ArticleCapture Mat copy to UMat fails on 32-bit app, works on 64-bit, timing?
Here's a interesting problem with OpenCV 3.1.0, this code fails with an cv:Exception in clEnqueue on a 32 bit build, and yes per MSVC Diagnoctics it grows to 2GB and fails. Same code/32bit-build with...
View ArticleProblem in thresholding of a part of image
Hi guys I have the following image  I want to extract the following part circled red in the image as shown ![image...
View ArticleOpenCV+PYTHON: HOGDescriptor readALTModel(filename)
Hi, does anybody know if there is a way to use the function readALTModel(filename) in the HOGDescriptor class with python/opencv? Thanks!
View ArticleUnable to load classifier in OpenCV for Android
I want to use face and eye classifiers in my application. The concept is to copy the contents of the classifiers xml files you have under Resources.Raw and add them to some folder under the...
View ArticleCompiling error with -lippicv
Hi,i've just installed opencv 3.1 and i'm trying to compile a simple code written in c++. When i try to compile ,it appears this : /usr/bin/ld: cannot find -lippicv collect2: error: ld returned 1 exit...
View ArticleBeaglebone Opencv: cam.read() throws error and timeout
Hi All, I am running OpenCV on a Beaglebone Black with Ubuntu. After I installed it I tried importing it into python. That all worked so I tried to capture video from a USB Webcam. I can run the...
View ArticlePython & OpenCV
Dears, I try to use OpenCV in Python, and running example such as import numpy as np import cv2 img = cv2.imread('messi5.jpg',0) cv2.namedWindow('image', cv2.WINDOW_NORMAL) cv2.imshow('image',img)...
View ArticleWhy mac cannot build opencv file ?
Hi there, I have mac El Capitan 10.11.2. I installed opencv 2.4.11 I follow many tutorials and non of them working. When I build my program like this cmake . make It generate the following errors. Can...
View ArticleHow to inherit from cv::ml::Algorithm class and overload its methods in...
Dear all, I would like to overload method *predict()* from the **cv::ml::RTrees** class in order to achieve array of beliefs for all classes instead of a simple class prediction. For this purpose I...
View ArticleHow does OpenCV detect objects using LBP features?
I understand that once you train a classifier in OpenCV it generates an XML file with the stages and features, etc. I have been able to understand the format of the classifier and the function of every...
View ArticlePython & Video - freeze
Dears, I got running exampe import numpy as np import cv2 cap = cv2.VideoCapture('vtest.avi') while(cap.isOpened()): ret, frame = cap.read() gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)...
View ArticleWhy is the color of all squares of a charuco board black? (Version 3.1)
Hi, I created a charuco board with the example application from the aruco module (create_board_charuco.cpp). I am suprised that the result is a board where all squares are black. In the las verion I...
View ArticleHow to plot a graph or histogram using Opencv?
Can anybody had a experience how to plot a graph or histogram using Opencv? I need to plot my result in a graph using Opencv. but couldn't found proper Idea ..>!!
View ArticleHOW EXACTLY TO Effectively Market Your Products Through THE WEB
Internet marketing may bring your business to the homes of individuals all over the world. This may greatly boost the traffic that your business sees. You must decide which types of business marketing...
View ArticleAlgorithm advice: defect detection
Hello, I'm looking for some advice with developing an algorithm for defect detection. Here are the kinds of defects I'm interested in identifying: - rocks in sand - rocks and branches in grass -...
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