How to use Opencv 3 particle filter api
I have built the opencv_contirb for opencv 3.1, and I got the tracking module. The document : http://docs.opencv.org/trunk/dc/d75/classcv_1_1TrackerSamplerAlgorithm.html#gsc.tab=0 The 3.0 doc also...
View ArticleHow to create mask from an image in opencv?
the mask which i want to create can be of some specific region of the image , For example  this is the image from which i want create mask of the...
View Articlegood samples for opencv_traincascade?
Hi all, I'm a newbie of opencv and recently I've done a project using opencv_traincascade with LBP feature. I have around 2000 pos samples and also around 2000 neg samples. And with these, I tried to...
View ArticlepyrDown, pyrUp vs resize (blur operations)
What are pros and cons of pyrDown? What is quality and performance difference between pyrDown/pyrUp and resize? I have created this code to make tests. I am using 2557x3993 RGB image gained from...
View Articlebuild opencv3.1 on mac for iOS failed
I had used cmkae to build opencv3.1 on my mac successes, and passed testing on python script. when I try to build the opencv framework for iOS ,it failed: my input build command is (version of python...
View Article(invalid device function) in...
Hi I've been trying to update some code to run on a 1080 that ran fine on a 970 under Cuda 7.5. Initially I had some problems with the build, but after replacing the thrust that comes with Cuda 8.0rc...
View ArticleHow to stream video from IP camera using openCV python
I am trying to stream video from an IP camera using opencv python.
View ArticleSimple image stitching (C++)
I'm having a hard time finding a tutorial that explains how to do image stitching. I've read https://ramsrigoutham.com/2012/11/22/panorama-image-stitching-in-opencv/, but it's only a code example, and...
View ArticleStitching without warping
Hello. Now I use opencv for stitchig. But the code is not working fast. I looked at that thing takes a long time a mask and image warping. Here: Mat K; cameras[img_idx].K().convertTo(K, CV_32F);...
View Articletemplate matching
Hello In an image drawing (eg scanned) the user selects a specific region using a rectangle (some drawing object). This is the template. Alternatively it may be loaded from a list of images. My...
View ArticleQuit if There's No Match
Hello everyone, I'm working on a image-processing project with Java, Appium on mobile devices. In the code, I'm using Canny edge detector for template matching. But if there's no templae in image, **it...
View ArticleClassifier not building
I'm trying to build a classifier but keep getting the above error. I have over 800 positive images in the vector file and over 1300 pics referenced in the text file. If anybody can give me an idea of...
View ArticleLoad a jpg image from memory
From an IP camera I've read in a jpg image to a buffer in memory. If I write this buffer to a file "picture.jpg", I can open it directly in Windows. I can also open the file with OpenCV: Mat image;...
View Articlealluring, however for men there are just a couple. Also,
For a lady, there are wide assortments of approaches to look alluring, however for men there are just a couple. Also, when men magnificence Beard Czar is concerned, facial hair assumes a key part. In...
View Articletemplate matching
is this method suitable to detect if a object, like say a glass on a table moved somewhere else ? Is it scale invariant ?
View ArticleIs it possible to use different groups of LDR images to resolve the camera...
Hello, Thanks to OpenCV, we achieve to generate one HDR and recover the camera response. For our use case, we need to retrieve the camera response accurately. We noticed that from one HDR to another...
View ArticleIs there a list of known (cameralink) frame grabbers compatible with OpenCV?
I am actually interested in combining video/images from 2 framegrabbers (one of them a cameralink framegrabber) on the same machine using OpenCV. The indication of any cameralink frame grabber that...
View ArticleImage not loading
I am using OpenCV 2.4.9 When I try to load an image using imread, the code does not find the image. Even when I use cvLoadImage, explicitly giving the path of the image, it does not read the image....
View ArticleFrame of depth-map? (reprojectImageTo3D)
Hello everyone, i can't understand in which frame the depth-map is. My setup is composed by two iDS UEye (2 RGB cameras). With the use of the Opencv libraries, I implemented the computation of the...
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