FaceRecognizer - using multiple models
I posted this as a comment on another question, but didn't get any answers so am trying again. I am using the eigenfaces FaceRecognizer to identify faces. I would like to be able to scale up to 1000's...
View ArticleAssertion error in EigenFace train
I try run example from https://github.com/Itseez/opencv_contrib/blob/master/modules/face/samples/facerec_eigenfaces.cpp , but give error. I dont understand why it occurs (x64 OpenCV 3) . I will project that chessboard image into a plane but I want to apply some scale factor and rotation angle in x and...
View Articlesfm::reconstruct() flat output
**Problem** I cannot get `sfm::reconstruct()` to output anything with a significant z dimension (|z|>1). Everything appears very flat, even if I run the demo `recon2v` on the demo data. When I run...
View ArticleSiftDescriptorExtractor is undefined
Hello forum, I am trying to use the SIFT function SiftDescriptorExtractor detector; but I am getting an error SiftDescriptorExtractor is undefined. What #include do I need ? I always have this problem...
View Articlehow do I separate the channels of an RGB image and save each one, using the...
how do I separate the channels of an RGB image and save each one, using the 2.4.9 version of OpenCV?
View Articlelibopencv_contrib.so with opencv 3.1 ?
Hi , I'd like to know if we can build libopencv_contrib.so with opencv-3.1 and opencv-contib ? reference: https://bugzilla.redhat.com/show_bug.cgi?id=1329790
View ArticleHow to use opencv 3 with opencv_contrib
Hi I am trying to use opencv_contrib code with opencv 3. I am following this instructions here https://github.com/Itseez/opencv_contrib Step 2 says to select the opencv source code folder and the...
View ArticleSparesMat::operator++() vs SparesMat::operator++(int)
Both SparesMat::operator++() and SparesMat::operator++(int) have the same definition in the docs, namely "moves iterator to the next element". Since it is not defined as SparesMat::operator++(int...
View ArticleClicking on a point in an image finds the closest contour points
**Update: As suggested. I added my current code that detects all boundaries of each shape (not desired) with another problem that these boundary lines can be a few pixels wide and form inside and...
View ArticleBlending artifacts in OpenCV image stitching
Hi there, I am using OpenCV to blend a set of pre-warped images. As input I have some 4-channel images (*.png or *.tif) from where I can extract a bgr image and an alpha mask with the region related...
View ArticlefeatureEvaluator->setImage();
Hello,at cascadeclassifier.cpp file,method fillPassedSamples() there is this line featureEvaluator->setImage(img, isPositive ? 1 : 0, i); Can anybody provide a detailed description about what this...
View ArticleMinoru 3d: How to run 2 cameras simultaneously?
use Minoru 3D stereocamera and want to capture images from left and right camera at the same time with OpenCV. I use Windows 7 64 bit I have tried all solutions that I found in web, trying it with...
View ArticleErrors when predicting from a Neutral Network
Hello everyone, I am trying to train a neutral network in opencv using one hidden layer network. Everything seems fine but the program crashes when the predict function for the model is called. Below...
View ArticleSobel Filter
i meet this [page](http://rodrigob.github.io/html5_demonstrations/boundaries_estimation/boundaries_estimation_dart.html) and wonder is OpenCV having a ready solution to get same output? ![image...
View ArticleHaarcascade or HOG for lego identification ?
Hi everyone, I would like to devellop a system to identify lego blocks, the aim is to verify if a lego set (a set of different lego blocks) is full using a single image for identification. The system...
View ArticleFindHomography algorithm : some doubt
Hi, I have some doubt about FindHomography algorithm. I wrote a program to test it. In this program I have rotated an image look for descriptors in original image and rotated image. After matching I...
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