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Questions tagged [vlfeat]

VLFeat is an open source library that implements popular computer vision algorithms

VLFeat includes implementations of HOG, SIFT, MSER, k-means, hierarchical k-means, agglomerative information bottleneck, SLIC superpixels, and quick shift. It is written in C for efficiency and compatibility, with interfaces in MATLAB for ease of use, and detailed documentation throughout.

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"Attempt to execute script as function" error - Empty MEX folder after compiling

this is my first time using Matlab & vl_feat library. I installed vl_feat library and added the library path to Matlab path using addpath(genpath()) command. But when I try to execute vl_sift function, it gives error "Attempt to execute SCRIPT…
Sasidhar
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ndk-build using amadillo (blas lapack) and vlfeat lib

I am trying to compile c++ code written using armadillo that I have uncomment blas lapack in config.hpp and also vlfeat (vl.so) in Andriod make file. In Jni folder I have the following Andriod.mk LOCAL_PATH := $(call my-dir) include…
afsaneh
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VlFeat kdtree setup and query

I've managed to get VlFeat's SIFT implmentation working and I'd like to try matching two sets of image descriptors. SIFT's feature vectors are 128 element float arrays, I've stored the descriptor lists in std::vectors as shown in the snippet…
Josh
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vlfeat-0.9.19/toolbox/mex/mexa64/libvl.so: undefined symbol: GOMP_parallel

I have compiled vlfeat on linux (archlinux ) with making mex for matlab by the following command make MEX=MATLABROOT/bin/mex in the VLFEATROOT directory. Output seem well as no error was reported. BTW, I use gcc4.7 to compile the stuff above. I…
Bingqing
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How can I compile the vlfeat and mexopencv libraries in MATLAB using the Visual c++ compiler?

I am working on a computer vision project, and I need to use the vlfeat and mexopencv libraries, I am working with MATLAB R2008a and I cannot change the MATLAB compiler to compile and setup the libraries. I have installed Microsoft Visual C++…
Barq
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SVM prediction of data in cells rather than the expected matrix

For my svm training and prediction I am using vl_svmtrain, the documentation of which can be found here: http://www.vlfeat.org/matlab/vl_svmtrain.html [W B] = VL_SVMTRAIN(X, Y, LAMBDA) trains a linear Support Vector Machine (SVM) from the data…
StuckInPhDNoMore
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Error using vl_gmm - Attempt to execute script as function

Hello I want to use Fisher Vector for my SIFT descriptors. I tried to use the function from VL_FEAT. I added the directory in MATLAB and also run vl_startup. It runs successfully but when I try the example It gives me this error: Attempt to…
Aadnan Farooq A
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VLfeat Binary Classification

Training: [w, b] = vl_svmtrain(feature_matrix.FeatureVector, label_vector.labelsMatrix, 0.1) ; Classification: [~,~,~, scores] = vl_svmtrain(feature_matrix.FeatureVector_temp, labels, 0, 'model', w.w, 'bias', b.b, 'solver', 'none') ; I have…
sheetal_158
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Issue while using VLfeat's vl_kdforest_query_with_array

I am trying to use VlFeat's vl_kd_forest_query and vl_kdforest_query_with_array. The documentation is poor. All it says is that vl_kdforest_query_with_array "can" make use of multiple cores for running. Does anyone know if this function already uses…
Nishita Sant
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Embedding VLFEAT into python application

I installed VLFEAT in my computer, I test it works just fine sift -h Usage: sift [options] files ... Options include: --verbose -v Be verbose .... Version: driver 0.1; libvl 0.9.18 Now i want to invoke the command…
hb.Sara
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VlFeat DEBUG macro

I am using the VLFeat library (http://www.vlfeat.org/) in Microsoft Visual Studio 2012. My problem is: Whenever I run the program, three Debug lines get printed to the console. I looked into the source code; it seems like these three lines only get…
RUDI11
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Sift Implementation in Vlfeat

I am using the Sift implementation by Vlfeat.org. It has the follwing function which is supposed to save the features to a file. def process_image(imagename,resultname,params="--edge-thresh 10 --peak-thresh 5"): """ process an image and save the…
Erdnase
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how to use Vlfeat in Octave in window 7?

I use octave and want to use Vlfeat to do my project in Windows 7. The website has suggestion to use from Octave as below: I complete to install package image according to the code in green (first) box. However, I've got stuck to the code in red…
bemygon
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VLFeat SVM storage

I am working with VLFeat and I have code that trains a linear SVM on my dataset. I would like to save the SVM to a file somehow so that I can load it up later and test it on several other datasets. What is the best way to do this? edit: I am using…
Max Ehrlich
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VLFeat hierarchical k-means: number of nodes in the vocabulary tree

In hierarchical k-means, the vocabulary tree of depth D, branch factor K should have total number of nodes (excluding the root node) as follows: nodes = K + K^2 + ... + K^D nodes = (K^(D+1)-K)/(K-1) However, vl_hikmeanshist gives the histogram…
Tu Bui
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