Support Vector Regression prediction values
I am training a regression model to predict a label given a feature vector. Training and testing samples are drawn from 10 classes. I have trained SVM for regression as shown in the code below void...
View ArticleSpeed of filter2d vs. matchTemplate
For educational purposes I'm trying to understand following relation: I'm applying a blur kernel (32x32) on an image (500x667 Grayscale, 8 bit for a single channel) which takes approx. 107ms using...
View ArticleHow can I wait unitl the image is done writing?
I have a program, and it takes, and saves a photo at the start of operation. As is, I wait with a sleep, or delay, for an amount of time that Ive observed to be necessary to finish writing the image...
View Articleline segment detector giving large number of lines
Hello, I'm new to OpenCV and new to extracting info from images. I have implemented the line segment detector to operate on an image that I have skeletonized (edges do not work for my purposes, I need...
View ArticleUnderstanding bitwise_and operation
Hi all, I'm new to openCV. I'm a bit confused about bitwise operation. Appreciate if you can help me to clarify some things. 1. Bitwise operation is for binary image only? cause from the (admittedly...
View ArticleDeskew Text with OpenCV and Python
Hello, i'm new with OpenCV and i want to deskew an image that have a skew text: First i read the image in GrayScale and Binarize it, then i try to...
View Articlehow do I fix OpenCV importing errors?
SO no matter what I did I keep on encountering the same errors I am trying to import OpenCV into android studio 2.1.3 and i have followed all the instructions carefully and tried all available...
View Articleimread all files in directory
How would i modify this example to allow using a asterisk * as a argument so it would process all files instead of just the one argument....
View ArticleComplicated compilation for python 3.5
Hello, Compilation used to be a piece of cake for python 3.4. However, ubuntu 16 ships with python 3.5, and things get complicated for openCV from the latest git pull. Yes, I have followed the...
View ArticleTransposing movement points between a perspective camera and a mercator...
I’m wrestling with a question about whether I can take a perspective camera with movement points and transpose them onto a mercator map. I don't know if this is even possible without a 3D camera. As...
View Articlecv::Mat.forEach w/ index
AFAIK the signature of the function param of Mat.forEach is: void (*)(const T value, const *int pos); Now, I'm not sure what the pos argument is and I don't think the documentation is absolutely clear...
View Articletext recognition using opencv contrib text module
Hi I would like to be able to recognize character in a image. For that I try to use the sample code give...
View ArticleLevenberg Marquardt algorithm in bundle adjustment
I know a little of LevMarq algorithm, but I am unable to understand how is it implemented in opencv. Can anyone explain it a little, the process flow...
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Which Method To Determine If Perhaps Plastic Handwheels Is Precisely What You...
Plastic handwheels is a little something that you ought to use if you've got a house along with not much space and are actually sorting different things or, more inclined, have an organization and...
View ArticleBRISK taking too much of time
Hello, I developed an android application using BRISK detector and descriptor. When I try to load the application into my mobile it's taking too much of time to install. Once the app is installed and...
View ArticleLoss of Class fisheye correcting wide-angle camera in OpenCV 3.0
Hello everyone, I'm trying to find a method to stitching two images which are from two fish-eye camera. But I have no idea how to correct the original images. I have tried to do this with class fisheye...
View Articleyaml python 3.0
I have to read a YAML file in python using opencv 3.0 . I have found this solution in one of the previous questions but it is not applicable for version 3.0: yaml_data =...
View ArticleDecreasing the eigenvalue (road to success)
So i'm in the process of increasing face recognition by adding preprocessing (CLAHE, Tan-triggs, Equalizehist) and hoping that will give me better results. But looking at some posts here and there, the...
View Articlewhat include file for using glob?
My apologies - but i can't find out what include file to use for using the glob function. I included utility.hpp. I noticed precomp.hpp but i can't find that in my include files. Sorry this feels dumb...
View Articleframeskipping
I wanted to use something like for(;;) { cap << frame; if (frameno % 3 == 0) frameNo++; { Do all our stuff } imshow Depending how high i set my frames to be skipped the face rectangle just...
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