2017-11-09 23:47:49 -0600 | commented question | Train haar cascade using all images Youre right in both arguments. My idea was to create a robust classifier as using multiple classifiers reduce the perf |
2017-11-09 15:39:52 -0600 | commented question | Train haar cascade using all images Thanks for your answer. The reason I stick to the outdated 3rd party is that the official documentation doesn't mention |
2017-11-09 15:33:00 -0600 | commented question | Train haar cascade using all images Thanks for your answer. The reason I stick to the outdated 3rd party is that the official documentation doesn't mention |
2017-11-09 12:19:32 -0600 | asked a question | Train haar cascade using all images Train haar cascade using all images Hi, I've downloaded and edited a lot of images. Currently I have about 70k face ima |
2017-10-14 09:06:05 -0600 | answered a question | Java Maven Deployment If anyone is still concerning the same issues like I had, try this Maven dependency which allows a multi-platform soluti |
2017-09-27 14:30:43 -0600 | asked a question | Java Maven Deployment Java Maven Deployment Hi, I would like to deploy my javafx project with all dependencies, so that the client do not nee |
2017-05-30 15:22:00 -0600 | commented question | Purpose of trained xml file Ok, I know that. What I really mean is: What's the model containing? I mean what do all these xml-elements stand for? And how does it help to classify inputs? |
2017-05-30 05:44:57 -0600 | asked a question | Purpose of trained xml file Hi, I'm dealing with machine learning / deep learning and read a lot about it (how it works, kinds of net structures, kinds of learnings, etc) and read the paper from Paul Viola and Michael Jones whose method is used in OpenCV. But I just couldn't find out what the purpose of the *.xml file is, produced by the OpenCV training. It contains a lot of training information in the header and, it seems so to me, a lot of random points. The xml file contains a lot of weak classifiers which are combined to become a strong classifier. My question, however, is: How does OpenCV use this *.xml file to detect objects? What are the internal leafs and what's meant by "leaf values"? I'd appreciate any helpful answer :) |
2017-03-20 06:40:53 -0600 | commented answer | copyTo not working: Java Hey, thanks for your answer. What about if I want to put some random pixels (or modify the pixels with an algorithm that's not within org.opencv.Core*)? |
2017-03-19 18:09:14 -0600 | commented question | copyTo not working: Java Why downvoting wihtout comment? This isn't helping anyone .. |
2017-03-19 13:58:42 -0600 | asked a question | copyTo not working: Java Hi, I'm retrieving a ROI of mat, want to manipulate its values and put the manipulated matrix back into the original matrix but it's not working, though.. I googled that result together as it seems to be the best documentation, but I'm stuck and don't know why the original matrix won't hold the new values. The code is as follows. where objectArray contains Rectangles, my ROIs and frame is my original Matrix, which is, of course, bigger than A. Can someone help me? Edit: It's working on every webpage i see. In my case, nothing happens. The rectangular is drawn but thats it. Actually the RIO Image should appear darker, but it doesn't. When I try then the original image/mat has the same size as my ROI, what's definitely not wanted. I also tried applying a mask with the same size as my Matrix 'A', but the image was turned completely black afterwards. Seems like I'm running from one pitfall straight into the other. Would appreciate some help. |
2017-03-14 14:50:04 -0600 | commented question | Createsamples.exe: Error Code -9 Still not working. Why is opencv even that crap and undocumented? Because it's "open source" (yes, in quotes)? I'm delighted.. |
2017-03-11 20:03:21 -0600 | commented question | Createsamples.exe: Error Code -9 Thanks for the answer. So let's break this down a bit. The data specified in the annotation text file is "C:\Users\myUsername\Pictures\positive\9336923.1.jpg 1 47 18 121 155". How could the bounding box be outside of the image? So it's obviously that the backslash is the reason. How could I change this now, afterwards? Usually, Windows uses a single backslash as path separator (or escape in programming), but reading from a file won't be a problem for Java, e.g. What about the dot (not for extension) ? Is that a problem, too? |
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2017-03-11 08:50:02 -0600 | commented answer | opencv_createsamples doesn't create samples I did annotate around 3k images and stored them in file.txt using the specified tool. Running createsamples results now in an error: I opened another issue for that: link text |
2017-03-10 15:34:14 -0600 | asked a question | Createsamples.exe: Error Code -9 Hi there, as I finished creating my info.txt file containg the absolute paths to the images and the rectangle information of my desired objects to be detected, I just ran Unfortunaley I get an error code -9, saying:
Anyone knows what's that about? Further it says it's not able to open my image, which is in a .jpg format. The funny thing is, that the specified location (C:\build\master_winpack-build-win64-vc14....) doesn't even exist. Not even in the opencv-folder. So is this a mess by opencv (like bad handling of paths)? I'd be glad about some help. As always, the documentation of opencv doesn't give me any hint about what to do. |
2017-03-04 05:01:30 -0600 | commented answer | Resume annotation tool Thank you, that should be a possible approach. Didn't think in this way. |
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2017-03-03 19:45:42 -0600 | asked a question | Resume annotation tool Hi, as I got around 6k positive images, is there a possibility to resume the annotation tool? like started where i quit the last time and continue annotating the images? It'd take hours to finish this job... Thanks in advance. |
2017-02-27 15:22:51 -0600 | commented question | Train own HOG I see it's for python. I need to use Java tho.. openCV seems to be the only possibility tho... I think I need to expand my knowledge in neural nets if I wanted to train my own SVM, it seems. Unluckily the method names and parameters of opencv SVM aren't chosen happily, but well, I got some research going on. |
2017-02-25 11:54:58 -0600 | commented question | Train own HOG Thanks for that hint! When searching on the web for HOGDescriptor, I just get results of some C++ code, but no openCV library tool that generates a data file of the result. When training my own haar and lbp cascades (as the face detection is not so good with the standard XML-Files), the result was pretty disappointing as it detected several other objects than faces (legs, feet, bottles, ..). I expect HOG to give a better result, right? Do you maybe have a good link for what I'm looking for? (how to use the HOGDescriptor properly) |
2017-02-25 09:51:34 -0600 | asked a question | Train own HOG Hi, how to train a HOG in openCV? As I understood it correctly, it's just, besides Haar and LBP, another algorithm that can be used for face detection (and recognitiion). I want to achieve the first, so only face detection. I got around 5000 positive samples and 3000 negative samples. As I can't find any explanation of how to train a hog, how to generate a SVM and such, I thought I could ask some professionals in here, as the openCV docs is the worst documentation I ever met (I can't win any useable information from there doc, especially when it's about implementation docs like for Java). So, the concrete questions are:
I'd appreciate some answers :) Last but not least: I know it's a pretty awkward place to ask, but: isn't there another, better (documented, more efficient, more explained, more intuitive) library for detecing and tracking faces (in Java or Python)? |
2017-02-24 15:45:48 -0600 | commented question | Get values of a Mat object I'd like to extract "image" (pixel...) values from certain spots of my images to manipulate and store them in a database. After that, I want to replace the old values by the new calculated values and convert the Mat object to a javafx Image again. Yea the thing with pixel. I realized fighting the opencv dev's will mostly goes a bad way. |
2017-02-24 13:54:33 -0600 | asked a question | Get values of a Mat object Hi guys, I'm pretty stuck right now. My goal is the following one: JavaFX Image -> Mat -> byte values So I already made it to convert the image to a openCV mat, but I'm confused about the getter and setter methods of the Mat object. I mean, at a specific row and column, let' say X=30 and Y=20, I would get a array back, in all cases, for one value? Like this: Why should I even consider to do this? And what's the point behind the getter method "mat.get(int col, int row, byte[] array)? I mean, what's that byte doing there? Anyways, I want to manipulate specific mat values and I need a byte representation of each value. How would you do this? I appreciate any help :) |
2017-02-01 20:01:04 -0600 | asked a question | opencv_createsamples doesn't create samples Hi, i'm pretty new to openCV and I need it for an university project. As I couldn't found any proper classifier that is capable of detecting side-way faces, I wanted to create my own classifier. What I've already done:
And thats the problem. No samples are generated. I've read several tutorials but it seems like I don't get it. Do I need to get a info file? Do I need to draw rectangles around the objects in my positive images? I have like 1500 positive and 800 negative images. The thing is that the script runs without any error but not even a single sample file is created. What do I miss? I couldn't find any answer out there.. hope anyone of you can help me! Thanks in advance. Info: I'm on Linux Mint 18. The output is similar to: The field 'Num: 0' is a needle in my eye, as Info file name: (NULL). Could this occur the problem that no samples are generated? What about the script 'createtrainsamples.pl' you can find at github? I mean I want to generate samples for the training. Am I actually using the right script? I'm desperate.. |