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2014-10-06 03:00:01 -0600 | asked a question | Extract foreground using grabcut I am using grabcut algorithm in order to extract background-foreground of an image. I want to extract the calculated grabcut mask in order to keep only the background of the image. How can I do so? How can I extract only the calculated pixels from my image? I use the following c++ code: |
2014-10-03 08:20:35 -0600 | asked a question | Grab_cut implementation using a specific mask I want to perform grab_cut using my one created_mask. I found python code which cam be found :http://docs.opencv.org/trunk/doc/py_tutorials/py_imgproc/py_grabcut/py_grabcut.html . What I what is to perform grab_cut by given my own mask. How is it possible to give as an mask input a bounding box of image? |
2014-10-01 09:50:42 -0600 | commented answer | opencv_highgui249.lib(opencv_highgui249.dll) : fatal error LNK1112 In the fifth step 5.In the Type or select the new platform drop-down list, select a 64-bit platform. the dropdown menu is empty. |
2014-10-01 09:47:18 -0600 | commented answer | opencv_highgui249.lib(opencv_highgui249.dll) : fatal error LNK1112 When I am trying to create new configuration with x64 variable in dropdown menu only contains win32 thus I ve got to create it. But in the field copy setting for only contains win32 option. |
2014-10-01 08:27:18 -0600 | asked a question | opencv_highgui249.lib(opencv_highgui249.dll) : fatal error LNK1112 I am trying to compile a simple opencv project from windows 7 64 bit OS. I am facing the following error: opencv_highgui249.lib(opencv_highgui249.dll) : fatal error LNK1112: module machine type 'x64' conflicts with target machine type 'X86' In project properties , in Linker I put additional Library dependencies: E:...\opencv\build\x64\vc10\lib; and add all necessary libs in input-> Additional Dependencies. However, I ve got the avobe error. |
2014-03-18 04:04:10 -0600 | asked a question | Features extraction with orb I am using opencv class orb for feature extraction. As I see for every input image it gives several interest points as a feature vector. However, I ve got a database of images and I want to calculate the feature vector of all these images for classification purposes. I am wandering how is it possible to create to sample all these interest points in a fix size. Am I supposed to create a visual codebook of images? |
2014-02-24 04:08:58 -0600 | commented question | Store mat data in txt Yea, thanks int casting works! |
2014-02-24 03:55:40 -0600 | commented question | Store mat data in txt h < E ^ W r ; C 9 1 6 7 4 % m b ¦ ¦ † ‹ J k ] < ( / O * C ¬ Ζ Ξ Τ Μ Ή ‚ \ V B L D - 0 / ' Ε ά Τ Ψ Υ Ι Ά ‚ \ B V < 4 ? ; | Ξ Σ ά Ω Ϊ Ϊ Ρ Ζ ± d B > F 6 A ¨ „ d Τ ή ά Ϊ Χ Υ Δ ± 2 H L 9 Q ³ r p † ² Χ Ψ ‹ X } p ? a 2 V • ~ Σ Ε Ύ 3 ( « n – ‰ |
2014-02-24 03:54:22 -0600 | commented question | Store mat data in txt Ok know it works without exceptions, but in the txt file, weird characters it is stored. |
2014-02-24 03:49:21 -0600 | commented question | Store mat data in txt I am trying to figure out what is the type of my Mat file. I ve just used mage = imread(filename, 0); to read the file, where filename is a .jpg file. |
2014-02-24 03:38:48 -0600 | asked a question | Store mat data in txt I am trying to write a mat file to txt file. I am using the above function to do so: void writeMatToFile(cv::Mat& m, const char* filename){ } And the main code: However I am receiving unhandled exceptions. Any idea how can i store mat data in txt? |
2014-02-21 09:11:49 -0600 | asked a question | GrabCut operation mode I am trying to use opencv's grabCut implementation for foreground extraction in an image. When I am using operation mode GC_INIT_WITH_MASK, I ve got no prob running the algorithm in a database of images. However, when I am using operation mode GC_INIT_WITH_RECT program crashed during running process in specific images. What is the possible explanation for this? |
2014-01-13 04:50:44 -0600 | commented question | FaceRecognizer returns always the same label Saving the model is working fine!! |
2014-01-13 04:49:55 -0600 | commented question | FaceRecognizer returns always the same label In matlab implementation, I divide the pixels with 255 so as to normalize them to 0-1. Basically it seems that my problem stands with h-s-v value channel. When I use the simple rgb it works. My question now: if it is necessary here to reshape the image from matrix to be a vector 1xn in train process. |
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2014-01-13 03:15:30 -0600 | asked a question | FaceRecognizer returns always the same label I am having problems using opencv's face recognitzer algorithm. I am training my model using images of 5 different persons. In predict process I am always receiving as predicted label the same label 1. The images I am using for training are cropped and aligned(black n white) of the persons. My code for training: (V channel from hsv colormap) My code for predict: I am guessing that I am missing a classic mistake here. What is the usual reasons when recognizer stuck in the same label? I push_back images in vector images with their initial size. Do I have to reshape them as vectors before the training process??? Do I have to randomize the order of the train images? Does it have some meaning for the training process?? EDIT: I ve discovered that .yml file contains zeros inside. So the train process is totally wrong. Is it necessary to normalize the values of the pixel? Is it possible that the arising problems is due to lack of normalization?? |
2014-01-08 16:58:54 -0600 | commented answer | Converting a rgb image to hsv and to grayscale How can I keep the V channel. Is the third dimension of the mat file?? |
2014-01-08 09:58:05 -0600 | asked a question | Converting a rgb image to hsv and to grayscale I am working with a face recognition task. I am reading an rgb image and trying to convert it to hsv as I am trying to see if hsv is better for illumination issues. I am trying to understand if there is a really difference between converting an rgb image to bgr_gray and rgb to bgr_gray. In fact when I plot cropped_hsv I ve got a weird result is not the same with rgb_gray image. Is this the final hsv_gray I want?? |
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2013-12-16 07:12:16 -0600 | commented question | Return confidence factor from detectMultiScale I ll take a closer look, thanks anyway!! |
2013-12-16 05:25:35 -0600 | commented question | Return confidence factor from detectMultiScale I ve just have to calculate output y (viola-jones) using the weights from the xml file? Or I ve got to rebuilt opencv in order to keep track of the calculated weights?? |
2013-12-16 03:51:09 -0600 | asked a question | Return confidence factor from detectMultiScale I am using haarcascade_frontalface detector, for a face detection system. I am trying to find way to return a confidence factor for the detection process. From the parameters of the function I cant locate something about confidence factor. What I ve got to do? |