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Is it a bug? After imread cv crashes in mat.inl.hpp

When I try to open non existing file using imread it will crash Unhandled exception at 0x00411c78 in ...exe ... 0xC00000 5 Access violation writing at location 0x00419257 mat.inl.hpp on line #681...

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Calculate affine transformation matrix

I want to build a function that can estimate geometric transform i.e calculate the transformation matrix required to convert first image into second image. So my second image is obtained in two steps,...

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I have to find the homography that best warps the images into the same...

I have used RANSAC algorithm to find the homography and wrap perspective operation to apply it to an image. here is the code MIN_MATCH_COUNT = 10 img1 = cv2.imread('bus1.jpg',0) img2 =...

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error LNK2019: unresolved external symbol "class cv::Mat __cdecl result(void)"

i am trying to make this code work, but i cannot solve that error Error 1 error LNK2019: unresolved external symbol "class cv::Mat __cdecl result(void)" (?result@@YA?AVMat@cv@@XZ) referenced in...

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Bilateral filter error, Assertion failed ((src.type() == CV_8UC1 ||...

My code is shown in the following: Bitmap b = BitmapFactory.decodeResource(getResources(), R.drawable.image1); int width = b.getWidth(); int height = b.getHeight(); Mat tmp = new Mat (width, height,...

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Compute stereo remapped points without applying cv::remap to whole image.

I can compute the same feature's coordinate in left and right stereo image ,please suggest a faster way to compute these points in location in stereo calibrated image without applying cv::remap to...

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How to evaluate light linearity and additivity with a camera

Hi, lastly I am questioning the linearity and additivity of light propagation in images. As the title says I would like to see what is the contribution of light to image pixel intensity values and if...

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Surf and FlannIndex to find image in images database

Hi there, I'm new to opencv and using EMGU as wrapper in C#. I'm trying to get the best similar image for a query image from images database. I followed up the example as show...

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Creating custom kernels

I want to create custom filters using filter2d function but most of the examples I see use custom methods like ones,zeros and eye but I want to create a 3x3 matrix which contains the values I want....

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Hough clustering and sparse matrices

Hi, I would like to implement Hough clustering method described in this [paper](http://conf-scoop.org/IWIP-2014/4.V.Seib_IWIP.pdf). The whole idea is can be summarized in following way. 1. Do typical...

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Opencv not working in AWS EC2 instance

I have created a python flask application and it is hosted in AWS EC2 instance. I used apache2 for run it. My application is working fine but when I add opencv for it I got the below warning....

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Figure out location of computer screen in world coordinates

I'm using OpenCV and have a ray as a vector in world coordinates. I want to figure out the point in world coordinates where this ray intersects my computer screen. How do I figure out the location of...

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A Problem with Stitch

Recently, I'm working with opencv Stitch class. I try to use some sample code from opencv's stitch class. I also try to use some code from internet. They all seem to be very easy to understand. But the...

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Why OpenCV4Android VideoCapture cannot open filename in android

I am new to Opencv4Android, now I want to use android to open a file from android device by filename, The codes are like below: VideoCapture cap; cap.open("/mnt/sdcard/DCIM/Camera/demo.mp4"); I found...

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PYTHON 2.7 PROCESSES HANGING AT OPENCV 3.0 FUNCTION

Dear All, I've been using a Python/OpenCV/Raspberry Pi 3 and a Pi Camera to recognise hundreds of white squares in each frame. In an attempt to get the frame rate a bit higher than 8 FPS I tried...

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How can I skewed character in license plate exactly?

I try many way to skewed the image but not exactly at all. Can you help me? Thanks [C:\fakepath\Capture.PNG](/upfiles/14657292718849103.png)

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Documentatio for neural networks in OpencV 3.0 +

Hello, OpenCV forums. I've been looking for documentation and/or plain examples of using the Machine Learning libraries of OpenC 3.1.0, but most of what I've found is 2.4 related and the names of...

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How can I translate Matlab code to opencv to align image?

Here is Matlab: http://stackoverflow.com/questions/5770818/how-to-align-image-matlab

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Where to get Nonfree modules?

I found tutorials using Feature detection. One of the tutorials includes these features: opencv2/features2d/features2d.hpp opencv2/nonfree/features2d.hpp opencv2/nonfree/nonfree.hpp I did not found the...

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Problems with rectified pictures for stereo vision

I m trying to do stereo matching but it doesnt work well until now. I determined the "tvecs" and "rvecs" for each camera. So i can use these relationships to get the translation vector and rotation...

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