Line detection method
Hi Guys, I'm trying to do some project to detect um object in microscope. I'm using OpenCV for some time, but I dont underestand everything... Goal is: 1. with movable cursor find centre line of two...
View ArticleAdding Noise to Image - Opencv
Hi everyone! I'm trying to to add noise to an Image & then Denoise it to test my DeNoising algorithm! So for benchmark i'm referring this [Online Test samples][1]. I'm trying to replicate the...
View ArticleSave list of elements into an image without pixel distortion
- I'm doing a **c#-EmguCV** project related to invisible image watermarking. - Is there any OpenCV function / combination of functions to save a map of elements like [{a,b},{b,d},{r.g}........{t,j}]...
View Articlehow to install Opencv on Ubuntu
First : linaro@linaro-nano:~$ sudo apt-get install libfontconfig1-dev libxft-dev libfreetype6=2.5.2-1ubuntu2 libfontconfig1-dev libcairo2-dev libpango1.0-dev libgtk2.0-dev libopencv-objdetect-dev...
View ArticleSave a list of elements inside an image in c#
I'm looking a way to save information like a relationship between neighborhood pixel values in an image. Is there anyway to save a list of elements/linked list inside an image? Please suggest some...
View Articleincrease bit depth of image using c#
I am doing a project in digital image watermarking. In that project, I'm looking for a way to increase bit depth of an image for store additional information in each pixel. I'm using C# and OpenCV.
View ArticleStitching Images with SIFT Features
I am trying to create an image stitcher that uses SIFT features, but it appears that I cannot use SIFT with the OpenCV Stitcher class. I have already created a method of finding SIFT features and...
View ArticleColor recognition with OpenCV for Android
I am trying the make an app that recognizes it white is on screen. I have written code that take an RGBA mat and converts it to a one pixel gray mat. I am trying to see the value of the grayPixel so I...
View ArticleThe java system library do not load opencv library
I'm using the opencv library in a java project. I have a simple java project that compiles as a 'jar', and manually adding the opencv library, then, I know that I have to put this code after...
View Articlesome functions not available
I'd like to use fisherfaces but currently these funcs are not available; I did a clean cv2 v3.0 install and cmake like so:> cmake -DWITH_QT=ON -DWITH_OPENGL=ON> -DWITH_VTK=ON -DWITH_TBB=ON...
View ArticleWhere can I look for algorithms
Hi, I am looking for 3 algorithms to correct images 1. KeyStone effect 2. Tilted objects ( 3. Rotated objects Where should I look in OpenCV.
View ArticleRe-sizing a perspective transformation
Hello forum, I have a Homography Matrix that was computed from 2 static videos ( Video A and Top View ) both with a resolution of 1920 x 1080. I would like to increase the speed so I have resized Video...
View ArticleFace detection: how to stop detecting multiple mouths in real time OpenCV Java
I'm writing a java program using OpenCV that opens the webcam and detects the face, eyes and mouth in real time. Everything works fine except for the mouth detection as it seems to be detecting many...
View ArticlecalcHist() usage for RGB histogram...?
The code: int imgCount = 1; int dims = 3; const int sizes[] = {256,256,256}; const int channels[] = {0,1,2}; float* rRange = {0,256}; float* gRange = {0,256}; float* bRange = {0,256}; const float...
View ArticleOpenCV 3.0 Filters missing
As in the subject. I am migrating to OpenCV 3.0 and now I want to use following: -> BaseFilter -> BaseRowFilter -> BaseColumnFilter -> FilterEngine -> getKernelType I cannot use them...
View ArticleWhy is there a difference between OpenCV's scale change implementation of...
I know the gist of how detectMultiScale in OpenCV works i.e. you have an image and a detection window; the image is scanned by a detection window and particular feature calculations are done on the...
View ArticleHow to fix opencv java library making in debian?
I am trying to buld java libraries of opencv 3 on debian 7 using make -j8 the following occures [ 46%] Building CXX object modules/videoio/CMakeFiles/opencv_videoio.dir/src/cap_dc1394_v2.cpp.o [ 46%]...
View Articlesending opencv frames through udp socket python
I worte these code for a video chat app I am trying to make. When i receive the frames...they repeat themselves with a a certain amount of lag. **The problem can be be best understood if u run the...
View ArticlePython import cv error on OpenCV 3.0.0 (no error for import cv2)
I am using a Windows 10 machine with Python 2.7.x and OpenCV 3.0.0 installed and both work fine. I followed the [official...
View ArticleHow can I draw rectangle with MatOfKeyPoint for Text Detection | Java
Hi guys, I' ve been working on real time text detection and recognition with OpenCV4Android. Recognition part is totally completed. However, I have to ask question about text detection. I' m using the...
View Article