OpenCV Tips

Infrequent tips on OpenCV.

[OpenCV Tips @OpenCVTip]

An example usage of parallel_for_() that paints an image to random colors in parallel:
https://t.co/9Gdz0mMpJd

[OpenCV Tips @OpenCVTip]

You can use parallel_for_() to easily parallelize your data processing loops.

[OpenCV Tips @OpenCVTip]

You can initialize/seed RNGs using `state` field.
e.g. theRNG().state = getTickCount();

[OpenCV Tips @OpenCVTip]

You can use theRNG() to access default, thread local random number generator.
e.g. float x = theRNG();

[OpenCV Tips @OpenCVTip]

There is an undocumented TickMeter class to measure elapsed time.

[OpenCV Tips @OpenCVTip]

OpenCV announces VTK-based 3D visualization module: viz
demo: https://t.co/JRTPmrqNHx
docs: http://t.co/PeC6qT9OFt

[OpenCV Tips @OpenCVTip]

Using OpenCV Java with Eclipse http://t.co/O47Onf3Mrq

[opencv @opencvlibrary]

OpenCV Development Team worked hard in scorching summer heat and has prepared the OpenCV 2.4.6 release for you! http://t.co/VIXpvimeMw

[OpenCV Tips @OpenCVTip]

Sorry, this time it is not about OpenCV, it is about my home country, Turkey. http://t.co/an5BAQ60BB

[opencv @opencvlibrary]

Microsoft released Image Watch, a free Visual Studio extension for viewing in-memory OpenCV images during debugging: http://t.co/okaLYZaWmg

[OpenCV Tips @OpenCVTip]

[tutorial] How to build OpenCV library and debug it in VS2010?
http://t.co/ax0JjyeF

[opencv @opencvlibrary]

Try out the beta version of OpenCV 2.4.4. The final 2.4.4 is expected within ~2 weeks. http://t.co/qFoNryKN

[OpenCV Tips @OpenCVTip]

e.g. rectangle(img, rect, CV_RGB(255,0,0)); // draws a red rectangle.

[OpenCV Tips @OpenCVTip]

As drawing function color parameters, use CV_RGB() macro for clarity instead of Scalar().

[Одна інтеллектуальна одиниця @cvtalks]

A new cv::putText to print text on image in the same way as you print "Hello world!" to std::cout.http://t.co/B2ANh392

[OpenCV Tips @OpenCVTip]

You can find the code to produce the image in previous tweet here: http://t.co/MsxJ5L9W

[OpenCV Tips @OpenCVTip]

Here you can see how all the available fonts in OpenCV 2.4.3 appear: http://t.co/KC6EJNUv

[OpenCV Tips @OpenCVTip]

...Use getTextSize() for that purpose. http://t.co/ALFEUCvM

[OpenCV Tips @OpenCVTip]

You need to know the text size in order to position the text or create an image that's big enough to contain the text...

[OpenCV Tips @OpenCVTip]

To write text on an image use putText() http://t.co/45P9gx13