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2017-07-30 06:03:29 -0500 commented answer Transposing movement points between a perspective camera and a mercator (isomorphic) map view

Did you figure this out? I am facing with similar problem

2017-07-27 06:11:19 -0500 commented answer crop image to itself c++

Hi , thank you for your reply

I want to save the copy by value that happed when we using .clone() or .copyTo

When I using large images it could be inefficient time consuming

2017-07-27 01:39:18 -0500 asked a question crop image to itself c++


When I crop image to itself do I need the .clone() function?

I mean:

Mat image = imread("somePath.bmp");

What is the right way to crop it?

image = image(rect(0,0,10,10)).clone();

or I can save the clone() and write

image = image(rect(0,0,10,10));

Thanks to all the helpers

2017-04-20 03:51:21 -0500 asked a question VideoWriter compress level control


There is any way to control the compression using VideoWriter?

I know there is lossless codecs like CV_FOURCC('H', 'F', 'Y', 'U');

But i want to use compress codec like CV_FOURCC('M', 'J', 'P', 'G') and control its compress level.

Is it possible to know codec's compress level?

Im using Linux ubuntu 16.04 and OpenCV 2.4.13

Thanks in advance