Is there a danger with using the same Mat object for both source and destination?

java

asked 2014-03-23 22:06:01 -0600

paulgfrey
11 ●1

updated 2014-03-24 01:59:52 -0600

berak
32993 ●7 ●81 ●312

I'm using the OpenCV library for a Java project. Although this question probably really isn't specific to Java. Many of the OpenCV methods I'm using in my application like Imgproc.threshold() and Imgproc.equalize() all have a source and destination Mat as their parameters. I'm using the same object for both the source and destination and the application is working properly. Is there a danger to using the same object for both the source and destination Mat?

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answered 2014-03-24 02:09:03 -0600

Martin Peris
1742 ●10 ●23 http://blog.martinperi...

Hi there,

There is OpenCV methods for which is safe to use the same source and destination images, but you should check the documentation and make sure that you know what you are doing.

When in doubt, use separate images. IMHO it is always better to use a bit more of memory than to deal with unexpected behaviors.