Why Stitcher module don't use TBB (@OpenCV 243+TBB)

nikkadim
1 ●2

I have OpenCV 2.43 compiled with TBB support: image description but when I run simple code

[..]
Stitcher stitcher = Stitcher::createDefault(true);
Stitcher::Status status = stitcher.stitch(imgs, pano);
[..]

for large images, I can see load only one core of 8 (@Core i7). Why?

1 answer

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Only some parts of Matcher class are paralleled with TBB. You path true to Stitcher::createDefault() factory, it means that some parts of algorithm will work on GPU. So, in many cases you do not see usage of multiple CPU cores.
OpenCV is open source project and you can contribute your optimizations. The best way for it is pull request via Github.