Assertion in Stitching_detailed.cpp Timelapse range_width [closed]

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Hi,

I try sampleopencv\samples\cpp\stitching_detailed.cpp with tow or three images. Whe I run program I have got an exception:

OpenCV Error: Assertion failed (timelapse) in main, file ......\samples\cpp\stitching_detailed.cpp, line 818

Now line 817 is

else if (!timelapser)

If I change in

else if (timelapser)

No exception and a beautiful result in result.jpg. Is it similar when you run this sample?

I think it was right but that's not.

My problem now is parameter range_width in --timelapse (as_is|crop) (range_width).

I think timelapse was something like that (it's only an example I have never used this software).

What's meaning of rang_width?