How to create and select a Region of Interest and also to create a line inside a deepstream app?

Accelerated Computing Intelligent Video Analytics DeepStream SDK
#1

How to create and select a Region of Interest (eg a 5 sided polygon to only analyse that area leaving the rest aside) and also to create a line (eg to perform line count etc) inside a deepstream app?

Any idea on the same along with some code snippets can help.

#2

why the rectangle detection can’t meet your requirement?
And according to what to draw 5 sided polygon?

#3

Hello ChrisDing,

can you please explain how to do a rectangle-based ROI detection? I cannot find any examples, any help would be really appreciated.

Thanks

#4

Hi gsdeepaksh,

Is this still an issue at your sides?

Hi robert.varkonyi,

Please refer to this thread if can help: https://devtalk.nvidia.com/default/topic/1063259/deepstream-sdk/i-m-not-sure-how-to-specify-the-coordinates-of-a-specific-area-roi-in-deepstream-app-/post/5384697/#5384697
If not, please file a new topic instead.

Thanks

#5

I think you have to modify the nvinfer code to crop ROI (rectangle) and do some padding (for polygon) and then push to input queue.

nvinfer diagram is here:
https://devtalk.nvidia.com/default/topic/1061492/deepstream-sdk/deepstream-sdk-faq/

#6

Reference code: https://devtalk.nvidia.com/default/topic/1067010/deepstream-sdk/roi-for-source-video-in-deepstream-app/post/5404543/#5404543

#7