use pi camera for detection on raspberry pi 4

[aminatamima]

Hello could someone help on how i can use the project to detect from a pi camera ? Please
Thank you

[aminatamima]

Could someone help please ?

[josilvacastillo]

with darknet original repo:
./darknet detector demo cfg/coco.data cfg/yolov3-tiny.cfg yolov3-tiny.weights

in this repo you should build darknet before with opencv=1 in Makefile (install opencv before)
make clean
make
i did this before, the cámera works, but the detector don't works.

[aminatamima]

I meant with raspberry pi-caméra, this command doesnt work.

But i found and tested this link http://funofdiy.blogspot.com/2018/08/deep-learning-with-raspberry-pi-real.html with a python script for pi-cam live detection.
It works but without opencv =1 :( . got error opencv not found even if i have opencv well installed

[josilvacastillo]

i tested that branch and its nice, the python script display the predictions.png image in a loop.
when opencv=0 its create a predictions.png but its not display. i think that the problem is in the version of opencv, its need "python-opencv" from apt, but im build from source the 3.4.6 version

[Alexismichel]

If I take a picture with raspberry camera and execute
./darknet detector test cfg/coco.data cfg/yolov3-tiny.cfg yolov3-tiny.weights data/my_picture.jpg,
the program detect well.
If I try detect on live video, ./darknet detector demo cfg/coco.data cfg/yolov3-tiny.cfg yolov3-tiny.weights, there is no detection...
@josilvacastillo have you found any solution to get the nnpack-darknet working on raspberry pi 4 ?

[smallworld-network-wupeng]

If I take a picture with raspberry camera and execute
./darknet detector test cfg/coco.data cfg/yolov3-tiny.cfg yolov3-tiny.weights data/my_picture.jpg,
the program detect well.
If I try detect on live video, ./darknet detector demo cfg/coco.data cfg/yolov3-tiny.cfg yolov3-tiny.weights, there is no detection...
@josilvacastillo have you found any solution to get the nnpack-darknet working on raspberry pi 4 ?

I have same problem ,this looks very weird

[Jaswar]

Hello,
Has anyone been able to solve the problem of not having any detections when using ./darknet detector demo?

[whgsh]

same problem here...using ./darknet detector demo, no detection