You can use this code to measures the distance from object to camera using single camera π· .
I have detect a face in the frame and estimated a distance using the width of face.
Distance.and.Speed.Estimation.Demo.mp4
Distance Estimation Youtube Tutorail
Distance & Speed Estimation Youtube Tutorial
βοΈ I have included Speed Estimation code is well check that out.
βοΈ I have include Distance estimation of multiple objects using Yolo V4 Object Detector Opencv-python
git clone https://github.com/Asadullah-Dal17/Distance_measurement_using_single_camera
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Windows
pip install opencv-python
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install Opencv-python on Linux or Mac
pip3 install opencv-python
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windows: π
python distance.py
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python Updated_distance.py
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linux or Mac π
python3 distance.py
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python3 Updated_distance.py
# focal length finder function
def focal_length(measured_distance, real_width, width_in_rf_image):
focal_length_value = (width_in_rf_image * measured_distance) / real_width
#return focal length.
return focal_length_value
The Focal Length finder Function Tacks Three Arguments:
measured_distance
It is distance which we have measured while capturing reference image:straightruler:. **_From object to Camera** which is Known_distance = 72.2 #centimeter
real_width
Its measure with width of object in real world, here i measure the width of face in real world which was Known_width =14.3 #centimeter
width_in_rf_image
it width of object in the image/frame it will be in pixels
# distance estimation function
def distance_finder(focal_length, real_face_width, face_width_in_frame):
distance = (real_face_width * focal_length)/face_width_in_frame
return distance
This Funciton Taks Three Argument,
Focal_Length
it is focal length, out of FocalLength finder function.
real_face_width
Its measure width of object in real world, here i measure the width of face in real world which was Known_width =14.3 #centimeter
face_width_in_frame
width of face in the frame, unit will pixels here.
I have also create Face Following Robot which use distance Estimation, if you are interested you can Watch my Youtube Video
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