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option to perspective-warp the input image before motion-detection #153

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option to perspective-warp the input image before motion-detection #153

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2463295
use left/right arrow keys to move between images in the webserver int…
jeremybmerrill Nov 8, 2023
a81b93f
warp image, optionally
jeremybmerrill Nov 8, 2023
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warp image, optionally
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@jeremybmerrill
jeremybmerrill committed Nov 8, 2023
commit a81b93fc6e3842745b82b190c5dcdc770ae06e23
4 changes: 4 additions & 0 deletions config.py
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Original file line number Diff line number Diff line change
Expand Up @@ -109,6 +109,10 @@
MO_CROP_X_RIGHT = 250 # Default=250
MO_CROP_Y_UPPER = 90 # Default=90
MO_CROP_Y_LOWER = 150 # Default=150
MO_WARP_ON = False # Default False; cv2.warpPerspective using 4+ control points defined below.
# on my 4gb Rpi 4, this costs ~0.17 fps
MO_WARP_INPUT_PTS = [[188,345], [179,411], [489,436], [489,363]]
MO_WARP_OUTPUT_PTS = [[179,363],[179,436], [489,436], [489,363]]

# Plugins override the specified config.py variable settings
# ----------------------------------------------------------
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9 changes: 9 additions & 0 deletions speed-cam.py
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Original file line number Diff line number Diff line change
Expand Up @@ -118,6 +118,9 @@
"MO_CROP_X_RIGHT": 250,
"MO_CROP_Y_UPPER": 90,
"MO_CROP_Y_LOWER": 150,
"MO_WARP_ON": False,
"MO_WARP_INPUT_PTS": [1,2,3,4],
"MO_WARP_OUTPUT_PTS": [1,2,3,4],
"CAMERA": "pilibcam",
"CAM_LOCATION": "Front Window",
"USBCAM_SRC": 0,
Expand Down Expand Up @@ -1151,6 +1154,9 @@ def get_motion_contours(grayimage1):
image = vs.read() # Read image data from video steam thread instance
# crop image to motion tracking area only
try:
if MO_WARP_ON:
M = cv2.getPerspectiveTransform(np.float32(MO_WARP_INPUT_PTS),np.float32(MO_WARP_OUTPUT_PTS))
image = cv2.warpPerspective(image,M,(image.shape[1], image.shape[0]),flags=cv2.INTER_NEAREST)
image_crop = image[MO_CROP_Y_UPPER:MO_CROP_Y_LOWER, MO_CROP_X_LEFT:MO_CROP_X_RIGHT]
image_ok = True
except (ValueError, TypeError):
Expand Down Expand Up @@ -1302,6 +1308,9 @@ def speed_camera():
# initialize a cropped grayimage1 image
image2 = vs.read() # Get image from VideoSteam thread instance
try:
if MO_WARP_ON:
M = cv2.getPerspectiveTransform(np.float32(MO_WARP_INPUT_PTS), np.float32(MO_WARP_OUTPUT_PTS))
image2 = cv2.warpPerspective(image2,M,(image2.shape[1], image2.shape[0]),flags=cv2.INTER_NEAREST)
# crop image to motion tracking area only
image_crop = image2[MO_CROP_Y_UPPER:MO_CROP_Y_LOWER, MO_CROP_X_LEFT:MO_CROP_X_RIGHT]
except:
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