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Set exposure in the main loop and at every frame

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This commit is contained in:
Szymon Acedański 2019-03-11 23:30:31 +01:00
parent 0c4992ffaf
commit f1678de324
2 changed files with 20 additions and 18 deletions
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19
src/cli/test.py
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@ -37,16 +37,8 @@ if fw != -1:
if fh != -1:
video_capture.set(cv2.CAP_PROP_FRAME_HEIGHT, fh)
# Disable autoexposure
# Read exposure from config to use in the main loop
exposure = config.getint("video", "exposure", fallback=-1)
if exposure != -1:
# For a strange reason on some cameras (e.g. Lenoxo X1E)
# setting manual exposure works only after a couple frames
# are captured.
for i in range(6):
video_capture.grab()
video_capture.set(cv2.CAP_PROP_AUTO_EXPOSURE, 1.0) # 1 = Manual
video_capture.set(cv2.CAP_PROP_EXPOSURE, 167.0)
# Let the user know what's up
print("""
@ -204,6 +196,15 @@ try:
if slow_mode:
time.sleep(.5 - frame_time)
if exposure != -1:
# For a strange reason on some cameras (e.g. Lenoxo X1E)
# setting manual exposure works only after a couple frames
# are captured and even after a delay it does not
# always work. Setting exposure at every frame is
# reliable though.
video_capture.set(cv2.CAP_PROP_AUTO_EXPOSURE, 1.0) # 1 = Manual
video_capture.set(cv2.CAP_PROP_EXPOSURE, float(exposure))
# On ctrl+C
except KeyboardInterrupt:
# Let the user know we're stopping

19
src/compare.py
View file

@ -144,16 +144,8 @@ if fh != -1:
# This will let the camera adjust its light levels while we're importing for faster scanning
video_capture.grab()
# Disable autoexposure
# Read exposure from config to use in the main loop
exposure = config.getint("video", "exposure", fallback=-1)
if exposure != -1:
# For a strange reason on some cameras (e.g. Lenoxo X1E)
# setting manual exposure works only after a couple frames
# are captured.
for i in range(5):
video_capture.grab()
video_capture.set(cv2.CAP_PROP_AUTO_EXPOSURE, 1.0) # 1 = Manual
video_capture.set(cv2.CAP_PROP_EXPOSURE, 167.0)
# Note the time it took to open the camera
timings["ic"] = time.time() - timings["ic"]
@ -272,3 +264,12 @@ while True:
# End peacefully
stop(0)
if exposure != -1:
# For a strange reason on some cameras (e.g. Lenoxo X1E)
# setting manual exposure works only after a couple frames
# are captured and even after a delay it does not
# always work. Setting exposure at every frame is
# reliable though.
video_capture.set(cv2.CAP_PROP_AUTO_EXPOSURE, 1.0) # 1 = Manual
video_capture.set(cv2.CAP_PROP_EXPOSURE, float(exposure))