def get_base_time():
'''we need to get a baseline time from the camera. To do that we trigger
in single shot mode until we get a good image, and use the time we
triggered as the base time'''
frame_time = None
error_count = 0
print('Opening camera')
h = chameleon.open(not opts.mono, opts.depth, opts.brightness)
print('camera is open')
if opts.framerate != 0:
chameleon.set_framerate(h, opts.framerate)
while frame_time is None:
try:
base_time = time.time()
im = numpy.zeros((960,1280),dtype='uint8' if opts.depth==8 else 'uint16')
chameleon.trigger(h, False)
frame_time, frame_counter, shutter = chameleon.capture(h, 1000, im)
base_time -= frame_time
except chameleon.error:
print('failed to capture')
error_count += 1
if error_count > 3:
error_count = 0
print('re-opening camera')
chameleon.close(h)
h = chameleon.open(not opts.mono, opts.depth, opts.brightness)
if opts.framerate != 0:
chameleon.set_framerate(h, opts.framerate)
return h, base_time, frame_time
def get_base_time():
'''we need to get a baseline time from the camera. To do that we trigger
in single shot mode until we get a good image, and use the time we
triggered as the base time'''
frame_time = None
error_count = 0
print('Opening camera')
h = chameleon.open(not opts.mono, opts.depth, opts.brightness)
print('camera is open')
if opts.framerate != 0:
chameleon.set_framerate(h, opts.framerate)
while frame_time is None:
try:
base_time = time.time()
im = numpy.zeros((960,1280),dtype='uint8' if opts.depth==8 else 'uint16')
chameleon.trigger(h, False)
frame_time, frame_counter, shutter = chameleon.capture(h, 1000, im)
base_time -= frame_time
except chameleon.error:
print('failed to capture')
error_count += 1
if error_count > 3:
error_count = 0
print('re-opening camera')
chameleon.close(h)
h = chameleon.open(not opts.mono, opts.depth, opts.brightness)
return h, base_time, frame_time
def run_capture():
'''the main capture loop'''
print("Getting base frame time")
h, base_time, last_frame_time = get_base_time()
if not opts.trigger:
print('Starting continuous trigger')
chameleon.trigger(h, True)
frame_loss = 0
num_captured = 0
last_frame_counter = 0
error_count = 0
print('Starting main capture loop')
while True:
im = numpy.zeros((960,1280),dtype='uint8' if opts.depth==8 else 'uint16')
try:
if opts.trigger:
chameleon.trigger(h, False)
frame_time, frame_counter, shutter = chameleon.capture(h, 1000, im)
except chameleon.error:
print('failed to capture')
error_count += 1
if error_count > 3:
error_count = 0
print('re-opening camera')
chameleon.close(h)
h = chameleon.open(not opts.mono, opts.depth, opts.brightness)
if opts.framerate != 0:
chameleon.set_framerate(h, opts.framerate)
if not opts.trigger:
print('Starting continuous trigger')
chameleon.trigger(h, True)
continue
if frame_time < last_frame_time:
base_time += 128
if last_frame_counter != 0:
frame_loss += frame_counter - (last_frame_counter+1)
if opts.compress or opts.scan:
state.bayer_queue.put((base_time+frame_time, im))
if opts.save and not opts.compress:
if opts.reduction == 0 or num_captured % opts.reduction == 0:
state.save_queue.put((base_time+frame_time, im, False))
print("Captured %s shutter=%f tdelta=%f(%.2f) ft=%f loss=%u qsave=%u qbayer=%u qcompress=%u scan=%u" % (
cuav_util.frame_time(base_time+frame_time),
shutter,
frame_time - last_frame_time,
1.0/(frame_time - last_frame_time),
frame_time,
frame_loss,
state.save_queue.qsize(),
state.bayer_queue.qsize(),
state.compress_queue.qsize(),
state.scan_queue.qsize()))
error_count = 0
last_frame_time = frame_time
last_frame_counter = frame_counter
num_captured += 1
if num_captured == opts.num_frames:
break
print('Closing camera')
time.sleep(2)
chameleon.close(h)
