def test_check_if_image_is_too_dark_returns_false_if_image_is_not_too_dark(
self, as_get_image_mean_pixel_value):
as_get_image_mean_pixel_value.return_value = 50.0
ret_val = ans.check_if_image_is_too_dark('whatever', 49)
assert not ret_val
assert as_get_image_mean_pixel_value.called_once_with('whatever')
def take_picam_still(snap_id, group_id, normal_exposure_pic_id, long_exposure_pic_id):
'''
Top level method in the camera service for taking a still image via the picam (regular raspberry pi) camera.
Also saves a picture record to the db
Depending on settings and real time conditions, may cause a second, longer exposure to be taken
'''
group_document = get_group_document(str(group_id))
retake_picam_pics_when_dark = get_retake_picam_pics_when_dark_setting(group_document)
brightness_threshold = get_brightness_threshold(group_document)
picture_name = build_picture_name(normal_exposure_pic_id)
pic_path = build_picture_path(picture_name=picture_name, snap_id=snap_id)
pic_dict = {
'_id': str(normal_exposure_pic_id),
'type': 'picture',
'source': 'picam',
'exposure_type': 'standard',
'group_id': str(group_id),
'snap_id': str(snap_id),
'filename': picture_name,
'uri': pic_path,
'created': str(datetime.datetime.now())
}
take_standard_exposure_picam_still(pic_path)
save_picture(pic_dict)
image_is_too_dark = check_if_image_is_too_dark(pic_path, brightness_threshold)
if image_is_too_dark and retake_picam_pics_when_dark:
picture_name = build_picture_name(long_exposure_pic_id)
pic_path = build_picture_path(picture_name=picture_name, snap_id=snap_id)
pic_dict2 = copy.deepcopy(pic_dict)
pic_dict2['exposure_type'] = 'long'
pic_dict2['_id'] = str(long_exposure_pic_id)
pic_dict2['filename'] = picture_name
pic_dict2['uri'] = pic_path
pic_dict2['created'] = str(datetime.datetime.now())
take_long_exposure_picam_still(pic_path)
save_picture(pic_dict2)
