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Update parser.py

master
Gabriele Girelli 4 years ago
committed by GitHub
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commit
72cf9fca5d
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1 changed files with 8 additions and 6 deletions
  1. +8
    -6
      nd2reader/parser.py

+ 8
- 6
nd2reader/parser.py View File

@ -246,20 +246,22 @@ class Parser(object):
"""
return {channel: n for n, channel in enumerate(self.metadata["channels"])}
def _remove_unwanted_bytes(self, image_group_data, image_data_start, height, width):
# Remove unwanted 0-bytes that can appear in stitched images
number_of_true_channels = int(len(image_group_data[4:]) / (height * width))
unwanted_bytes_len = (len(image_group_data[image_data_start:]))%(height*width)
if not unwanted_bytes_len:
n_unwanted_bytes = (len(image_group_data[image_data_start:]))%(height*width)
if not n_unwanted_bytes:
return
warnings.warn('Identified unwanted bytes in the ND2 file, possibly stitched.')
byte_ids = range(image_data_start+height*number_of_true_channels, len(image_group_data)-unwanted_bytes_len+1, height*number_of_true_channels)
assert 0 == n_unwanted_bytes % height, "Unexpected unwanted bytes distribution."
unwanted_byte_per_step = n_unwanted_bytes // height
byte_ids = range(image_data_start+height*number_of_true_channels, len(image_group_data)-n_unwanted_bytes+1, height*number_of_true_channels)
if all([0 == image_group_data[byte_ids[i]+i] for i in range(len(byte_ids))]):
warnings.warn('All unwanted bytes are zero-bytes, correctly removed.')
warnings.warn(f'Identified {n_unwanted_bytes} ({unwanted_byte_per_step}*{height}) unwanted zero-bytes in the ND2 file, removed.')
for i in range(len(byte_ids)):
del image_group_data[byte_ids[i]]
else:
warnings.warn(f'Identified {n_unwanted_bytes} unwanted non-zero bytes in the ND2 file.')
def _get_raw_image_data(self, image_group_number, channel_offset, height, width):
"""Reads the raw bytes and the timestamp of an image.


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