Extracts data from LRIT Additional Data (ADD) files.
Data includes Alpha-numeric text (ANT), CMDPS (CT/CTT/CTH), and GOCI.
"""
import argparse
from coms import COMS as comsClass
argparser = argparse.ArgumentParser(
description=
"Extracts data from LRIT Additional Data (ADD) files. Data includes Alpha-numeric text (ANT), CMDPS (CT/CTT/CTH), and GOCI."
)
argparser.add_argument("PATH", action="store", help="Input LRIT file")
args = argparser.parse_args()
# Create COMS class instance and load LRIT file
COMS = comsClass(args.PATH)
# Primary Header (type 0, required)
COMS.parsePrimaryHeader(True)
# START OPTIONAL HEADERS
COMS.parseAnnotationTextHeader(True)
COMS.parseTimestampHeader(True)
COMS.parseKeyHeader(True)
# BEGIN DATA DUMPING
data = COMS.readbytes(0, COMS.primaryHeader['data_field_len'])
if COMS.primaryHeader['file_type'] == 2: # Alphanumeric Text (ANT)
action="store",
help="Overlay text fill colour",
default="white")
args = argparser.parse_args()
segments = [] # List of IMG files
totalWidth = 0
totalHeight = 0
if os.path.isdir(args.INPUT): # If input is a directory
multipleSegments = True
print("Detecting IMG segments...")
# Loop through files with .hrit extension in input folder
for file in glob.glob(args.INPUT + "/*.hrit"):
COMS = comsClass(file)
COMS.parsePrimaryHeader()
COMS.parseImageStructureHeader()
if COMS.primaryHeader[
'file_type'] == 0: # Check HRIT file has IMG file type
segments.append(file) # Add to list of valid IMG files
totalHeight += COMS.imageStructureHeader['num_lines']
totalWidth = COMS.imageStructureHeader['num_cols']
if segments.__len__() <= 0:
print("No valid IMG files found")
exit(1)
print("Found {0} segments: ".format(segments.__len__()))
for segment in segments: # List detected segments