/usr/share/pyshared/fabio/GEimage.py is in python-fabio 0.0.8-1.
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#
# Reads the header from a GE a-Si Angio Detector
# Using version 8001 of the header from file:
# c:\adept\core\DefaultImageInfoConfig.csv
#
# Antonino Miceli
# Thu Jan 4 13:46:31 CST 2007
#
# modifications by Jon Wright for style, pychecker and fabio
#
import numpy
import struct, logging
logger = logging.getLogger("GEimage")
from fabioimage import fabioimage
from fabioutils import next_filename, previous_filename
GE_HEADER_INFO = [
# Name, length in bytes, format for struct (None means string)
('ImageFormat', 10, None),
('VersionOfStandardHeader', 2, '=H'),
('StandardHeaderSizeInBytes', 4, '=L'),
('VersionOfUserHeader', 2, '=H'),
('UserHeaderSizeInBytes', 4, '=L'),
('NumberOfFrames', 2, '=H'),
('NumberOfRowsInFrame', 2, '=H'),
('NumberOfColsInFrame', 2, '=H'),
('ImageDepthInBits', 2, '=H'),
('AcquisitionDate', 20, None),
('AcquisitionTime', 20, None),
('DUTID', 20, None),
('Operator', 50, None),
('DetectorSignature', 20, None),
('TestSystemName', 20, None),
('TestStationRevision', 20, None),
('CoreBundleRevision', 20, None),
('AcquisitionName', 40, None),
('AcquisitionParameterRevision', 20, None),
('OriginalNumberOfRows', 2, '=H'),
('OriginalNumberOfColumns', 2, '=H'),
('RowNumberUpperLeftPointArchiveROI', 2, '=H'),
('ColNumberUpperLeftPointArchiveROI', 2, '=H'),
('Swapped', 2, '=H'),
('Reordered', 2, '=H'),
('HorizontalFlipped', 2, '=H'),
('VerticalFlipped', 2, '=H'),
('WindowValueDesired', 2, '=H'),
('LevelValueDesired', 2, '=H'),
('AcquisitionMode', 2, '=H'),
('AcquisitionType', 2, '=H'),
('UserAcquisitionCoffFileName1', 100, None),
('UserAcquisitionCoffFileName2', 100, None),
('FramesBeforeExpose', 2, '=H'),
('FramesDuringExpose', 2, '=H'),
('FramesAfterExpose', 2, '=H'),
('IntervalBetweenFrames', 2, '=H'),
('ExposeTimeDelayInMicrosecs', 8, '=d'),
('TimeBetweenFramesInMicrosecs', 8, '=d'),
('FramesToSkipExpose', 2, '=H'),
('ExposureMode', 2, '=H'),
('PrepPresetTimeInMicrosecs', 8, '=d'),
('ExposePresetTimeInMicrosecs', 8, '=d'),
('AcquisitionFrameRateInFps', 4, '=f'),
('FOVSelect', 2, '=H'),
('ExpertMode', 2, '=H'),
('SetVCommon1', 8, '=d'),
('SetVCommon2', 8, '=d'),
('SetAREF', 8, '=d'),
('SetAREFTrim', 4, '=L'),
('SetSpareVoltageSource', 8, '=d'),
('SetCompensationVoltageSource', 8, '=d'),
('SetRowOffVoltage', 8, '=d'),
('SetRowOnVoltage', 8, '=d'),
('StoreCompensationVoltage', 4, '=L'),
('RampSelection', 2, '=H'),
('TimingMode', 2, '=H'),
('Bandwidth', 2, '=H'),
('ARCIntegrator', 2, '=H'),
('ARCPostIntegrator', 2, '=H'),
('NumberOfRows', 4, '=L'),
('RowEnable', 2, '=H'),
('EnableStretch', 2, '=H'),
('CompEnable', 2, '=H'),
('CompStretch', 2, '=H'),
('LeftEvenTristate', 2, '=H'),
('RightOddTristate', 2, '=H'),
('TestModeSelect', 4, '=L'),
('AnalogTestSource', 4, '=L'),
('VCommonSelect', 4, '=L'),
('DRCColumnSum', 4, '=L'),
('TestPatternFrameDelta', 4, '=L'),
('TestPatternRowDelta', 4, '=L'),
('TestPatternColumnDelta', 4, '=L'),
('DetectorHorizontalFlip', 2, '=H'),
('DetectorVerticalFlip', 2, '=H'),
('DFNAutoScrubOnOff', 2, '=H'),
('FiberChannelTimeOutInMicrosecs', 4, '=L'),
('DFNAutoScrubDelayInMicrosecs', 4, '=L'),
('StoreAECROI', 2, '=H'),
('TestPatternSaturationValue', 2, '=H'),
('TestPatternSeed', 4, '=L'),
('ExposureTimeInMillisecs', 4, '=f'),
('FrameRateInFps', 4, '=f'),
('kVp', 4, '=f'),
('mA', 4, '=f'),
('mAs', 4, '=f'),
('FocalSpotInMM', 4, '=f'),
('GeneratorType', 20, None),
('StrobeIntensityInFtL', 4, '=f'),
('NDFilterSelection', 2, '=H'),
('RefRegTemp1', 8, '=d'),
('RefRegTemp2', 8, '=d'),
('RefRegTemp3', 8, '=d'),
('Humidity1', 4, '=f'),
('Humidity2', 4, '=f'),
('DetectorControlTemp', 8, '=d'),
('DoseValueInmR', 8, '=d'),
('TargetLevelROIRow0', 2, '=H'),
('TargetLevelROICol0', 2, '=H'),
('TargetLevelROIRow1', 2, '=H'),
('TargetLevelROICol1', 2, '=H'),
('FrameNumberForTargetLevelROI', 2, '=H'),
('PercentRangeForTargetLevel', 2, '=H'),
('TargetValue', 2, '=H'),
('ComputedMedianValue', 2, '=H'),
('LoadZero', 2, '=H'),
('MaxLUTOut', 2, '=H'),
('MinLUTOut', 2, '=H'),
('MaxLinear', 2, '=H'),
('Reserved', 2, '=H'),
('ElectronsPerCount', 2, '=H'),
('ModeGain', 2, '=H'),
('TemperatureInDegC', 8, '=d'),
('LineRepaired', 2, '=H'),
('LineRepairFileName', 100, None),
('CurrentLongitudinalInMM', 4, '=f'),
('CurrentTransverseInMM', 4, '=f'),
('CurrentCircularInMM', 4, '=f'),
('CurrentFilterSelection', 4, '=L'),
('DisableScrubAck', 2, '=H'),
('ScanModeSelect', 2, '=H'),
('DetectorAppSwVersion', 20, None),
('DetectorNIOSVersion', 20, None),
('DetectorPeripheralSetVersion', 20, None),
('DetectorPhysicalAddress', 20, None),
('PowerDown', 2, '=H'),
('InitialVoltageLevel_VCOMMON', 8, '=d'),
('FinalVoltageLevel_VCOMMON', 8, '=d'),
('DmrCollimatorSpotSize', 10, None),
('DmrTrack', 5, None),
('DmrFilter', 5, None),
('FilterCarousel', 2, '=H'),
('Phantom', 20, None),
('SetEnableHighTime', 2, '=H'),
('SetEnableLowTime', 2, '=H'),
('SetCompHighTime', 2, '=H'),
('SetCompLowTime', 2, '=H'),
('SetSyncLowTime', 2, '=H'),
('SetConvertLowTime', 2, '=H'),
('SetSyncHighTime', 2, '=H'),
('SetEOLTime', 2, '=H'),
('SetRampOffsetTime', 2, '=H'),
('FOVStartingValue', 2, '=H'),
('ColumnBinning', 2, '=H'),
('RowBinning', 2, '=H'),
('BorderColumns64', 2, '=H'),
('BorderRows64', 2, '=H'),
('FETOffRows64', 2, '=H'),
('FOVStartColumn128', 2, '=H'),
('FOVStartRow128', 2, '=H'),
('NumberOfColumns128', 2, '=H'),
('NumberOfRows128', 2, '=H'),
('VFPAquisition', 2000, None),
('Comment', 200, None)
]
class GEimage(fabioimage):
_need_a_seek_to_read = True
def _readheader(self, infile):
""" Read a GE image header """
infile.seek(0)
self.header = {}
for name, nbytes, format in GE_HEADER_INFO:
if format is None:
self.header[ name ] = infile.read(nbytes)
else:
self.header[ name ] = struct.unpack(format,
infile.read(nbytes))[0]
def read(self, fname, frame=0):
"""
Read in header into self.header and
the data into self.data
"""
self.header = {}
self.resetvals()
infile = self._open(fname, "rb")
self.sequencefilename = fname
self._readheader(infile)
self.nframes = self.header['NumberOfFrames']
self._readframe(infile, frame)
infile.close()
return self
def _makeframename(self):
""" The thing to be printed for the user to represent a frame inside
a file """
self.filename = "%s$%04d" % (self.sequencefilename,
self.currentframe)
def _readframe(self, filepointer, img_num):
"""
# Load only one image from the sequence
# Note: the first image in the sequence 0
# raises an exception if you give an invalid image
# otherwise fills in self.data
"""
if(img_num > self.nframes or img_num < 0):
raise Exception("Bad image number")
imgstart = self.header['StandardHeaderSizeInBytes'] + \
self.header['UserHeaderSizeInBytes'] + \
img_num * self.header['NumberOfRowsInFrame'] * \
self.header['NumberOfColsInFrame'] * \
self.header['ImageDepthInBits'] / 8
# whence = 0 means seek from start of file
filepointer.seek(imgstart, 0)
self.bpp = self.header['ImageDepthInBits'] / 8 # hopefully 2
imglength = self.header['NumberOfRowsInFrame'] * \
self.header['NumberOfColsInFrame'] * self.bpp
if self.bpp != 2:
logging.warning("Using uint16 for GE but seems to be wrong")
# Guessing it is always unsigned int?
self.data = numpy.fromstring(filepointer.read(imglength), numpy.uint16)
self.data.shape = (self.header['NumberOfRowsInFrame'],
self.header['NumberOfColsInFrame'])
self.dim2 , self.dim1 = self.data.shape
self.currentframe = int(img_num)
self._makeframename()
def write(self, fname, force_type=numpy.uint16):
""" Not yet implemented"""
raise Exception("Write is not implemented")
def getframe(self, num):
"""
Returns a frame as a new fabioimage object
"""
if num < 0 or num > self.nframes:
raise Exception("Requested frame number is out of range")
# Do a deep copy of the header to make a new one
newheader = {}
for k in self.header.keys():
newheader[k] = self.header[k]
frame = GEimage(header=newheader)
frame.nframes = self.nframes
frame.sequencefilename = self.sequencefilename
infile = frame._open(self.sequencefilename, "rb")
frame._readframe(infile, num)
infile.close()
return frame
def next(self):
"""
Get the next image in a series as a fabio image
"""
if self.currentframe < (self.nframes - 1) and self.nframes > 1:
return self.getframe(self.currentframe + 1)
else:
newobj = GEimage()
newobj.read(next_filename(
self.sequencefilename))
return newobj
def previous(self):
"""
Get the previous image in a series as a fabio image
"""
if self.currentframe > 0:
return self.getframe(self.currentframe - 1)
else:
newobj = GEimage()
newobj.read(previous_filename(
self.sequencefilename))
return newobj
def demo():
import sys, time
if len(sys.argv) < 2:
print "USAGE: GE_script.py <GEaSi_raw_image_file>"
sys.exit()
image_file = sys.argv[1]
print "init read_GEaSi_data class and load header.."
sequence1 = GEimage()
sequence1.read(image_file)
print "TimeBetweenFramesInMicrosecs = ",
print sequence1.header['TimeBetweenFramesInMicrosecs']
print "AcquisitionTime = ",
print sequence1.header['AcquisitionTime']
print "Mean = ", sequence1.data.ravel().mean()
while 1:
start = time.time()
try:
sequence1 = sequence1.next()
print sequence1.currentframe, sequence1.data.ravel().mean(), \
time.time() - start
except:
raise
break
if __name__ == '__main__':
demo()
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