initial + splitting composite images

elphel_exif.py

+__author__ = "Oleg Dzhimiev"
+__copyright__ = "Copyright (C) 2018 Elphel Inc."
+__license__ = "GPL-3.0+"
+__email__ = "oleg@elphel.com"
+
+'''
+Example usage:
+test.py:
+  import elphel_exif
+  info = elphel_exif.Exif("test.jpeg")
+  print(info)
+  print(info.MakerNote)
+  print(info.exif.toString())
+'''
+
+from PIL import Image
+from PIL.ExifTags import TAGS, GPSTAGS
+
+
+# Might be needed by some applications like:
+#   panoramic of Eyesis4Pi, composite images
+def elphel_add_to_PIL_TAGS():
+    TAGS[0x0129] = 'Page'
+    TAGS[0xC62F] = 'Camera Serial Number'
+
+
+# Open file and Parse
+def elphel_get_exif(f):
+  ret = {}
+
+  i = Image.open(f)
+  info = i._getexif()
+
+  elphel_add_to_PIL_TAGS()
+
+  for tag, value in info.items():
+    decoded = TAGS.get(tag, tag)
+
+    if decoded == 'GPSInfo':
+      gret = {}
+      for gtag,gval in value.items():
+        gdecoded = GPSTAGS.get(gtag,gtag)
+        gret[gdecoded] = gval
+      value = gret
+
+    if decoded == 'MakerNote':
+      value = elphel_MakerNote_parse(value)
+
+    ret[decoded] = value
+  return ret
+
+
+# Init with default values
+def elphel_MakerNote_defaults():
+  ret = {}
+  # defaults
+  ret['COLOR_MODE'] = 0
+  return ret
+
+
+# Based on JP46_Reader_camera.java's jp46Reorder()
+def elphel_MakerNote_parse(MakerNote):
+  ret = {}
+  ret = elphel_MakerNote_defaults()
+
+  ret['GAIN_R' ] = MakerNote[0]/65536.0
+  ret['GAIN_G']  = MakerNote[1]/65536.0
+  ret['GAIN_GB'] = MakerNote[2]/65536.0
+  ret['GAIN_B']  = MakerNote[3]/65536.0
+
+  ret['BLACK_R']  = (MakerNote[4]>>24)/256.0
+  ret['BLACK_G']  = (MakerNote[5]>>24)/256.0
+  ret['BLACK_GB'] = (MakerNote[6]>>24)/256.0
+  ret['BLACK_B']  = (MakerNote[7]>>24)/256.0
+
+  ret['GAMMA_R']  = ((MakerNote[4]>>16)&0xff)/100.0
+  ret['GAMMA_G']  = ((MakerNote[5]>>16)&0xff)/100.0
+  ret['GAMMA_GB'] = ((MakerNote[6]>>16)&0xff)/100.0
+  ret['GAMMA_B']  = ((MakerNote[7]>>16)&0xff)/100.0
+
+  ret['GAMMA_SCALE_R']  = MakerNote[4]&0xffff
+  ret['GAMMA_SCALE_G']  = MakerNote[5]&0xffff
+  ret['GAMMA_SCALE_GB'] = MakerNote[6]&0xffff
+  ret['GAMMA_SCALE_B']  = MakerNote[7]&0xffff
+
+  if len(MakerNote)>=14:
+
+    if (MakerNote[10]&0xc0000000)!=0:
+      composite = 1
+    else:
+      composite = 0
+
+    ret['COMPOSITE'] = composite
+
+    if composite:
+
+      ret['HEIGHT1'] = MakerNote[11]&0xffff
+      ret['BLANK1'] = (MakerNote[11]>>16)&0xffff
+
+      ret['HEIGHT2'] = MakerNote[12]&0xffff
+      ret['BLANK2'] = (MakerNote[12]>>16)&0xffff
+
+      ret['HEIGHT3'] = (MakerNote[9]>>16)-ret['HEIGHT1']-ret['BLANK1']-ret['HEIGHT2']-ret['BLANK2']
+
+      ret['FLIPH1'] = (MakerNote[10]>>24)&0x1
+      ret['FLIPV1'] = (MakerNote[10]>>25)&0x1
+
+      ret['FLIPH2'] = (MakerNote[10]>>26)&0x1
+      ret['FLIPV2'] = (MakerNote[10]>>27)&0x1
+
+      ret['FLIPH3'] = (MakerNote[10]>>28)&0x1
+      ret['FLIPV3'] = (MakerNote[10]>>29)&0x1
+
+    ret['PORTRAIT'] = (MakerNote[13]>>7)&0x1
+    ret['YTABLEFORC'] = (MakerNote[13]>>15)&0x1
+    ret['QUALITY'] = MakerNote[13]&0x7f
+    ret['CQUALITY'] = (MakerNote[13]>>8)&0x7f
+
+    if ret['CQUALITY']==0:
+      ret['CQUALITY'] = ret['QUALITY']
+
+    ret['CORING_INDEX_Y'] = (MakerNote[13]>>16)&0x7f
+    ret['CORING_INDEX_C'] = (MakerNote[13]>>24)&0x7f
+
+    if ret['CORING_INDEX_C']==0:
+      ret['CORING_INDEX_C'] = ret['CORING_INDEX_Y']
+
+  if len(MakerNote)>=12:
+
+    ret['WOI_LEFT']   = MakerNote[8]&0xffff
+    ret['WOI_WIDTH']  = MakerNote[8]>>16
+    ret['WOI_TOP']    = MakerNote[9]&0xffff
+    ret['WOI_HEIGHT'] = MakerNote[9]>>16
+    ret['FLIPH']      = MakerNote[10]&0x1
+    ret['FLIPV']      = (MakerNote[10]>>1)&0x1
+    ret['BAYER_MODE'] = (MakerNote[10]>>2)&0x3
+
+    ret['COLOR_MODE'] = (MakerNote[10]>>4)&0x0f
+
+    ret['DCM_HOR']    = (MakerNote[10]>>8)&0x0f
+    ret['DCM_VERT']   = (MakerNote[10]>>12)&0x0f
+    ret['BIN_HOR']    = (MakerNote[10]>>16)&0x0f
+    ret['BIN_VERT']   = (MakerNote[10]>>20)&0x0f
+
+  # HW specific temperature readings
+  if len(MakerNote)>=16:
+
+    ret['TEMP1'] = (MakerNote[14]>> 0)&0xffff
+    ret['TEMP2'] = (MakerNote[14]>>16)&0xffff
+    ret['TEMP3'] = (MakerNote[14]>> 0)&0xffff
+    ret['TEMP4'] = (MakerNote[14]>>16)&0xffff
+
+  return ret
+
+
+# Class
+class Exif:
+
+  def __init__(self,f):
+    self.f = f
+    self.data = elphel_get_exif(f)
+    self.MakerNote = self.data['MakerNote']
+    #self.color_mode = self.data['MakerNote']['COLOR_MODE']
+
+
+  def toString(self):
+    res = ''
+    for k in self.data:
+      if k!='MakerNote':
+        res += str(k)+": "+str(self.data[k])+"\n"
+
+    res += "MakerNote: \n"
+    for k in self.data['MakerNote']:
+      res += "    "+str(k)+": "+str(self.data['MakerNote'][k])+"\n"
+
+    return res[:-1]

jp4-to-png.py

+#!/usr/bin/env python3
+
+import jp4
+#import cv2
+import numpy as np
+import sys
+from PIL import Image, ImageOps
+
+try:
+  filename = sys.argv[1]
+except IndexError:
+  filename = "test.jp4"
+
+img = jp4.JP4(filename)
+
+# print exif
+#print(img.exif.toString())
+
+# deblock if JP4 (auto read from exif) skip if other
+img.deblock()
+img.demosaic_bilinear()
+img.saturation()
+
+I = img.image[...,[2,1,0]].astype(np.uint8)
+res = Image.fromarray(I)
+#res.save("result.png")
+# also works
+#res.save("result.jpeg")
+
+# for Eyesis4pi
+
+exif = img.exif
+mn = exif.MakerNote
+
+#print(exif.MakerNote)
+
+# common
+#    WOI_WIDTH
+#    FLIPH
+#    FLIPV
+#    PORTRAIT
+#    COMPOSITE
+# individual
+#    HEIGHTx, 1..3
+#    FLIPHx, 1..3
+#    FLIPVx, 1..3
+#    BLANKx, only 1 and 2
+
+if mn['COMPOSITE']:
+  
+  W = mn['WOI_WIDTH']
+  H = mn['WOI_HEIGHT']
+  FH = mn['FLIPH']
+  FV = mn['FLIPV']
+  
+  #if FV:
+  #  I = 
+  
+  v_offset = 0
+  
+  for i in range(1,4):
+    
+    try:
+      height = mn['HEIGHT'+str(i)]
+      #fliph  = mn['FLIPH'+str(i)]
+      flipv  = mn['FLIPV'+str(i)]
+    except KeyError:
+      # break for '_9'
+      break
+    
+    try:
+      blank = mn['BLANK'+str(i)]
+    except KeyError:
+      blank = 0
+    
+    crop = res.crop((0,v_offset,W,v_offset+height))
+    
+    if flipv:
+      crop = ImageOps.flip(crop)
+      
+    # if eyesis4pi, 1&2 - rotate 90CW, 3 - 90CCW
+    if i<3:
+      crop = crop.rotate(-90,expand=1)
+    else:
+      crop = crop.rotate(90,expand=1)
+      
+    crop.save("result_"+str(i)+".jpeg")
+    
+    v_offset += height + blank