epaperdisplay/imageconverter/img2array.py

131 lines
3.7 KiB
Python

from PIL import Image
import math
import argparse
import os.path
def swapBits(number, nbits):
if nbits==2:
bitstring = '{0:02b}'.format(number)
if nbits==3:
bitstring = '{0:03b}'.format(number)
if nbits==4:
bitstring = '{0:04b}'.format(number)
if nbits==5:
bitstring = '{0:05b}'.format(number)
if nbits==6:
bitstring = '{0:06b}'.format(number)
if nbits==7:
bitstring = '{0:07b}'.format(number)
if nbits==8:
bitstring = '{0:08b}'.format(number)
bitstring=bitstring[::-1]
return int(bitstring, 2)
parser = argparse.ArgumentParser(
prog = 'Image Edit Script',
description = 'Manipulate or extract information from an image file',
epilog = '')
parser.add_argument('filename') # positional argument
parser.add_argument('-n', '--bytesperline')
parser.add_argument('-d', '--bitdepth')
parser.add_argument('-b', '--lsbfirst', action='store_true') #lsb first for the whole byte
parser.add_argument('-c', '--colorlsbfirst', action='store_true') #lsb first for a single color
parser.add_argument('-i', '--invert', action='store_true')
args = parser.parse_args()
lsbfirst=args.lsbfirst
colorlsbfirst=args.colorlsbfirst
invert=args.invert
bitdepth=1
if args.bitdepth is not None:
_bd=int(int(args.bitdepth))
if _bd!=1 and _bd!=2 and _bd!=4 and _bd!=8:
print("bitdepth needs to be 1, 2, 4, or 8")
exit()
bitdepth=_bd
bytesperline=16
if args.bytesperline is not None:
bytesperline=int(args.bytesperline) #for output formatting
im = Image.open(args.filename) # Can be many different formats.
pix = im.load()
print(im.size) # Get the width and hight of the image for iterating over
array=[] #array with every element a byte
def calculateDistance(x1,y1,x2,y2):
dist = math.sqrt((x2 - x1)**2 + (y2 - y1)**2)
return dist
temp_byte=0
temp_byte_pos=0
for y in range(im.size[1]):
for x in range(im.size[0]):
c = pix[x,y] #get pixel
r=c[0]
g=c[1]
b=c[2]
_a=int((r+g+b)/3 )
brightness=int(_a)
brightnessreduced=brightness>>(8-bitdepth) #reduce to bitdepth
brightnessreduced_byte=brightnessreduced<<(8-bitdepth) #scale back to byte
pix[x,y]=(brightnessreduced_byte,brightnessreduced_byte,brightnessreduced_byte)
if invert:
brightnessreduced=pow(2,bitdepth)-1-brightnessreduced #only invert txt output
if colorlsbfirst:
brightnessreduced=swapBits(brightnessreduced,bitdepth)
temp_byte+=brightnessreduced<<temp_byte_pos #add to current byte
temp_byte_pos+=bitdepth
#print("temp byte "+str(temp_byte)+" pos="+str(temp_byte_pos)+" brightnessreduced="+str(brightnessreduced))
if temp_byte_pos>=8: #finished assemblying byte
if lsbfirst: #swap bit order
temp_byte=swapBits(temp_byte,8)
array.append(temp_byte)
#print("appending "+str(temp_byte))
temp_byte_pos=0 #reset
temp_byte=0
im.save(args.filename+'_result'+'.png')
if os.path.isfile(args.filename+'.txt'):
print("Outputfile "+args.filename+".txt exists")
exit()
with open(args.filename+'.txt', 'w') as f:
f.write("const unsigned char gImage_4in2[] = {")
f.write('\r\n')
counter=0
for a in array: #for every byte
hexstring="0X{:02X}".format(a)
f.write(hexstring+',') #Example output: 0XFF,0XFF,0XFF,0XFF,0XFF,0XFF,0XFF,0XFF,0XFF,0XFF,0XFF,0XFF,0XFF,0XFF,0XFF,0XFF,
counter+=1
if counter>=bytesperline:
f.write('\r\n')
counter=0
f.write("};")