John's Blog

#!/usr/bin/env python
 
import sys, Image
 
def reduce_color(c):
    if c  64 and c  128 and c > y) & 1) for y in range(1, -1, -1)])
 
def main():
    if len(sys.argv) != 3:
        raise Exception('Must have 2 arguments. %s input.image output.t2b' % sys.argv[0])
 
    outf = open(sys.argv[2], 'wb')
 
    im = Image.open(sys.argv[1]).convert("L")
    im.thumbnail((96, 144))
 
    newim = Image.new('L', (96, 144), 'white')
 
    x,y = im.size
    newim.paste(im, ((96-x)/2, (144-y)/2))
 
    px = []
    pxs = newim.getdata()
    for i in range(len(pxs)):
        px.append(pxs[i])
        if len(px) >= 4:
            binstr = i2b(reduce_color(px[0])) + i2b(reduce_color(px[1])) + i2b(reduce_color(px[2])) + i2b(reduce_color(px[3]))
            outf.write(chr(int(binstr, 2)))
            px = []
 
    outf.close()
 
if __name__ == '__main__':
    main()

#!/usr/bin/env python
 
import sys, os
 
def get_greys(b):
    b.zfill(8)
    b = "".join([str((ord(b) >> y) & 1) for y in range(7, -1, -1)])
 
    w = str(int(b[0:2],2))
    x = str(int(b[2:4],2))
    y = str(int(b[4:6],2))
    z = str(int(b[6:8],2))
 
    return [w, x, y, z]
 
def main():
    if len(sys.argv) != 3:
        raise Exception('Must have 2 arguments. %s input.t2b output.pgm' % sys.argv[0])
 
    t2bfile = open(sys.argv[1], 'rb')
    pgmfile = open(sys.argv[2], 'w')
 
    pgmfile.write('P2\n96 144\n3\n')
 
    for i in range(144):
        for j in range(24):
            b = t2bfile.read(1)
 
            if b != '':
                vals = get_greys(b)
                pgmfile.write('%s %s %s %s ' % (vals[0], vals[1], vals[2], vals[3]))
        pgmfile.write('\n')
 
    pgmfile.close()
    t2bfile.close()
 
if __name__ == '__main__':
    main()