pixel_count.py

#!/usr/bin/python
from operator import itemgetter
from PIL import Image, ImageDraw, ImageFont


# Make a lowercase + uppercase alphabet.
alphabet = 'abcdefghijklmnopqrstuvwxyz'
alphabet += ''.join(map(str.upper, alphabet))
#alphabet="z"

# We'll use Helvetica in big type.
helvetica = ImageFont.truetype('/usr/share/fonts/liberation/LiberationSerif-Regular.ttf', 100)


def draw_letter(letter, save=True):
    img = Image.new('RGB', (100, 100), 'white')

    draw = ImageDraw.Draw(img)
    draw.text((0,0), letter, font=helvetica, fill='#000000')
    
    if save:
        img.save("imgs/{}.png".format(letter), 'PNG')
    img = img.rotate(90) #hack to find width
    return img

def count_black_pixels(img):
    pixels = list(img.getdata())
    return len(filter(lambda rgb: sum(rgb) == 0, pixels))

def convert2D(data, size):
    a = []
    for i in range(0, size):
        b = []
        for j in range(0, size):
            b.append(data[i*size+j]);
        a.append(b)
    
    return a
    
def count_width(img):
    pixels = convert2D(img.getdata(), 100)
    width_sum = 0
    blank_width = 0
    turn_blank_counting_on = False
    for i in pixels:
        if len(filter(lambda rgb: sum(rgb) == 0, i)) > 0:
            width_sum += 1
            width_sum += blank_width
            blank_width = 0
            turn_blank_counting_on = True
            
        elif turn_blank_counting_on:
            blank_width += 1
    return width_sum    

def count_height(img):
    img = img.rotate(90)
    return count_width(img)

if __name__ == '__main__':
    stats = []
    for letter in alphabet:
        img = draw_letter(letter)
        width = count_width(img)
        height = count_height(img)
        area = width*height
        stats.append((letter, width, height, area))
        
    
    
    print "Descending order : pixels occupy"
    print "---------------------------------"
    print sorted(stats, key=itemgetter(3), reverse=True)
    print "Descending order : width"
    print "---------------------------------"
    print sorted(stats, key=itemgetter(1), reverse=True)
    print "Descending order : height"
    print "---------------------------------"
    print sorted(stats, key=itemgetter(2), reverse=True)

results

Descending order : pixels occupy
---------------------------------
[('W', 93, 66, 6138), ('M', 83, 65, 5395), ('Q', 62, 76, 4712), ('A', 70, 66, 4620), ('V', 69, 66, 4554), ('K', 68, 65, 4420), ('X', 67, 65, 4355), ('Y', 67, 65, 4355), ('H', 66, 65, 4290), ('N', 66, 65, 4290), ('U', 66, 65, 4290), ('D', 64, 65, 4160), ('G', 63, 65, 4095), ('R', 63, 65, 4095), ('O', 62, 65, 4030), ('T', 58, 65, 3770), ('B', 57, 65, 3705), ('C', 55, 65, 3575), ('E', 52, 65, 3380), ('m', 73, 46, 3358), ('w', 70, 47, 3290), ('L', 49, 65, 3185), ('Z', 49, 65, 3185), ('h', 46, 69, 3174), ('k', 46, 69, 3174), ('F', 48, 65, 3120), ('P', 48, 65, 3120), ('b', 44, 69, 3036), ('d', 43, 69, 2967), ('S', 42, 65, 2730), ('y', 44, 57, 2508), ('p', 43, 57, 2451), ('g', 40, 61, 2440), ('v', 49, 47, 2303), ('J', 35, 65, 2275), ('x', 48, 46, 2208), ('q', 38, 58, 2204), ('n', 45, 46, 2070), ('u', 45, 46, 2070), ('f', 29, 69, 2001), ('o', 40, 46, 1840), ('z', 38, 46, 1748), ('a', 37, 46, 1702), ('c', 36, 46, 1656), ('e', 36, 46, 1656), ('I', 25, 65, 1625), ('l', 22, 69, 1518), ('t', 26, 56, 1456), ('i', 22, 65, 1430), ('r', 30, 47, 1410), ('s', 30, 46, 1380), ('j', 14, 76, 1064)]
Descending order : width
---------------------------------
[('W', 93, 66, 6138), ('M', 83, 65, 5395), ('m', 73, 46, 3358), ('w', 70, 47, 3290), ('A', 70, 66, 4620), ('V', 69, 66, 4554), ('K', 68, 65, 4420), ('X', 67, 65, 4355), ('Y', 67, 65, 4355), ('H', 66, 65, 4290), ('N', 66, 65, 4290), ('U', 66, 65, 4290), ('D', 64, 65, 4160), ('G', 63, 65, 4095), ('R', 63, 65, 4095), ('O', 62, 65, 4030), ('Q', 62, 76, 4712), ('T', 58, 65, 3770), ('B', 57, 65, 3705), ('C', 55, 65, 3575), ('E', 52, 65, 3380), ('v', 49, 47, 2303), ('L', 49, 65, 3185), ('Z', 49, 65, 3185), ('x', 48, 46, 2208), ('F', 48, 65, 3120), ('P', 48, 65, 3120), ('h', 46, 69, 3174), ('k', 46, 69, 3174), ('n', 45, 46, 2070), ('u', 45, 46, 2070), ('b', 44, 69, 3036), ('y', 44, 57, 2508), ('d', 43, 69, 2967), ('p', 43, 57, 2451), ('S', 42, 65, 2730), ('g', 40, 61, 2440), ('o', 40, 46, 1840), ('q', 38, 58, 2204), ('z', 38, 46, 1748), ('a', 37, 46, 1702), ('c', 36, 46, 1656), ('e', 36, 46, 1656), ('J', 35, 65, 2275), ('r', 30, 47, 1410), ('s', 30, 46, 1380), ('f', 29, 69, 2001), ('t', 26, 56, 1456), ('I', 25, 65, 1625), ('i', 22, 65, 1430), ('l', 22, 69, 1518), ('j', 14, 76, 1064)]
Descending order : height
---------------------------------
[('j', 14, 76, 1064), ('Q', 62, 76, 4712), ('b', 44, 69, 3036), ('d', 43, 69, 2967), ('f', 29, 69, 2001), ('h', 46, 69, 3174), ('k', 46, 69, 3174), ('l', 22, 69, 1518), ('A', 70, 66, 4620), ('V', 69, 66, 4554), ('W', 93, 66, 6138), ('i', 22, 65, 1430), ('B', 57, 65, 3705), ('C', 55, 65, 3575), ('D', 64, 65, 4160), ('E', 52, 65, 3380), ('F', 48, 65, 3120), ('G', 63, 65, 4095), ('H', 66, 65, 4290), ('I', 25, 65, 1625), ('J', 35, 65, 2275), ('K', 68, 65, 4420), ('L', 49, 65, 3185), ('M', 83, 65, 5395), ('N', 66, 65, 4290), ('O', 62, 65, 4030), ('P', 48, 65, 3120), ('R', 63, 65, 4095), ('S', 42, 65, 2730), ('T', 58, 65, 3770), ('U', 66, 65, 4290), ('X', 67, 65, 4355), ('Y', 67, 65, 4355), ('Z', 49, 65, 3185), ('g', 40, 61, 2440), ('q', 38, 58, 2204), ('p', 43, 57, 2451), ('y', 44, 57, 2508), ('t', 26, 56, 1456), ('r', 30, 47, 1410), ('v', 49, 47, 2303), ('w', 70, 47, 3290), ('a', 37, 46, 1702), ('c', 36, 46, 1656), ('e', 36, 46, 1656), ('m', 73, 46, 3358), ('n', 45, 46, 2070), ('o', 40, 46, 1840), ('s', 30, 46, 1380), ('u', 45, 46, 2070), ('x', 48, 46, 2208), ('z', 38, 46, 1748)]