October 11, 2013

Python Character Image Generator

By Mohammed Abualrob Code Snippets 1 Comment

I wanted to generate unicode character images with certain size, font and color. I ended up writing the code below. I thought of sharing the code as it might be useful for some people.

Image Font Generator Code

# -*- coding: utf-8 -*- 

#-------------------------------- Imports ------------------------------#

# Import python imaging libs
from PIL import Image
from PIL import ImageDraw
from PIL import ImageFont

# Import operating system lib
import os

# Import random generator
from random import randint

#-------------------------------- Cleanup ------------------------------#
    				
def Cleanup():    
    # Delete ds_store file
   	if os.path.isfile(font_dir + '.DS_Store'):
   		os.unlink(font_dir + '.DS_Store')
	
	# Delete all files from output directory
	for file in os.listdir(out_dir):
		file_path = os.path.join(out_dir, file)
		if os.path.isfile(file_path):
			os.unlink(file_path)
   	return

#--------------------------- Generate Characters -----------------------#

def GenerateCharacters():
	# Counter
	k = 1
	# Process the font files
	for dirname, dirnames, filenames in os.walk(font_dir):
		# For each font do
		for filename in filenames:
			# Get font full file path
			font_resource_file = os.path.join(dirname, filename)
		
			# For each character do
			for char in characters:
				# For each font size do
				for font_size in font_sizes:
				   if font_size > 0:
					# For each background color do
					for background_color in background_colors:
					   # Convert the character into unicode
					   character = unicode(char, 'utf-8')
			
					   # Create character image : 
					   # Grayscale, image size, background color
					   char_image = Image.new('L', (image_size, \
					   image_size), background_color)
			
					   # Draw character image
					   draw = ImageDraw.Draw(char_image)
			
					   # Specify font : Resource file, font size
					   font = \
					   ImageFont.truetype(font_resource_file, font_size)
			
					   # Get character width and height
					   (font_width, font_height) = font.getsize(character)
			
					   # Calculate x position
					   x = (image_size - font_width)/2
			
					   # Calculate y position
					   y = (image_size - font_height)/2
			
					   # Draw text : Position, String, 
					   # Options = Fill color, Font
					   draw.text((x, y), character, (245- \
					   background_color) + randint(0, 10) , font=font)
					
					   # Final file name    				
					   file_name = out_dir + str(k) + '_' + \
					   filename + '_fs_' + \
					   str(font_size) + '_bc_' + \
					   str(background_color) + '.' + \
					   character + '.png'
			
					   # Save image
					   char_image.save(file_name)
					
					   # Print character file name
					   print file_name;
					
					   # Increment counter
					   k = k + 1
	return

#------------------------------- Input and Output ------------------------#

# Directory containing fonts
font_dir = '/path/to/fonts/dir/'

# Output
out_dir = '/path/to/output/dir'

#---------------------------------- Characters ---------------------------#

# Numbers
numbers = ['0', '1', '2']

# Small letters
small_letters = ['a', 'b', 'c']

# Capital letters
capital_letters = ["A", 'B', 'C']
    	
# Select characters
characters = numbers + small_letters + capital_letters

#---------------------------------- Colors -------------------------------#

# Background color
white_colors = (215, 225, 235, 245)
black_colors = (0, 10, 20, 30)
gray_colors = (135, 145, 155)

background_colors = white_colors + black_colors + gray_colors
    	
#----------------------------------- Sizes -------------------------------#

# Character sizes
small_sizes = (8, 12, 16)
medium_sizes = (20, 24, 28)
large_sizes = (32, 36, 40)

font_sizes = small_sizes + medium_sizes + large_sizes
    	
# Image size
image_size = 64

#----------------------------------- Main --------------------------------#

# Do cleanup
Cleanup()

# Generate characters
GenerateCharacters()

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

# -*- coding: utf-8 -*-

#-------------------------------- Imports ------------------------------#

# Import python imaging libs

from PIL import Image

from PIL import ImageDraw

from PIL import ImageFont

# Import operating system lib

import os

# Import random generator

from random import randint

#-------------------------------- Cleanup ------------------------------#

def Cleanup():

# Delete ds_store file

if os.path.isfile(font_dir + '.DS_Store'):

os.unlink(font_dir + '.DS_Store')

# Delete all files from output directory

for file in os.listdir(out_dir):

file_path = os.path.join(out_dir, file)

if os.path.isfile(file_path):

os.unlink(file_path)

return

#--------------------------- Generate Characters -----------------------#

def GenerateCharacters():

# Counter

k = 1

# Process the font files

for dirname, dirnames, filenames in os.walk(font_dir):

# For each font do

for filename in filenames:

# Get font full file path

font_resource_file = os.path.join(dirname, filename)

# For each character do

for char in characters:

# For each font size do

for font_size in font_sizes:

if font_size > 0:

# For each background color do

for background_color in background_colors:

# Convert the character into unicode

character = unicode(char, 'utf-8')

# Create character image :

# Grayscale, image size, background color

char_image = Image.new('L', (image_size, \

image_size), background_color)

# Draw character image

draw = ImageDraw.Draw(char_image)

# Specify font : Resource file, font size

font = \

ImageFont.truetype(font_resource_file, font_size)

# Get character width and height

(font_width, font_height) = font.getsize(character)

# Calculate x position

x = (image_size - font_width)/2

# Calculate y position

y = (image_size - font_height)/2

# Draw text : Position, String,

# Options = Fill color, Font

draw.text((x, y), character, (245- \

background_color) + randint(0, 10) , font=font)

# Final file name

file_name = out_dir + str(k) + '_' + \

filename + '_fs_' + \

str(font_size) + '_bc_' + \

str(background_color) + '.' + \

character + '.png'

# Save image

char_image.save(file_name)

# Print character file name

print file_name;

# Increment counter

k = k + 1

return

#------------------------------- Input and Output ------------------------#

# Directory containing fonts

font_dir = '/path/to/fonts/dir/'

# Output

out_dir = '/path/to/output/dir'

#---------------------------------- Characters ---------------------------#

# Numbers

numbers = ['0', '1', '2']

# Small letters

small_letters = ['a', 'b', 'c']

# Capital letters

capital_letters = ["A", 'B', 'C']

# Select characters

characters = numbers + small_letters + capital_letters

#---------------------------------- Colors -------------------------------#

# Background color

white_colors = (215, 225, 235, 245)

black_colors = (0, 10, 20, 30)

gray_colors = (135, 145, 155)

background_colors = white_colors + black_colors + gray_colors

#----------------------------------- Sizes -------------------------------#

# Character sizes

small_sizes = (8, 12, 16)

medium_sizes = (20, 24, 28)

large_sizes = (32, 36, 40)

font_sizes = small_sizes + medium_sizes + large_sizes

# Image size

image_size = 64

#----------------------------------- Main --------------------------------#

# Do cleanup

Cleanup()

# Generate characters

GenerateCharacters()

8 BIT AVENUE

Python Character Image Generator

More from my site

About Author

Mohammed Abualrob

Add a Comment