Image Processing with PILLOW

exemplo.py

import tkinter as tk
from PIL import Image, ImageDraw, ImageTk

im = Image.new('RGB', (256, 256))
draw = ImageDraw.Draw(im)

width = 256
height = 256

cor1 = (255, 0, 0)
cor2 = (0, 0, 255)

even = True

inicio = 0
tamanho = 16

for x1 in range(inicio, height, tamanho):
    even = not even
    for y1 in range(inicio, width, tamanho):
        x2 = x1+tamanho
        y2 = y1+tamanho
        coord = (x1, y1, x2, y2)
        even = not even
        if even:
            draw.rectangle(coord, fill=cor1)
        else:
            draw.rectangle(coord, fill=cor2)

im.save("chessboard.png")

# Initializing tkinter
root = tk.Tk()
root.title('Shot Viewer')
w, h, x, y = 256, 256, 0, 0
root.geometry("%dx%d+%d+%d" % (w, h, x, y))

# Loading Image on tkinter
photo = tk.PhotoImage(file="chessboard.png")
photo_label = tk.Label(image=photo)
photo_label.grid()
photo_label.image = photo

root.mainloop()

loader.py

import tkinter as tk
from tkinter import filedialog
from PIL import Image, ImageDraw


filetypes = (
        ("PNG", "*.png"),
        ("JPEG", "*.jpg"),
        ("BMP", "*.bmp")
)

root = tk.Tk()
image_name = tk.filedialog.askopenfilename(filetypes=filetypes)
im = Image.open(image_name)
width, height = im.size

if __name__ == '__main__':
    from negative import negative
    negative(im)

root.title('Shot Viewer')
w, h, x, y = width, height, 0, 0
root.geometry("%dx%d+%d+%d" % (w, h, x, y))

# Loading Image on tkinter
photo = tk.PhotoImage(file=image_name)
photo_label = tk.Label(image=photo)
photo_label.grid()
photo_label.image = photo

root.mainloop()

negative.py

"""Negative."""


def negative(img):
    pix = img.load()
    width, height = img.size
    print(img.mode)
    for x in range(width):
        for y in range(height):
            color = pix[x, y]
            if img.mode == 'RGB':
                r, g, b = color
                new_color = (255 - r, 255 - g, 255 - b)
            elif img.mode == 'RGBA':
                r, g, b, a = color
                new_color = (255 - r, 255 - g, 255 - b, a)
            pix[x, y] = new_color
    img.save(img.filename)