functions.py

# Mariana, Matthew, and Alfredo
from PIL import Image
import os


def Grayscale(p):
    image = p
    im = Image.open(image)
    if im.mode != 'RGB':
        im = im.convert('RGB')
    g_list = [(
        int((p[0] * 299 + p[1] * 587 + p[2] * 114) // 1000),
        int((p[0] * 299 + p[1] * 587 + p[2] * 114) // 1000),
        int((p[0] * 299 + p[1] * 587 + p[2] * 114) // 1000)
        ) for p in im.getdata()]
    im.putdata(g_list)
    output_path = os.path.join("static/images", "grayscaleEdit.jpg")
    im.save(output_path)
    return output_path

def sepia(p):
    if p[0] < 63:
        r, g, b = int(p[0] * 1.1), p[1], int(p[2] * 0.9)
    elif 63 <= p[0] <= 192:
        r, g, b = int(p[0] * 1.15), p[1], int(p[2] * 0.85)
    else:
        r = int(p[0] * 1.08)
        g, b = p[1], int(p[2] * 0.5)
      
    return r, g, b

def Sepia(image_path):
    im = Image.open(image_path)
    if im.mode != 'RGB':
        im = im.convert('RGB')
    s_list = [sepia(pixel) for pixel in im.getdata()]
    im.putdata(s_list)
    output_path = os.path.join("static/images", "sepiaEdit.jpg")
    im.save(output_path)
    return output_path

def Negative(image_path):
    im = Image.open(image_path)
    if im.mode != 'RGB':
        im = im.convert('RGB')
    n_list = [(255 - p[0], 255 - p[1], 255 - p[2]) for p in im.getdata()]
    im.putdata(n_list)
    output_path = os.path.join("static/images", "NegativeEdit.jpg")
    im.save(output_path)
    return output_path

def Thumbnail(image_path):
    im = Image.open(image_path)
    if im.mode != 'RGB':
        im = im.convert('RGB')
    trgt = im.resize((252, 253))
    output_path = os.path.join("static/images", "thumbnailEdit.jpg")
    trgt.save(output_path)
    return output_path