def rgb_to_gray_image(self):
    im = Image.open(self.im_name)
    im = im.convert('LA')
    return im

# editing pixels of image to white
def loop_over_image(self):
    im = Image.open(self.im_name)
    width, height = im.size
    # nested loop over all pixels of image
    temp = []
    for i in range(width):
        for j in range(height):
            temp.append((255,255,255))#append a tuple for the RGB channel values for each pixel

    image_out = Image.new(im.mode,im.size) #create a new image usig PIl
    image_out.putdata(temp) #use the temp list to create the image
    return image_out