def default(self):
self.ids.image.source = "colors.png"
self.im = Image.open("colors.png").convert(
"RGB"
) # Always convert to RGB for compatibility with other modifications
self.image = Ima(source="colors.png")
self.route = "colors.png"
def halftone(self, value):
if value:
sample = 30
channel = self.im.split()[2]
# New, single 8-bit channel image for halftoning
halftoned = Image.new('L', (channel.width, channel.height))
# sets the draw command
draw = ImageDraw.Draw(halftoned)
# goes from 0 to width of image with step size of 30 (sample size -- basically in a grid of width/30)
for x in range(0, channel.width, sample):
for y in range(0, channel.height, sample):
# makes a new box that takes a sample sized (30x30) square of the original image's B channel
box = channel.crop((x, y, x + sample, y + sample))
# sets the stat command
stat = ImageStat.Stat(box)
# Scales diameter of the halftoning circle (0-sample=30) based on the 0-255 value of the L (only) channel which indicates pixel brightness out of 255 to make it a value from 0-1
diameter = stat.mean[0] * sample / 255
# draws a new halftoned circle with size based on the diameter of the halftoning circle
draw.ellipse((x, y, x + diameter, y + diameter), fill=255)
# saves new halftoned image using saver function
self.saver(halftoned)
# IF Halftoning is DESELECTED: return to original state
else:
self.ids.image.source = self.route
self.im = Image.open(self.route)
self.image = Ima(source=self.route)
self.checkIn()
def saver(self, result):
result.convert("RGB").save("result.jpg")
self.im = Image.open("result.jpg")
self.ids.image.source = self.route
self.image = Ima(source="result.jpg")
self.image.reload()
self.ids.image.source = "result.jpg"
self.show()
def load(self, path, filename):
self.ids.image.source = filename[0]
self.im = Image.open(filename[0]).convert("RGB")
self.image = Ima(source=filename[0])
self.route = filename[
0] # self.route is used when user wants to return to original image.
self.image.reload()
self.checkIn()
def bwConvert(self, value):
if value:
self.saver(self.im.convert("LA"))
else:
self.ids.image.source = self.route
self.im = Image.open(self.route)
self.image = Ima(source=self.route)
self.checkIn()
def solarize(self, value):
if value:
self.saver(ImageOps.solarize(self.im, 95))
else:
self.ids.image.source = self.route
self.im = Image.open(self.route)
self.image = Ima(source=self.route)
self.checkIn()
def show(self):
if self.ids.result.state == 'down':
self.ids.image.source = self.route
self.image = Ima(source="result.jpg")
# it is necessary to reload an image after its modification because Kivy keeps a local cache of the image
self.image.reload()
self.ids.image.source = "result.jpg"
else:
self.ids.image.source = self.route