Add Flask web framework

.gitignore

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+*.pyc 
+venv

app.py

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+import random
+import string
+import os
+from flask import Flask, request, redirect, render_template, send_from_directory, jsonify
+from werkzeug.utils import secure_filename
+from PIL import Image, ImageFilter
+
+UPLOAD_FOLDER = './tmp'
+ALLOWED_EXTENSIONS = set(['pdf', 'png', 'jpg', 'jpeg'])
+
+app = Flask(__name__)
+app.config['UPLOAD_FOLDER'] = UPLOAD_FOLDER
+
+def allowed_file(filename):
+    return '.' in filename and \
+           filename.rsplit('.', 1)[1].lower() in ALLOWED_EXTENSIONS
+
+def file_extension(filename):
+    if '.' in filename:
+        return filename.rsplit('.', 1)[1].lower()
+    else:
+        return None
+
+def file_name_generator(size=10, chars=string.ascii_uppercase):
+    return ''.join(random.choice(chars) for _ in range(size))
+
+def color_generator():
+    return (random.randint(0, 255), random.randint(0, 255), random.randint(0, 255))
+
+@app.route('/')
+def index():
+	return render_template('index.html')
+
+@app.route('/uploads/<path:filename>')
+def uploaded_file(filename):
+    return send_from_directory(app.config['UPLOAD_FOLDER'], filename)
+
+@app.route('/_image_segmentation', methods=['POST'])
+def upload_file():
+    # check if the post request has the file part
+    if 'file' not in request.files:
+        flash('No file part')
+        return redirect(request.url)
+    file = request.files['file']
+    # if user does not select file, browser also
+    # submit a empty part without filename
+    if file.filename == '':
+        flash('No selected file')
+        return redirect(request.url)
+    if file and allowed_file(file.filename):
+        segments = []
+        original_image = secure_filename(file.filename)
+        extension = file_extension(original_image)
+        file.save(os.path.join(app.config['UPLOAD_FOLDER'], original_image))
+        # do segmentation, save images to temp folder
+        for i in xrange(5):
+            filename = file_name_generator() + '.' + extension
+            image = Image.new("RGB", (400, 400), color_generator())
+            image.save(os.path.join(app.config['UPLOAD_FOLDER'], filename))
+            segments.append(filename)
+        # return urls to segmented images
+        return render_template('_image_segmentation.html', original_image=original_image, segments=segments)
+
+@app.route('/_style_transfer', methods=['POST'])
+def style_transfer():
+    # parse what the user wants to do to each segment of the image
+    d = request.get_json()
+    # compute the final image
+    # for file, style in d.iteritems():
+    filename = file_name_generator() + '.jpg'
+    image = Image.new("RGB", (400, 400), color_generator())
+    image.save(os.path.join(app.config['UPLOAD_FOLDER'], filename))
+    return render_template('_style_transfer.html', new_image=filename)