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# Packages Imports
import base64
import json
from subprocess import call
import numpy as np
from flask import Flask, flash, redirect, request, send_from_directory, url_for
from keras.models import load_model
from keras.preprocessing import image
from werkzeug.utils import secure_filename
import cv2
from places_utils import preprocess_input
# define server app and model
app = Flask(__name__)
model = None
# End-point to upload an image and call predict class for it
# it upload an image encoded to base64. image string is place in request headers with key of 'file'
@app.route('/upload', methods=['GET', 'POST'])
def upload():
''' uploads image and call predict for it.'''
if request.method == 'POST':
# file = request.json['headers']['file']
file = request.headers.get('file')
imgdata = base64.b64decode(file)
filename = 'imageToPredict.jpg'
with open('uploads/'+filename, 'wb') as f:
f = predict('uploads/imageToPredict.jpg')
return f
'''TODO: Use image without saving in disk'''
# def data_uri_to_cv2_img(encoded_data):
# # encoded_data = uri.split(',')[1]
# imgdata = base64.b64decode(encoded_data)
# # nparr = np.fromstring(imgdata, np.uint8)
# nparr = np.asarray(imgdata, dtype=np.uint8)
# img = cv2.imdecode(nparr, cv2.IMREAD_COLOR)
# print(type(img))
# cv2.imshow('image', img)
# # return img
labels = ['Architect Campus', 'Buffet',
'Computer Campus', 'Culture house', 'Field', 'Self']
# End-point to predict last uploded image
def predict(imgaddr):
''' predicts the last uploaded image an returns a string at last containing classes probability.'''
global model
img = cv2.imread(imgaddr)
h, w, c = img.shape
if w > h: # rotate image if it's in wrong orientation
# rotation is done by ImageMagick so it sohuld be installed
call(['mogrify', '-rotate', '90', 'uploads/imageToPredict.jpg'])
img = image.load_img(imgaddr, target_size=(108, 192))
x = image.img_to_array(img)
x = np.expand_dims(x, axis=0)
x = preprocess_input(x)
if not model:
print('------- loading model')
model = load_model('PF-50-fixed 24-3-97.h5')
features = model.predict(x)
predicts = []
for i, p in enumerate(features[0]):
item = '%s Probability: %f' % (labels[i], p)
predicts_string = '\n'.join(predicts)
return predicts_string
# end-point to get the last image sent to predict
def uploaded_file():
# images sent overwrite each other so there is only one image to get
return send_from_directory('uploads/', 'imageToPredict.jpg')
# End-point to predict again last uploded image
def predict_again():
f = predict('uploads/imageToPredict.jpg')
return f
if __name__ == '__main__':
app.secret_key = 'abcakjlc-b@weubi_2b3!2@'
app.config['SESSION_TYPE'] = 'filesystem''', port=8080)
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