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Objekterkennungsmodelle

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>Modell

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Einrichtung für MobilNet

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import numpy as np
import tensorflow as tf
from tensorflow import keras
from tensorflow.keras.layers import Dense, Activation
from tensorflow.keras.optimizers import Adam
from tensorflow.keras.metrics import categorical_crossentropy
from tensorflow.keras.preprocessing.image import ImageDataGenerator
from tensorflow.keras.preprocessing import image
from tensorflow.keras.models import Model
from tensorflow.keras.applications import imagenet_utils
from sklearn.metrics import confusion_matrix
import itertools
import os
import shutil
import random
import matplotlib.pyplot as plt
%matplotlib inline

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MovilNet laden

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mobile = tf.keras.applications.mobilenet.MobileNet()

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Routine zur Bildvorbereitung

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def prepare_image(file):
    img_path = 'data/MobileNet-samples/'
    img = image.load_img(img_path + file, target_size=(224,224))
    img_array = image.img_to_array(img)
    img_array_expanded_dims = np.expand_dims(img_array,axis=0)
    return tf.keras.applications.mobilenet.preprocess_input(img_array_expanded_dims)

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Bild anzeigen

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from IPython.display import Image
Image(filename='data/MobileNet-samples/1.PNG',width=300,height=200)

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Bild analysieren

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preprocessed_image = prepare_image('1.PNG')
predictions = mobile.predict(preprocessed_image)
results=imagenet_utils.decode_predictions(predictions)
results

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Wahrscheinlichste Objekt angeben

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assert results[0][0][1] == 'American_chameleon'

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