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Il valore (nutrizionale) dei dati
1
Dario Allegra
Big Data For You – La computer vision nell’era dei big data
Computer Vision
2
OBIETTIVO
Simulare un sistema
visivo (umano)
COSA CI SERVE?
modulo di acquisizione
modulo di comprensione
Big Data For You – La computer vision nell’era dei big data
Computer Vision
3
DOG
modulo di acquisizione modulo di comprensione
DOG
naturale
artificiale
Big Data For You – La computer vision nell’era dei big data
Computer Vision
4
DOG
rappresentazione modello matematico
1970-1985
AI
Big Data For You – La computer vision nell’era dei big data
Computer Vision
5
DOG
rappresentazione modello matematico
1986-2010
AI
DATI+
Big Data For You – La computer vision nell’era dei big data
Computer Vision
6
DOG
rappresentazione modello matematico
2011-OGGI
DATI+
AI
DATI+
Big Data For You – La computer vision nell’era dei big data
Computer Vision - Dati
7
DATI
Food understanding
8
Calorie?
Ingredienti?
?
Volume?
Food understanding
● Monitoraggio diete
● Allergie
● Diabete
● Obesità
● … 9
Food VS Non-Food
Riconoscimento e
Classificazione
Stima del volume
Problemi da affrontareMotivazioni
vs
?
Food understanding - Dataset
10
Food VS Non-Food
11
4805 immagini Food
8005 immagini Non-Food
Dove
prendo i
DATI?
Food VS Non-Food
91.99% con features CNN
12
Uso di One-Class Classification
Big Data For You – La computer vision nell’era dei big data
Food VS Non-Food
13
Non-Food classificato come food
Food classificato come non food
Big Data For You – La computer vision nell’era dei big data
Retrieval and Classification
Che cibo ho davanti?
Che tipo di portata? Primo? Secondo?
Come posso mangiarlo?
87.44% per retrieval
86.27% per raccomandazione posate
92.60% per classificazione piatto
14
4754 immagini su 1200 classi
Stima del volume e dei valori nutrizionali
● Necessità di un dataset 3D
● Multi-Task Learning 15
Errore medio nella stima: 19.10%
Stima del volume – Profondità
16
Stima del volume – Segmentazione semantica
17
Stima del volume e segmentazione – Imparo da…
18
RGB DSensore di profondità
Limiti
● Ingredienti invisibili?
● Variabilità?
19
Big Data For You – La computer vision nell’era dei big data
Limiti
● Ingredienti invisibili?
● Variabilità?
20
Big Data For You – La computer vision nell’era dei big data
Limiti
● Ingredienti invisibili?
● Variabilità?
21
Big Data For You – La computer vision nell’era dei big data
Limiti
● Ingredienti invisibili?
● Variabilità?
22
Big Data For You – La computer vision nell’era dei big data
Lavori futuri
23
Futuro
● Dati 3D ?
● Contesto?
● Altri sensori?
Big Data For You – La computer vision nell’era dei big data
http://iplab.dmi.unict.it/UNICT-FD889/
24
Grazie!
25
Dario Allegra – allegra@unict.it

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Il valore (nutrizionale) dei dati