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[Domande d'esame]Telerilevamento


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Questa discussione ha avuto 9 risposta/e

#1
LeoVa

LeoVa

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Esame svolto coi Prof. Longo e Picone.

- Presentazione del progetto, ogni membro del gruppo ha discusso la parte di cui si è occupato

Fra le varie domande ricordo:
- Principal Component Analisys
- Visione obliqua nei radar, perché è necessaria ed i problemi che comporta
- Interferometria radar SAR, sia across-track che differenziale
- Tecniche di clustering, K-means
- Spectral ratioing
- Classificatori supervisionati, con particolare riferimento a quello a massima verosimiglianza.

Esame molto tranquillo, i prof fanno domande durante l presentazione del progetto.




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#2
c.digruttola

c.digruttola

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Discussione del progetto

Radar: risoluzione in range ed azimuth, antenna pattern

SAR: risoluzione in azimut, immagine con SAR

Trasformazione di immagine: Spectral ratioing, PCA

Training

K-means


Ho finito l'Università, sono admin a tempo perso. Per qualsiasi problema contattate un altro admin o l'associazione ​StudentIngegneria su Facebook o in lab T25/1 (vicino al laboratorio T25).

Carmine Di Gruttola


#3
nicklion

nicklion

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discussione del progetto con presentazione e qualche domanda inerente alla presentazione:

domande fatte ai membri del gruppo:

classificatore non supervisionato

tempo di visita e acquisizione immagini da satellite geostazionario ed in orbita polare

classificatore a massima verosomiglianza

risoluzione in azimuth per il SAR

trasformazioni di un'immagine

distorsioni radiometriche nei RADAR


Immagine inviata

#4
apisapia92

apisapia92

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Discussione del progetto

interferometri differenziale

classificatori non supervisionati

spectral rationing

modalità di scansione dei SAR

distorsioni geometriche dei radar

caratteristiche dei satelliti come orbite, swath e nadir

 

Esame molto tranquillo, generalmente due domande a persona



#5
qwerty1991

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Esame svolto,qualche mese fa col Prof.Longo,

dopo aver discusso con l'ing. Picone del progetto.

 

Le domande che mi sono state poste sono:

-Interferometria SAR differenziale e ragionamenti vari sulla variazione di fase 

      e distorsioni in azimuth ed in range;

-Definizione di orbita,swath  e tempo di rivisita.


Vaffanc**o Facebook,ha distrutto r0x...

 

Disco sucks


#6
lebron1992

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Esame appena sostenuto con il prof. Longo e l'ing. Vivone, gruppo di 2 persone, progetto sul Pansharpening.

- Presentazione (PowerPoint) del progetto realizzato, con domande/curiosità;
- Sensori multispettrali e differenze con i sensori ottici (modalità di scansione degli scanner across/along track e vantaggi/svantaggi)
- Cella di risoluzione radar (risoluzione in range ed azimut, con formule);
- SAR (concetto dell'apertura sintetica, con formula per la risoluzione in azimut, tempo lento e tempo veloce);
- Interferometria SAR (across track e differenziale, con concetto dei permanent scatters).

Esame durato il tempo della presentazione (30min circa) e dell'orale (15min circa in 2). Prof molto tranquillo, progetto molto importante ai fini del voto.
In bocca al lupo ai prossimi.



#7
Mikele

Mikele

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Buon giorno.
Discussione del progetto "classificazione supervisionata" con varie domande e curiosità.

Orale:
Interferometria, interferometria across track ed interferometria along track.

Ciao.

#8
mecca

mecca

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Orale molto veloce e tranquillo. Nel gruppo eravamo in due e l'orale è stato praticamente "condiviso".

Le domande sono state:

  • Indici ricavabili dalla matrice di confusione
  • Perche K-hat è generalmente più piccolo dell'overall accuracy e perché è più preciso
  • PCA e perché, in alcuni casi, riesce a migliorare i risultati delle classificazioni
  • Visto che l'immagini iperspettrali hanno bande molto correlate, perché si utilizzano?
  • Firme spettrali (collegata alla domanda precedente)
  • Descrizione veloce di interferometria across-track e differenziale 
  • Concetto di base-line nel caso di acquisizione in interferometria across-track


#9
bart

bart

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Discussione del progetto con qualche domanda inerente alla presentazione:

 

  • Distorsione nella ripresa radar
  • NDVI
  • Classificazione
  • Coefficiente di concordanza KHAT


#10
MindMineV

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