THE HYPERSPECTRAL IMAGING APPROACH

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ACTIONS C.1&C.2 - Process and product monitoring based on hyperspectral imaging HyperSpectral Imaging (HSI) is an innovative technology developed in recent years that combines the advantages of spectroscopy and imaging techniques. In the last years there was a strong increase in applications including off-line / on-line inspection at industrial scale in different sectors. Image source: www.perception-park.com RESAFE Project Workshop Faenza (Italy) December 14, 2015 2

Transcript of THE HYPERSPECTRAL IMAGING APPROACH

  • THE HYPERSPECTRAL IMAGING APPROACH

    Giuseppe Bonifazi

    Workshop

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  • ACTIONS C.1&C.2 - Process and product monitoringbased on hyperspectral imagingHyperSpectral Imaging (HSI) is an innovative technology developed in recent years that combines the advantages of spectroscopy and imaging techniques.

    In the last years there was a strong increase in applications including off-line / on-line inspection at industrial scale in different sectors.Image source: www.perception-park.comRESAFE ProjectWorkshopFaenza (Italy)December 14, 2015

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  • All individual spatial and spectral images could be picked up from the hypercube and the spectrum of each pixel of the image in a specific position can be extractedOne spectral image of n pixels for all the investigated wavelengths ()Spectral signature of a single pixelACTIONS C.1&C.2 - Process and product monitoringbased on hyperspectral imagingRESAFE ProjectWorkshopFaenza (Italy)December 14, 2015

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  • Hyperspectral Imaging CharacterizationSISUChema XL Chemical Imaging WorkstationOperation mode:push-broomSpectral range:SWIR: 1000-2500nmSpectral sampling and (resolution)6.3nmActive pixel:320 (spatial) x 240 (spectral) pixelsACTIONS C.1&C.2 The selected HSI devicesRESAFE ProjectWorkshopFaenza (Italy)December 14, 2015

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  • ACTIONS C.1&C.2 The selected HSI devicesHyperspectral Imaging CharacterizationHyperspectral architecture Specim ImSpectorTM N17EOperation mode:push-broomSpectral range:NIR: 1000-1700nmSpectral sampling and (resolution)5nmActive pixel:320 (spatial) x 240 (spectral) pixelsHyperspectral architecture Specim ImSpectorTM V10Operation mode:push-broomSpectral range:VIS-NIR: 400-1000 nmSpectral sampling and (resolution)5 nmActive pixel:320 (spatial) x 240 (spectral) pixelsRESAFE ProjectWorkshopFaenza (Italy)December 14, 2015

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  • ACTION C.1: HyperSpectral Imaging (HSI) CharacterizationActions C.1-C.2 - Sample AcquisitionRESAFE ProjectWorkshopFaenza (Italy)December 14, 2015

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  • Actions C.1-C.2: Hyperspectral data processingSpectral data have been analysed using the PLS_Toolbox 7. 0 (Eigenvector Research Inc.) running inside Matlab environment (version 7.12.0).Spectra preprocessingPCA applied for data explorationPLS applied for spectra correlation with curing time and different measured chemical parametersRESAFE ProjectWorkshopFaenza (Italy)December 14, 2015

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  • Actions C.1&C.2 Results on raw materials from the different countries (Action B.1)Step 1: Waste raw materials collected from Italy, Spain and Cyprus were utilized to train the HSI system to correctly classify them.

    Step 2: Hyperspectral images of different organic waste were elaborated using the 3 different HSI devices.

    Step 3: Spectra preprocessing and PCA classification model were applied for the classification of different organic matrices.CY-UOW SampleIT-FOR Sample

    RESAFE ProjectWorkshopFaenza (Italy)December 14, 2015

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  • Raw materials: Italian samples Reflectance spectra (1000-1700 nm)Actions C.1&C.2 Results on raw materials from the different countries (Action B.1)RESAFE ProjectWorkshopFaenza (Italy)December 14, 2015

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  • Pretreated Hyperspectal images of a) IT-BC; b) IT-FOR and c) IT-UOW

    a)b)c)

    a) IT-BCb) IT-FORc) IT-UOWa)b)c)Raw Hyperspectal images of a) IT-BC; b) IT-FOR and c) IT-UOWApplied pretreatment:SNVMean Center

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    c)Actions C.1&C.2 Results on raw materials from the different countries (Action B.1) Italian Raw MaterialsRESAFE ProjectWorkshopFaenza (Italy)December 14, 2015

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  • Raw materials: FOR samples Reflectance spectra (1000-1700 nm)CY-FOR_V2IT-FORES-FORActions C.1&C.2 Results on raw materials from the different countries (Action B.1) RESAFE ProjectWorkshopFaenza (Italy)December 14, 2015

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  • PCA score plots (PC1 vs. PC2) related to the different FOR samples coming from Italy, Spain and Cyprus acquired in the NIR (1000-1650 nm) wavelength field.Actions C.1&C.2 Results on raw materials from the different countries (Action B.1) RESAFE ProjectWorkshopFaenza (Italy)December 14, 2015

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  • Italian samples at different curing timesAverage reflectance spectra of the different Italian samples acquired in the NIR (1000-1650 nm) wavelength fieldActions C.1&C.2 Results from lab-scale plantsin the different countries (Action B.2) RESAFE ProjectWorkshopFaenza (Italy)December 14, 2015

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  • Italian samples at different curing timesPCA score plots (PC1 vs. PC2) related to the different Italian samples (IT-UFVB-5050-T0; IT-UFVB-5050-T20; IT-UFVB-5050-T40 and IT-UFVB-5050-T60) acquired in the NIR (1000-1650 nm) wavelength fieldActions C.1&C.2 Results from lab-scale plantsin the different countries (Action B.2) RESAFE ProjectWorkshopFaenza (Italy)December 14, 2015

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  • t = 0 dayst = 20 dayst = 40 dayst = 60 daysProcess Monitoring by HSIPLS for different curing times (Italian samples)Actions C.1&C.2 Results from lab-scale plantsin the different countries (Action B.2) RESAFE ProjectWorkshopFaenza (Italy)December 14, 2015

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  • Product Monitoring by HSIPrediction of chemical parameters (Italian samples)Actions C.1&C.2 Results from lab-scale plantsin the different countries (Action B.2) Humidity (%)Phosphatase (mol INTF g-1 h-1)RESAFE ProjectWorkshopFaenza (Italy)December 14, 2015

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  • Product Monitoring by HSIPrediction of chemical parameters (Italian samples)Actions C.1&C.2 Results from lab-scale plantsin the different countries (Action B.2) Soluble Organic Nitrogen (ppm)Soluble Organic Carbon (%)RESAFE ProjectWorkshopFaenza (Italy)December 14, 2015

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  • Product Monitoring by HSIPCA (Spanish samples)Actions C.1&C.2 Results from pilot-scale plantsin the different countries (Action B.3) Source SampleES-UFVB-6040 T90Sample HypercubePCA: background removalRESAFE ProjectWorkshopFaenza (Italy)December 14, 2015

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  • Process Monitoring by HSIRaw and preprocessed spectra at t = 0 and t = 90 days (Spanish samples)Actions C.1&C.2 Results from pilot-scale plantsin the different countries (Action B.3) Preprocessing applied: Smoothing (window 11)+ Second derivative (window 15)+ Mean centerAverage raw spectraRESAFE ProjectWorkshopFaenza (Italy)December 14, 2015

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  • Process Monitoring by HSIPCA and Loadings (Spanish samples)Actions C.1&C.2 Results from pilot-scale plantsin the different countries (Action B.3) RESAFE ProjectWorkshopFaenza (Italy)December 14, 2015

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  • Actions C.1&C.2 Results from pilot-scale plantsin the different countries (Action B.3) Product Monitoring by HSIPrediction of chemical parameters: Soluble Organic Nitrogen (%)Italian samplesSpanish samplesRESAFE ProjectWorkshopFaenza (Italy)December 14, 2015

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  • Actions C.1&C.2 Results from pilot-scale plantsin the different countries (Action B.3) Product Monitoring by HSIPrediction of chemical parameters: Soluble Organic Carbon (%)Italian samplesSpanish samplesRESAFE ProjectWorkshopFaenza (Italy)December 14, 2015

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  • Actions C.1&C.2 Results from pilot-scale plantsin the different countries (Action B.3) Product Monitoring by HSIPrediction of chemical parameters: EC (mS/cm)Italian samplesSpanish samplesRESAFE ProjectWorkshopFaenza (Italy)December 14, 2015

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  • RESAFE ProjectWorkshopFaenza (Italy)December 14, 2015Actions C.3 Results from agriculture application in Italy (Action B.4)

    Product Monitoring by HSIPCA (Italian samples)- Barley

  • RESAFE ProjectWorkshopFaenza (Italy)December 14, 2015Actions C.3 Results from agriculture application in Italy (Action B.4)

    Process Monitoring by HSIRaw and preprocessed spectraPreprocessing applied: Smoothing (window 15)+ First derivative (window 15)+ Mean centerAverage raw spectra

  • RESAFE ProjectWorkshopFaenza (Italy)December 14, 2015Actions C.3 Results from agriculture application in Italy (Action B.4)

    PCA score plots (PC1 vs. PC2) related to Barley samples acquired in the NIR (1000-1650 nm) wavelength field.

  • RESAFE ProjectWorkshopFaenza (Italy)December 14, 2015Actions C.4 Results from agriculture application in Spain (Action B.5)

    Product Monitoring by HSIPCA (Spanish samples)- Potato

  • RESAFE ProjectWorkshopFaenza (Italy)December 14, 2015Actions C.4 Results from agriculture application in Spain (Action B.5)

    Process Monitoring by HSIRaw and preprocessed spectraPreprocessing applied: Smoothing (window 15)+ Second derivative (window 15)+ Mean centerAverage raw spectra

  • RESAFE ProjectWorkshopFaenza (Italy)December 14, 2015Actions C.4 Results from agriculture application in Spain (Action B.5)

    PCA score plots (PC1 vs. PC2) related to Potato samples acquired in the NIR (1000-1650 nm) wavelength field.

  • RESAFE ProjectWorkshopFaenza (Italy)December 14, 2015Actions C.5 Results from agriculture application in Cyprus (Action B.6)

    - MelonProduct Monitoring by HSIPCA (Cypriot samples)

  • RESAFE ProjectWorkshopFaenza (Italy)December 14, 2015Actions C.5 Results from agriculture application in Cyprus (Action B.6)

    Preprocessing applied: Smoothing (window 11)+ Second derivative (window 19)+ Mean centerAverage raw spectraProcess Monitoring by HSIRaw and preprocessed spectra

  • RESAFE ProjectWorkshopFaenza (Italy)December 14, 2015Actions C.5 Results from agriculture application in Cyprus (Action B.6)

    PCA score plots (PC1 vs. PC2) related to Potato samples acquired in the NIR (1000-1650 nm) wavelength field.

  • ConclusionsActions B.1&C.1-C.2The HSI approach allowed to outline the difference e