Imaginis Multispectral e Hyperspectral
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Questions and Answers

Quale distorsiones in imagines digital es causate per un distribution incorrecte de intensitate?

  • Distorsiones spatial
  • Distorsiones radiometric (correct)
  • Distorsiones geometric
  • Distorsiones temporale

    • Quale es un resultato possibile de un fault del sensor interne del camera?

  • Aumento de claritate
  • Reducition de resolution
  • Mejoramento de color
  • Distorsiones radiometric (correct)

    • Como pote le distorsiones spatial manifestar se in un imagine?

  • Per un aumento del contrasto
  • Per un cambio in position e direction (correct)
  • Per una alteration del luminositate
  • Per un errores in distribution de color

    • Quale factor non causa distorsiones radiometric?

    <p>Movimento del camera</p> Signup and view all the answers

    Quale statement super le formation de imagines in le oculo human e le camera es ver?

    <p>Le oculo human varia le forma del lentile pro alterare le focal.</p> Signup and view all the answers

    Quo es lo que determina le imagine final capte in relation al imagine hyperspectral?

    <p>Le illumination, reflectantia, e sensibilitate del sensor</p> Signup and view all the answers

    Pourquoi le inks hyperspectral es difficil a distinguer visualmente?

    <p>Ils es omnes simile in aspecto</p> Signup and view all the answers

    Quo es le utilitate de t-SNE in le context de imagine hyperspectral?

    <p>Segregar le inks in different classes</p> Signup and view all the answers

    Quo es le range de longitud de onda pro le imagine hyperspectral mencionate?

    <p>400 nm - 1000 nm</p> Signup and view all the answers

    Quo es le resultato del experimento de segmentazione usando RGB solmente?

    <p>Segmentation has failed</p> Signup and view all the answers

    Quale methodo es mencionate pro la reducio de dimension del imagine hyperspectral?

    <p>t-SNE e PCA</p> Signup and view all the answers

    Quo indica le 'ground truth' in relation al imagine hyperspectral?

    <p>Le valor real del inks</p> Signup and view all the answers

    Quo es le maximum numero de bandas mentionate pro le imagine hyperspectral?

    <p>186</p> Signup and view all the answers

    Qual es le motive pro usar un systema de coordination homogeneous?

    <p>Permitter un transformation composite in un modo efficiente.</p> Signup and view all the answers

    Quo es le resultato de un translation in le coordinate 𝑊𝑐?

    <p>𝑋’ = 𝑋 + 𝑇𝑥, 𝑌’ = 𝑌 + 𝑇𝑦</p> Signup and view all the answers

    Quo es le definition de dilatation in le context de transformationes geometric?

    <p>Un transformation qui altera le forma e le dimension de un object.</p> Signup and view all the answers

    Quo es le effecto de un rotation in le systema de coordination?

    <p>Modificar le angulo de un object respecta un puncto de referentia.</p> Signup and view all the answers

    Quo es un necessitate que le systema de coordination homogeneous intenta resolver?

    <p>Mantenere un representation uniforme pro diversas configurationes.</p> Signup and view all the answers

    Qual es le secvente correcte de processamento del imagen in le oculo?

    <p>Le signal es generate per le retina.</p> Signup and view all the answers

    Quid describe le Mach Bands?

    <p>Le perceptive non es sencillmente relative al intensitate actual.</p> Signup and view all the answers

    Quid indica le fenomeno de contrasto simultane?

    <p>Un region pare plus brillante si es vicino a un justo contrasto.</p> Signup and view all the answers

    Qual es un facto curiose super le oculo umano?

    <p>Le oculo compilate info non existite.</p> Signup and view all the answers

    Que indica le conceptemento de 'Constancia de Color'?

    <p>Le perception de colores pote variar a base del conditios de illumination.</p> Signup and view all the answers

    Qual es le principal fin de le vision computatorial in relation al oculo humano?

    <p>Replicare le imagines simile a que vede le human.</p> Signup and view all the answers

    Que pote le oculo humano remplazar in relation al camera digital?

    <p>Le captation de lumini.</p> Signup and view all the answers

    Quid caracteriza le processus de perception visual in le cerebro?

    <p>Illo transforma signales biologic in perceptiones.</p> Signup and view all the answers

    Quante colores pote esser reproduce per omnes systemas?

    <p>216 colores</p> Signup and view all the answers

    Qual es le function del componente 𝑙 ∗ in le spazio de colores CIELAB?

    <p>Representar le claritate</p> Signup and view all the answers

    Qual de le sequente es un sistema de colores mentionate?

    <p>HSI</p> Signup and view all the answers

    Qual es le significa de HSI in relation al colore?

    <p>Hue, Saturation, Intensity</p> Signup and view all the answers

    Qual sistema de colores usa le componentes 𝑎 ∗ e 𝑏 ∗?

    <p>CIELAB</p> Signup and view all the answers

    Qual de le sequente non es un systema de colores?

    <p>QCAD</p> Signup and view all the answers

    Qual es un causa per le qual nos non comprende tote le aspectos del captura de colore human?

    <p>Le complexitate del vision human</p> Signup and view all the answers

    Qual est le rolo de le coefficient de reflectantia 𝜌 in le captura de colore?

    <p>Il afecta le perception del colore</p> Signup and view all the answers

    Study Notes

    Imaginis Multispectral e Hyperspectral

    • Illumination (𝐸), reflectantia (𝜌), e sensitivitá del sensor determina le imagines captate.
    • Inks hyperepectral es visualmente similar, difficile a distinguer; visualisation hyperepectral pote differenciar los.
    • Speedando a 186 bandas in imagines hyperepectral, le longitud de onda va de 400 nm a 1000 nm, con un intervaluo de 3.18 nm.

    Dimensionality Reduction e Clustering

    • Segmentatio, usando solmente RGB, non successa; segmentatio hyperepectral usando K-Means Clustering successa.
    • Diverses methodos de redução de dimension, como PCA e t-SNE, utilisa pro analizar datos.

    Distortiones in Imaginis Digital

    • Distortiones geometric: resulta de cambio in position e direction, potes ocurrer per movement de persona o falte del sensor.
    • Distortiones radiometric: incorrecte distribution de intensitate causate per condiciones ambientale differentes (ex., haze).

    Formation de Imagini

    • Camera: lense con focal fixe; focus variando distancia inter lense e plano de imaging.
    • Oculo humano: distancia inter lense e retina fixe, focalisation varia mediante forma del lense; intensitate luminose transforma in signales biologic.

    Perception Visual in le Cerebro

    • Le immagine es un perception basate super le processamento cerebral.
    • Adaptation a luminositate: intensitate percepta non es un function simple del intensitate actual (ex., Mach Bands, Simultaneous Contrast).

    Propriedades Curiose del Oculo Human

    • Le oculo complemente info non existente e percipe propriedades geometric mal.
    • Color constance: perceptos colors pote apparer similar in differente contextos de illumination.

    Transformations Geometric in Imaginis

    • Transformationes geometrices utiliza multiplication de matrices pro translation, scala e rotation.
    • Homogene representation necessaria pro coordinatas uniforme e transformationes composite.

    Espacios de Color

    • Espacio CIELAB simula le response nonlinear del oculos con componentes 𝐿, 𝑎, e 𝑏.
    • Existente multe systemas de color: CIEXYZ, CIELAB, RGB variantes, YIQ, YUV, YCbCr; systemas suitable pro differente tareas.

    Imagin Digital vs Percepta

    • SPD (Distribution Spectral de Illuminate) e reflectantia coefficient (𝜌) es factor importante in captation de color human.
    • Modelar captation de color human presenta desafios, con multo aspectos non comprehendite.

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    02_CV2425_Human and Computer Vision_LR.pdf

    Description

    Explora le fundamentos de imaginis multispectral e hyperspectral, inclusiv le methodos de segmentatio e reduction de dimension. Aprende como le sensor e le illumination affecta le resultados de captura de imagines. Que es le impacte de distortiones geometric e radiometric in le processar de imagines?

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