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Image Reconstruction Techniques

Description: This quiz covers various image reconstruction techniques used in computer graphics and medical imaging.
Number of Questions: 15
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Tags: image reconstruction computer graphics medical imaging
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Which image reconstruction technique is commonly used in medical imaging to create cross-sectional images of the body?

  1. Computed Tomography (CT)

  2. Magnetic Resonance Imaging (MRI)

  3. Ultrasound

  4. X-ray


Correct Option: A
Explanation:

Computed Tomography (CT) is a medical imaging technique that uses X-rays and computer processing to create detailed cross-sectional images of the body.

In the context of image reconstruction, what is the term for the process of estimating the original image from a set of projections?

  1. Back-projection

  2. Filtered back-projection

  3. Iterative reconstruction

  4. Projection


Correct Option: A
Explanation:

Back-projection is the process of reconstructing an image by summing the contributions of each projection along each ray.

Which image reconstruction technique is commonly used in computer graphics to create 3D models from a set of 2D images?

  1. Photogrammetry

  2. Structure from Motion (SfM)

  3. Multi-view Stereo (MVS)

  4. Shape-from-Shading


Correct Option: B
Explanation:

Structure from Motion (SfM) is a technique for reconstructing the 3D structure of a scene from a set of 2D images taken from different viewpoints.

What is the name of the mathematical transform used in Fourier-based image reconstruction techniques?

  1. Fourier transform

  2. Inverse Fourier transform

  3. Radon transform

  4. Hilbert transform


Correct Option: A
Explanation:

The Fourier transform is a mathematical transform that converts a signal from the time domain to the frequency domain.

Which image reconstruction technique is commonly used in astronomy to create images of distant objects from a series of observations?

  1. Adaptive optics

  2. Interferometry

  3. Speckle imaging

  4. Long-baseline interferometry


Correct Option: B
Explanation:

Interferometry is a technique for combining the signals from multiple telescopes to create a single image with higher resolution.

In the context of image reconstruction, what is the term for the process of reducing noise and artifacts in the reconstructed image?

  1. Denoising

  2. Deblurring

  3. Inpainting

  4. Super-resolution


Correct Option: A
Explanation:

Denoising is the process of reducing noise and artifacts in an image.

Which image reconstruction technique is commonly used in medical imaging to create 3D models of organs and tissues from a set of 2D slices?

  1. Volume rendering

  2. Surface rendering

  3. Ray casting

  4. Marching cubes


Correct Option: A
Explanation:

Volume rendering is a technique for creating 3D images by assigning colors and opacities to voxels in a 3D volume.

What is the name of the mathematical transform used in Radon-based image reconstruction techniques?

  1. Radon transform

  2. Inverse Radon transform

  3. Fourier transform

  4. Hilbert transform


Correct Option: A
Explanation:

The Radon transform is a mathematical transform that converts a 2D image into a set of 1D projections.

Which image reconstruction technique is commonly used in computer graphics to create realistic images of natural scenes?

  1. Ray tracing

  2. Rasterization

  3. Voxel-based rendering

  4. Non-photorealistic rendering


Correct Option: A
Explanation:

Ray tracing is a technique for creating realistic images by simulating the path of light through a scene.

In the context of image reconstruction, what is the term for the process of increasing the resolution of the reconstructed image?

  1. Super-resolution

  2. Upsampling

  3. Interpolation

  4. Extrapolation


Correct Option: A
Explanation:

Super-resolution is the process of increasing the resolution of an image beyond the limits of the original sensor.

Which image reconstruction technique is commonly used in medical imaging to create functional images of the brain by measuring changes in blood flow?

  1. Functional Magnetic Resonance Imaging (fMRI)

  2. Positron Emission Tomography (PET)

  3. Single-Photon Emission Computed Tomography (SPECT)

  4. Magnetic Resonance Spectroscopy (MRS)


Correct Option: A
Explanation:

Functional Magnetic Resonance Imaging (fMRI) is a technique for creating functional images of the brain by measuring changes in blood flow.

In the context of image reconstruction, what is the term for the process of estimating the missing parts of an image?

  1. Inpainting

  2. Extrapolation

  3. Interpolation

  4. Super-resolution


Correct Option: A
Explanation:

Inpainting is the process of estimating the missing parts of an image.

Which image reconstruction technique is commonly used in computer graphics to create realistic images of human faces?

  1. 3D Morphable Models (3DMMs)

  2. High-Dynamic-Range Imaging (HDRI)

  3. Image-Based Rendering (IBR)

  4. Non-Photorealistic Rendering (NPR)


Correct Option: A
Explanation:

3D Morphable Models (3DMMs) are a technique for creating realistic images of human faces by combining a set of predefined facial shapes and textures.

In the context of image reconstruction, what is the term for the process of combining multiple images into a single, high-quality image?

  1. Image fusion

  2. Image stitching

  3. Image registration

  4. Image enhancement


Correct Option: A
Explanation:

Image fusion is the process of combining multiple images into a single, high-quality image.

Which image reconstruction technique is commonly used in medical imaging to create images of the heart and blood vessels?

  1. Cardiac Magnetic Resonance Imaging (CMR)

  2. Echocardiography

  3. Nuclear Cardiology

  4. Cardiac Computed Tomography (CCT)


Correct Option: A
Explanation:

Cardiac Magnetic Resonance Imaging (CMR) is a technique for creating images of the heart and blood vessels using magnetic resonance imaging (MRI).

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