Remote Sensing Image Processing
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Questions and Answers

What is the primary purpose of multi-looking in SAR image processing?

  • To enhance radiometric resolution
  • To reduce speckle noise in the final image (correct)
  • To correct for azimuth ambiguity
  • To increase spatial resolution

What is the effect of speckle reduction by spatial filtering on the output image?

  • It reduces the effect of azimuth ambiguity
  • It enhances radiometric resolution (correct)
  • It has no effect on the image resolution
  • It improves spatial resolution

What is the cause of azimuth ambiguity in SAR images?

  • Scalloping effects
  • Coherent illumination and processing
  • Platform or sensor problems (correct)
  • Automatic Gain Control effects

What is the result of a single look image in SAR processing?

<p>An image with the highest achievable resolution and containing speckle (C)</p> Signup and view all the answers

What is the purpose of reprocessing in SAR image analysis?

<p>To improve image radiometrics and geometrics (C)</p> Signup and view all the answers

What is the term for the bright linear features that appear at approximately constant range in SAR images?

<p>Nadir Ambiguity (C)</p> Signup and view all the answers

What is the term for the corduroy-like radiometric banding that appears across the scene in SAR images?

<p>Scalloping (D)</p> Signup and view all the answers

What is the term for the pattern of spatial tone variations in SAR images?

<p>Texture (B)</p> Signup and view all the answers

What is the term for the unwanted brightness variation in SAR images caused by radar artifacts?

<p>Radar Artifacts (A)</p> Signup and view all the answers

What is the term for the simultaneous returns from the desired illuminated region and a previously or successively transmitted pulse in SAR images?

<p>Range Ambiguity (D)</p> Signup and view all the answers

What is the primary cause of speckle in SAR imagery?

<p>Random constructive and destructive interference from multiple scattering returns (D)</p> Signup and view all the answers

What is the effect of speckle on the quality of SAR images?

<p>It degrades the quality of the image, making interpretation more difficult (B)</p> Signup and view all the answers

What is the purpose of multiple-look filtering in SAR imagery?

<p>To reduce the effects of fading and speckle (A)</p> Signup and view all the answers

What is the result of averaging independent samples in SAR imagery?

<p>Effective reduction of the effects of fading and speckle (D)</p> Signup and view all the answers

What is the appearance of a homogeneous target, such as a grass-covered field, in an SAR image without speckle?

<p>Light-toned pixels (D)</p> Signup and view all the answers

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