Lecture Slides 6

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What is the primary goal of speckle filtering in SAR image processing?

To enhance image texture
To improve image resolution
To increase image noise
To better discriminate scene targets (correct)

What is the advantage of multi-look processing in SAR image processing?

Reducing image resolution
Enhancing image texture
Improving image quality factors (correct)
Increasing image noise

What is a challenge in selecting analysis methodologies for SAR image processing?

The presence of edge detectors
The presence of optical sensors
The presence of speckle noise (correct)
The presence of texture

What is a benefit of applying speckle filtering to SAR images?

Easier image segmentation (B) Signup and view all the answers

What is a potential application of SAR image processing after speckle filtering?

Edge detection (D) Signup and view all the answers

What type of filter is necessary for SAR images before applying classical edge detectors?

Gamma Filter (C) Signup and view all the answers

What is the main limitation of classical edge detectors in SAR images?

They detect more false edges within brighter areas (A) Signup and view all the answers

What is the purpose of edge detection in SAR images?

To segment the image into separate entities (C) Signup and view all the answers

Which edge detector is suitable for SAR images and does not require pre-filtering?

Ratio Edge Detector (B) Signup and view all the answers

Why do classical edge detectors perform poorly on SAR images?

Because they are sensitive to speckle noise (B) Signup and view all the answers

What is the primary characteristic of radar systems that causes geometric distortions?

Side-looking geometry (B) Signup and view all the answers

What is the main difference between geometric characteristics of SAR and optical remote sensing?

Viewing geometry (C) Signup and view all the answers

What is the primary purpose of geometric correction in SAR?

To correct for relief distortions (D) Signup and view all the answers

What is the effect of the local incident angle on SAR images?

It causes radiometric distortion (B) Signup and view all the answers

What is the result of the combination of incident angle and look direction in SAR?

Slant range scale distortions (A) Signup and view all the answers

What is the purpose of a layover/shadowing mask and a local incident angles map in SAR image processing?

To assist in many applications (A) Signup and view all the answers

What is necessary to know or assume for slant to ground range conversion in SAR image processing?

Imaging geometry, platform altitude, range delay, and terrain elevation (C) Signup and view all the answers

What is the purpose of resampling in SAR image geocoding?

To give uniform pixel spacing in ground range (C) Signup and view all the answers

When is slant to ground range conversion generally applied in SAR image processing?

After radiometric correction (C) Signup and view all the answers

What is the result of projecting the acquired image to the ground system in SAR image processing?

A geocoded image (D) Signup and view all the answers