بنك الاسئلة ESR 2011 2ND 423

Answer the Following Questions:

Question 1:

Define the following:

1-     Spatial Resolution

……………………………………………………………………………………………………………………………………………………………………

2-     Image Restoration

……………………………………………………………………………………………………………………………………………………………………

3-     Intensity and saturation transformations

……………………………………………………………………………………………………………………………………………………………………

Question 2:

1-      Compare between the following satellites:

2-     Write the main characteristics (spectral resolution and spatial resolution) of the quickbird satellite?

Question 3:  

1-     What are the reasons of geometric distortions in the satellite images?

…………………………………………………………………………………………………………………………………………………………………….

2-     Explain shortly correcting for atmospheric scattering?

…………………………………………………………………………………

Question 4:

Apply the following high pass filter to the original data of the image and write the DN values of the data after applying the filter?  What is the importance of applying this filter?

      High Pass Filter

      Original Data                                           Data after applying the filter 

Question 5:

Write shortly about the following image processing techniques? Show your answer with drawing?

1-     Linear contrast stretch

2-     Merging data sets

3-     Principal-component images

4-     Unsupervised classification

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With My Best Wishes     Dr.Adel Zein Elabedeen Bishta

Model Answer

      Final Exam. (Computer Processing of Satellite Data - ESR 423)  

   1431 – 1432 H

Name:……………………………  ………………….……….    No……….……….

Question 1:

1-      Spatial Resolution

……… -The capability of a sensor to distinguish between small objects

…………-It is the pixel size…………………………

2-      Image Restoration

……… for data errors, noise, and geometric distortions introduced during the scanning, recording, and playback operations.

3-      Intensity:

represents brightness variations and ranges from black (0) to white (255) No color is associated with this axis.

saturation transformations:

      represents the purity of color and is represented by the radius that ranges from 0 at the center of the color sphere to 255 at the  circumference.

Question 2:

1-      Compare between the following satellites:

2-     The main characteristics (spectral resolution and spatial resolution) of the quickbird satellite:

B1      (Blue)      2.4 m

B2    (Green)     2. 4 m

B3       (Red)      2.4 m

B4      (NIR)       2.4 m

One Panchromatic Band  =   0.61 m

Pan –Sharpened (PS)  =   60  or  70 cm