Description
Exercise 13a. Implement the program ‘exercise_13a_minimum’ that checks whether or not the flat zone (piecewise-constant region) of a pixel (x,y) is a regional minimum.
exercise_13a_minimum exercise_13a_input_01.txt exercise_13a_input_01.pgm exercise_13 a_output_01.pgm
The input file ‘exercise_13a_input_01.txt’ is an input file with
| 4 lines | of parameters: | |||||||
| -At | line | 1: | an | integer | number | ‘x’ that denotes the | column | of the pixel. |
| -At | line | 2: | an | integer | number | ‘y’ that denotes the | row of | the pixel. |
| -At | line | 3: | an | integer | number | ‘connectivity’ that | denotes | the |
connectivity number employed (4 or 8, corresponding to 4-connectivity or 8-connectivity, respectively).
The program should write 1 or 0 to an output file called exercise_13a_output_01.txt depending on whether or not the flat zone of pixel (x,y) is a regional minimum.
(Note: regional minimum: flat zone whose neighboring regions all have greater intensity values.)
Note: 8-connectivity can be assumed.
To check this program:
-immed_gray_inv_20051218_frgr4.pgm (input image)
-For pixel (column=90, row=40), the result should be 1 (the flat zone is a regional minimum).
-For pixel (column=60, row=35), the result should be 0 (the flat zone is not a regional minimum).
(Note: pixel (column=0, row=0) is that at the upper-left corner.)
Exercise 13b. Similarly, implement the program ‘exercise_13a_maximum’ that checks whether or not the flat zone (piecewise-constant region) of a pixel (x,y) is a regional maximum.
exercise_13b_maximum exercise_13b_input_01.txt exercise_13b_input_01.pgm exercise_13 b_output_01.pgm
The input file ‘exercise_13b_input_01.txt’ is described in the previous exercise.
The program should write 1 or 0 to an output file called exercise_13b_output_01.txt depending on whether or not the flat zone of pixel (x,y) is a regional maximum.
(Note: regional maximum: flat zone whose neighboring regions all have lesser intensity values.)
Note: 8-connectivity can be assumed.
To check this program:
-immed_gray_inv_20051218_frgr4.pgm (input image)
-For pixel (column=35, row=20), the result should be 1 (the flat zone is a regional maximum).
-For pixel (column=20, row=15), the result should be 0 (the flat zone is not a regional maximum).
(Note: pixel (column=0, row=0) is that at the upper-left corner.)
