Can someone help me with this assignment?
EXERCISE
Submit answers for the following question.
(4 pts) Assume the following declarations:
char name[21];
char yourName[21];
char studentName[31];
Mark each of the following statement as valid or invalid. If a statement is valid, explain what it does. For an invalid statement, explain what’s wrong and correct it.
a. yourName[0] = ‘ ’;
b. yourName = studentName;
c. if (yourName == name) // if contain same words
std::cout << “Same word in ” << yourName << ” and ” << name;
d. for (int j=0; j < name.length; j++)
std::cout << name[j];
PROJECT: Image Processing
Write a program to simulate image processing (blur an image, see Unit 3_3_ch8_2dArray slides). An image file is simulated by a 2D array of ints. Shell code is provided in HW5_image_shell.cpp, which includes the following functions:
Process an image file (blur the image).
Print out blurred image on screen.
The screenshot below shows a sample image:
Remember, image blurring is done by calculating the weighted average of each pixel (each element of the 2D array). The weights are specified by a predefined 3 by 3 weight mask:
1 2 1
2 2 2
1 2 1
The center weight 2 (highlighted) is applied to a pixel itself and the other weights are applied to its 8 neighbors.
New value of a pixel = [ sum (weight for itself/neighbor × value of itself/neighbor) ] / sum of weights
We will use approach 1 for pixels with less than 8 neightbors:
Approach 1: pixels with fewer than 8 neighbors are not processed
Blurred result:
For example, new value for pixel[1][1] (in yellow rectangle) would be calculated based on itself and 8 neighbors.
new value for pixel[1][1]
= (1 * 10 + 2 * 100 + 1 * 10 +
2 * 10 + 2 * 300 + 2 * 10 +
1 * 100 + 2 * 10 + 1 * 100) / 14 // 14 is the sum of the weights: 1+2+1 + 2+2+2 + 1+2+1
= 1080 / 14
= 77.14… à 77 is kept as the result
You need to add code to ADD #1-2:
ADD #1: declaration of function blur. Be sure to add IN/OUT/INOUT comment to each parameter.
ADD #2: implementation of function blur
You’re not supposed to modify the given code otherwise (at least 10% penalty).
Submission: 2 files
In one word/pdf document:
Answers to exercise 1
Project: screenshot of program execution
One cpp file: HW5_image_YourLastName.cpp
Use the rubric below to check the completeness of your work before turning it in.
Rubric: CS225, HW5
| Item | Max
(Pts) |
Received
(Pts) |
| Exercise (4 pts) | ||
| E1. C-string: for each one, ½ pts for answer, ½ pts for explanation | 4 | |
| Project (14 pts) | ||
| function declaration for function blur with param type comments | 1 | |
| implementation of function blur
Old value of each pixel is used when calculating new values all pixels with 8 neighbors are processed correctly approach 1: all pixels with fewer than 8 neighbors use old value |
3
6 3 |
|
| Your project compiles and runs. | 1 | |
| Programming style (2 pts)
Consistent indentation: preferred 2 spaces for each level Meaningful names for constants and variables; Proper comments in the program |
0.5
1.5 |
|
| Penalty | ||
| Modified given .cpp file in unspecified ways | At least (-2) | |
| Missing required screenshot(s) | (-2) | |
| Total: | 20 |
// HW5_image_shell.cpp (shell code. ADD CODE #1 and #2)
// by Bin “Crystal” Peng, CS225
// image processing
// blur an image. print it on screen
#include <iostream>
#include <iomanip> // std::setw()
//———————————————-
// global declarations
//———————————————-
// max dimension of 2D array
const int MAX_ROW = 100;
const int MAX_COL = 100;
//———————————————-
// function declarations
//———————————————-
// blur an image
// Pre: pic filled with height x width numbers
// Post: pic is blurred using a 3 x 3 predefined weight mask
// ADD CODE #1: function declaration
// END ADD CODE #1
// print an image on screen
void printImage(const int pic[][MAX_COL]/*IN*/, int height/*IN*/, int width/*IN*/);
// Pre: pic filled with height x width numbers
// Post: image printed to screen. The height and width are printed first and then the image file data is printed
//———————————————-
int main()
{
// one image
int image[MAX_ROW][MAX_COL] = {
{ 10, 100, 10, 100, 10, 100 },
{ 10, 300, 10, 300, 10, 300 },
{ 100, 10, 100, 10, 100, 10 },
{ 300, 10, 300, 10, 300, 10 } };
int imgHeight = 4; // height of image
int imgWidth = 6; // width of image
// process the image
blur(image, imgHeight, imgWidth);
printImage(image, imgHeight, imgWidth);
return 0;
} // end main
//———————————————-
// Function Implementation
//———————————————-
// blur an image
// Pre: pic filled with height x width numbers
// Post: pic is blurred using a 3 x 3 predefined weight mask
// ADD CODE #2: implementation of function blur
// END ADD CODE #2
// print an image to output stream obj out
void printImage(const int pic[][MAX_COL]/*IN*/, int height/*IN*/, int width/*IN*/)
{
std::cout << height << ‘ ‘ << width << ‘n’;
for (int row = 0; row < height; row++)
{
for (int col = 0; col < width; col++)
{
std::cout << std::setw(4) << pic[row][col];
}
std::cout << ‘n’;
}
} // end printImage
