CS50-04-filter-less

https://cs50.harvard.edu/x/2023/psets/4/filter/less/#specification

Filter - CS50x 2023

 

 

코드가 지나치게 길어져서

블러 부분을 다시 만들어야한다. 

 

작동은 정상작동 함.

#include "helpers.h"
#include <string.h>
#include <math.h>

// Convert image to grayscale
void grayscale(int height, int width, RGBTRIPLE image[height][width])
{
    for (int i = 0; i < height; i++)
    {
        for (int j = 0; j < width; j++)
        {
            float rgb_average = // 수정됨 BYTE에서 float
                (image[i][j].rgbtBlue + image[i][j].rgbtGreen + image[i][j].rgbtRed) / 3.0;
            image[i][j].rgbtBlue = (BYTE)round(rgb_average);  // (BYTE)추가
            image[i][j].rgbtGreen = (BYTE)round(rgb_average); // round추가
            image[i][j].rgbtRed = (BYTE)round(rgb_average);
            // change color to red
        };
    };
    return;
}

// Convert image to sepia
void sepia(int height, int width, RGBTRIPLE image[height][width])
{
    for (int i = 0; i < height; i++)
    {
        for (int j = 0; j < width; j++)
        {
            float new_red = image[i][j].rgbtRed * .393 + image[i][j].rgbtGreen * .769 + image[i][j].rgbtBlue * .189;
            float new_green = image[i][j].rgbtRed * .349 + image[i][j].rgbtGreen * .686 + image[i][j].rgbtBlue * .168; // 숫자오타
            float new_blue = image[i][j].rgbtRed * .272 + image[i][j].rgbtGreen * .534 + image[i][j].rgbtBlue * .131;
            // BYTE -> float 변경

            if (new_blue > 255)
            {
                image[i][j].rgbtBlue = 255;
            }
            else
            {
                image[i][j].rgbtBlue = (BYTE)round(new_blue);
            };

            if (new_green > 255)
            {
                image[i][j].rgbtGreen = 255;
            }
            else
            {
                image[i][j].rgbtGreen = (BYTE)round(new_green);
            };

            if (new_red > 255)
            {
                image[i][j].rgbtRed = 255;
            }
            else
            {
                image[i][j].rgbtRed = (BYTE)round(new_red);
            };
        };
    };
    return;
}

// Reflect image horizontally
void reflect(int height, int width, RGBTRIPLE image[height][width])
{
    RGBTRIPLE temp_image[height][width];
    memset(temp_image, 0, sizeof(temp_image));
    for (int i = 0; i < height; i++)
    {
        for (int j = 0; j < width; j++)
        {
            memcpy(&temp_image[i][width - j - 1], &image[i][j], sizeof(RGBTRIPLE));
            // width-j 가 앞쪽에 있어야함. 순서대로 복사해야하므로.
            // 반대로하면 함수가 순서대로 작동이 안됨.  -1추가됨
        };
    };
    memcpy(image, temp_image, sizeof(RGBTRIPLE[height][width]));
    return;
}

// Blur image
void blur(int height, int width, RGBTRIPLE image[height][width])
{
    RGBTRIPLE temp_image[height][width];
    memset(temp_image, 0, sizeof(temp_image));
    memcpy(temp_image, image, sizeof(RGBTRIPLE[height][width]));
    for (int i = 0; i < height; i++)
    {
        for (int j = 0; j < width; j++)
        {
            if (i == 0 && j == 0) // 좌상단모서리
            {
                float new_blue =
                    (temp_image[i + 0][j + 0].rgbtBlue +
                     temp_image[i + 0][j + 1].rgbtBlue +
                     temp_image[i + 1][j + 0].rgbtBlue +
                     temp_image[i + 1][j + 1].rgbtBlue) /
                    4.0;
                float new_green =
                    (temp_image[i + 0][j + 0].rgbtGreen +
                     temp_image[i + 0][j + 1].rgbtGreen +
                     temp_image[i + 1][j + 0].rgbtGreen +
                     temp_image[i + 1][j + 1].rgbtGreen) /
                    4.0;
                float new_red =
                    (temp_image[i + 0][j + 0].rgbtRed +
                     temp_image[i + 0][j + 1].rgbtRed +
                     temp_image[i + 1][j + 0].rgbtRed +
                     temp_image[i + 1][j + 1].rgbtRed) /
                    4.0;
                image[i][j].rgbtBlue = (BYTE)round(new_blue);
                image[i][j].rgbtGreen = (BYTE)round(new_green);
                image[i][j].rgbtRed = (BYTE)round(new_red);
            }
            else if (i == 0 && j == width - 1) // 우측상단모서리
            {
                float new_blue =
                    (temp_image[i + 0][j - 1].rgbtBlue +
                     temp_image[i + 0][j + 0].rgbtBlue +

                     temp_image[i + 1][j - 1].rgbtBlue +
                     temp_image[i + 1][j + 0].rgbtBlue) /
                    4.0;
                float new_green =
                    (temp_image[i + 0][j - 1].rgbtGreen +
                     temp_image[i + 0][j + 0].rgbtGreen +
                     temp_image[i + 1][j - 1].rgbtGreen +
                     temp_image[i + 1][j + 0].rgbtGreen) /
                    4.0;
                float new_red =
                    (temp_image[i + 0][j - 1].rgbtRed +
                     temp_image[i + 0][j + 0].rgbtRed +
                     temp_image[i + 1][j - 1].rgbtRed +
                     temp_image[i + 1][j + 0].rgbtRed) /
                    4.0;
                image[i][j].rgbtBlue = (BYTE)round(new_blue);
                image[i][j].rgbtGreen = (BYTE)round(new_green);
                image[i][j].rgbtRed = (BYTE)round(new_red);
            }
            else if (i == height - 1 && j == width - 1) // 우측하단모서리
            {
                float new_blue =
                    (temp_image[i + 0][j - 1].rgbtBlue +
                     temp_image[i + 0][j + 0].rgbtBlue +
                     temp_image[i - 1][j - 1].rgbtBlue +
                     temp_image[i - 1][j + 0].rgbtBlue) /
                    4.0;
                float new_green =
                    (temp_image[i + 0][j - 1].rgbtGreen +
                     temp_image[i + 0][j + 0].rgbtGreen +
                     temp_image[i - 1][j - 1].rgbtGreen +
                     temp_image[i - 1][j + 0].rgbtGreen) /
                    4.0;
                float new_red =
                    (temp_image[i + 0][j - 1].rgbtRed +
                     temp_image[i + 0][j + 0].rgbtRed +
                     temp_image[i - 1][j - 1].rgbtRed +
                     temp_image[i - 1][j + 0].rgbtRed) /
                    4.0;
                image[i][j].rgbtBlue = (BYTE)round(new_blue);
                image[i][j].rgbtGreen = (BYTE)round(new_green);
                image[i][j].rgbtRed = (BYTE)round(new_red);
            }
            else if (i == height - 1 && j == 0) // 좌측하단모서리
            {
                float new_blue =
                    (temp_image[i + 0][j + 0].rgbtBlue +
                     temp_image[i + 0][j + 1].rgbtBlue +
                     temp_image[i - 1][j + 0].rgbtBlue +
                     temp_image[i - 1][j + 1].rgbtBlue) /
                    4.0;
                float new_green =
                    (temp_image[i + 0][j + 0].rgbtGreen +
                     temp_image[i + 0][j + 1].rgbtGreen +
                     temp_image[i - 1][j + 0].rgbtGreen +
                     temp_image[i - 1][j + 1].rgbtGreen) /
                    4.0;
                float new_red =
                    (temp_image[i + 0][j + 0].rgbtRed +
                     temp_image[i + 0][j + 1].rgbtRed +
                     temp_image[i - 1][j + 0].rgbtRed +
                     temp_image[i - 1][j + 1].rgbtRed) /
                    4.0;
                image[i][j].rgbtBlue = (BYTE)round(new_blue);
                image[i][j].rgbtGreen = (BYTE)round(new_green);
                image[i][j].rgbtRed = (BYTE)round(new_red);
            }
            else if (i != 0 && i != height - 1 && j == width - 1) // 오른쪽변
            {
                float new_blue =
                    (temp_image[i + 1][j - 1].rgbtBlue +
                     temp_image[i + 0][j - 1].rgbtBlue +
                     temp_image[i - 1][j - 1].rgbtBlue +
                     temp_image[i + 1][j + 0].rgbtBlue +
                     temp_image[i + 0][j + 0].rgbtBlue +
                     temp_image[i - 1][j + 0].rgbtBlue) /
                    6.0;
                float new_green =
                    (temp_image[i + 1][j - 1].rgbtGreen +
                     temp_image[i + 0][j - 1].rgbtGreen +
                     temp_image[i - 1][j - 1].rgbtGreen +
                     temp_image[i + 1][j + 0].rgbtGreen +
                     temp_image[i + 0][j + 0].rgbtGreen +
                     temp_image[i - 1][j + 0].rgbtGreen) /
                    6.0;
                float new_red =
                    (temp_image[i + 1][j - 1].rgbtRed +
                     temp_image[i + 0][j - 1].rgbtRed +
                     temp_image[i - 1][j - 1].rgbtRed +
                     temp_image[i + 1][j + 0].rgbtRed +
                     temp_image[i + 0][j + 0].rgbtRed +
                     temp_image[i - 1][j + 0].rgbtRed) /
                    6.0;
                image[i][j].rgbtBlue = (BYTE)round(new_blue);
                image[i][j].rgbtGreen = (BYTE)round(new_green);
                image[i][j].rgbtRed = (BYTE)round(new_red);
            }
            else if (i != 0 && i != height - 1 && j == 0) // 왼쪽변
            {
                float new_blue =
                    (temp_image[i - 1][j + 0].rgbtBlue +
                     temp_image[i - 1][j + 1].rgbtBlue +
                     temp_image[i + 0][j + 0].rgbtBlue +
                     temp_image[i + 0][j + 1].rgbtBlue +
                     temp_image[i + 1][j + 0].rgbtBlue +
                     temp_image[i + 1][j + 1].rgbtBlue) /
                    6.0;
                float new_green =
                    (temp_image[i - 1][j + 0].rgbtGreen +
                     temp_image[i - 1][j + 1].rgbtGreen +
                     temp_image[i + 0][j + 0].rgbtGreen +
                     temp_image[i + 0][j + 1].rgbtGreen +
                     temp_image[i + 1][j + 0].rgbtGreen +
                     temp_image[i + 1][j + 1].rgbtGreen) /
                    6.0;
                float new_red =
                    (temp_image[i - 1][j + 0].rgbtRed +
                     temp_image[i - 1][j + 1].rgbtRed +
                     temp_image[i + 0][j + 0].rgbtRed +
                     temp_image[i + 0][j + 1].rgbtRed +
                     temp_image[i + 1][j + 0].rgbtRed +
                     temp_image[i + 1][j + 1].rgbtRed) /
                    6.0;
                image[i][j].rgbtBlue = (BYTE)round(new_blue);
                image[i][j].rgbtGreen = (BYTE)round(new_green);
                image[i][j].rgbtRed = (BYTE)round(new_red);
            }
            else if (i == 0 && j != 0 && j != width - 1) // 위쪽변
            {
                float new_blue =
                    (temp_image[i + 0][j - 1].rgbtBlue +
                     temp_image[i + 0][j + 0].rgbtBlue +
                     temp_image[i + 0][j + 1].rgbtBlue +
                     temp_image[i + 1][j - 1].rgbtBlue +
                     temp_image[i + 1][j + 0].rgbtBlue +
                     temp_image[i + 1][j + 1].rgbtBlue) /
                    6.0;
                float new_green =
                    (temp_image[i + 0][j - 1].rgbtGreen +
                     temp_image[i + 0][j + 0].rgbtGreen +
                     temp_image[i + 0][j + 1].rgbtGreen +
                     temp_image[i + 1][j - 1].rgbtGreen +
                     temp_image[i + 1][j + 0].rgbtGreen +
                     temp_image[i + 1][j + 1].rgbtGreen) /
                    6.0;
                float new_red =
                    (temp_image[i + 0][j - 1].rgbtRed +
                     temp_image[i + 0][j + 0].rgbtRed +
                     temp_image[i + 0][j + 1].rgbtRed +
                     temp_image[i + 1][j - 1].rgbtRed +
                     temp_image[i + 1][j + 0].rgbtRed +
                     temp_image[i + 1][j + 1].rgbtRed) /
                    6.0;
                image[i][j].rgbtBlue = (BYTE)round(new_blue);
                image[i][j].rgbtGreen = (BYTE)round(new_green);
                image[i][j].rgbtRed = (BYTE)round(new_red);
            }
            else if (i == height - 1 && j != 0 && j != width - 1) // 아래쪽변
            {
                float new_blue =
                    (temp_image[i - 1][j - 1].rgbtBlue +
                     temp_image[i - 1][j + 0].rgbtBlue +
                     temp_image[i - 1][j + 1].rgbtBlue +
                     temp_image[i + 0][j - 1].rgbtBlue +
                     temp_image[i + 0][j + 0].rgbtBlue +
                     temp_image[i + 0][j + 1].rgbtBlue) /
                    6.0;
                float new_green =
                    (temp_image[i - 1][j - 1].rgbtGreen +
                     temp_image[i - 1][j + 0].rgbtGreen +
                     temp_image[i - 1][j + 1].rgbtGreen +
                     temp_image[i + 0][j - 1].rgbtGreen +
                     temp_image[i + 0][j + 0].rgbtGreen +
                     temp_image[i + 0][j + 1].rgbtGreen) /
                    6.0;
                float new_red =
                    (temp_image[i - 1][j - 1].rgbtRed +
                     temp_image[i - 1][j + 0].rgbtRed +
                     temp_image[i - 1][j + 1].rgbtRed +
                     temp_image[i + 0][j - 1].rgbtRed +
                     temp_image[i + 0][j + 0].rgbtRed +
                     temp_image[i + 0][j + 1].rgbtRed) /
                    6.0;
                image[i][j].rgbtBlue = (BYTE)round(new_blue);
                image[i][j].rgbtGreen = (BYTE)round(new_green);
                image[i][j].rgbtRed = (BYTE)round(new_red);
            }
            else
            {
                float new_blue =
                    (temp_image[i - 1][j - 1].rgbtBlue +
                     temp_image[i - 1][j + 0].rgbtBlue +
                     temp_image[i - 1][j + 1].rgbtBlue +
                     temp_image[i + 0][j - 1].rgbtBlue +
                     temp_image[i + 0][j + 0].rgbtBlue +
                     temp_image[i + 0][j + 1].rgbtBlue +
                     temp_image[i + 1][j - 1].rgbtBlue +
                     temp_image[i + 1][j + 0].rgbtBlue +
                     temp_image[i + 1][j + 1].rgbtBlue) /
                    9.0;
                float new_green =
                    (temp_image[i - 1][j - 1].rgbtGreen +
                     temp_image[i - 1][j + 0].rgbtGreen +
                     temp_image[i - 1][j + 1].rgbtGreen +
                     temp_image[i + 0][j - 1].rgbtGreen +
                     temp_image[i + 0][j + 0].rgbtGreen +
                     temp_image[i + 0][j + 1].rgbtGreen +
                     temp_image[i + 1][j - 1].rgbtGreen +
                     temp_image[i + 1][j + 0].rgbtGreen +
                     temp_image[i + 1][j + 1].rgbtGreen) /
                    9.0;
                float new_red = // float 변경
                    (
                        temp_image[i - 1][j - 1].rgbtRed +
                        temp_image[i - 1][j + 0].rgbtRed +
                        temp_image[i - 1][j + 1].rgbtRed +
                        temp_image[i + 0][j - 1].rgbtRed +
                        temp_image[i + 0][j + 0].rgbtRed +
                        temp_image[i + 0][j + 1].rgbtRed +
                        temp_image[i + 1][j - 1].rgbtRed +
                        temp_image[i + 1][j + 0].rgbtRed +
                        temp_image[i + 1][j + 1].rgbtRed) /
                    9.0;                                      // .0추가
                image[i][j].rgbtBlue = (BYTE)round(new_blue); // round, byte강제화 추가
                image[i][j].rgbtGreen = (BYTE)round(new_green);
                image[i][j].rgbtRed = (BYTE)round(new_red);
            };
        };
    };
    return;
}