Hi, I tried to divide my file into 2 parallel file: a main file and a function file. Can somebody help me with this?

type('Lab2Part1.m')

a = imread('coloredChips.png');
figure(1), imshow(a);

% Creat menu of color
disp('Color selection')
disp('r for red')
disp('b for blue')
disp('y for yellow')
disp('m for magenta')
disp('g for green')
disp('c for cyan')
disp('o for orange')



% Now we want input from user to tell us which color to change
x = input(' Please select the color you want to change: ','s');

copy = a;

dimension = size(a);
row_n = dimension (1);
col_n = dimension (2);

switch x
    case 'r'
        for row = 1:row_n
            for col = 1:col_n
                pixel_red = a(row,col,1);
                pixel_green = a(row,col,2);
                pixel_blue = a(row,col,3);
                
                if (pixel_red >= 200) && (pixel_green <= 60) && (pixel_green >= 5)  && (pixel_blue <= 99) && (pixel_blue >=15)
                    copy(row,col,1) = 0;
                    copy(row,col,2) = 0;
                    copy(row,col,3) = 0;
                end
            end
        end
        case 'b'
        for row = 1:row_n
            for col = 1:col_n
                pixel_red = a(row,col,1);
                pixel_green = a(row,col,2);
                pixel_blue = a(row,col,3);
                
                if (pixel_red >= 2) && (pixel_green <= 99) && (pixel_green >= 71)  && (pixel_blue <= 99) && (pixel_blue >=233) && (pixel_red <= 127) && (pixel_blue <= 254)
                    copy(row,col,1) = 0;
                    copy(row,col,2) = 0;
                    copy(row,col,3) = 0;
                end
            end
        end
        case 'y'
        for row = 1:row_n
            for col = 1:col_n
                pixel_red = a(row,col,1);
                pixel_green = a(row,col,2);
                pixel_blue = a(row,col,3);
                
                if (pixel_red >= 170) && (pixel_red <= 255) && (pixel_green >= 170) && (pixel_green <= 255) && (pixel_blue <= 90)
                    copy(row,col,:) = 0;
                end
            end
        end
    case 'o'
        for row = 1:row_n
            for col = 1:col_n
                pixel_red = a(row,col,1);
                pixel_green = a(row,col,2);
                pixel_blue = a(row,col,3);
                
                if (pixel_red >= 200) && (pixel_red <= 255) && (pixel_green >= 65) && (pixel_green <= 100) && (pixel_blue >= 0) && (pixel_blue <= 100)
                    copy(row,col,:) = 0;
                end
            end
        end
    case 'g'
        for row = 1:row_n
            for col = 1:col_n
                pixel_red = a(row,col,1);
                pixel_green = a(row,col,2);
                pixel_blue = a(row,col,3);
                
                if (pixel_green >= 90) && (pixel_red <= 55) && (pixel_blue >= 55) && (pixel_blue <= 180)
                    copy(row,col,:) = 0;
                end
            end
        end
        case 'm'
        for row = 1:row_n
            for col = 1:col_n
                pixel_red = a(row,col,1);
                pixel_green = a(row,col,2);
                pixel_blue = a(row,col,3);
                
                if (pixel_red <= 228) && (pixel_red >= 105)  && (pixel_green <= 70 ) &&  (pixel_blue <= 228) && (pixel_blue >= 60)
                    copy(row,col,1) = 0;
                    copy(row,col,2) = 0;
                    copy(row,col,3) = 0;
                end
            end
        end
      case 'c' 
        for row = 1:row_n
            for col = 1:col_n
                pixel_red = a(row,col,1);
                pixel_green = a(row,col,2);
                pixel_blue = a(row,col,3);
                
                if (pixel_blue >= 140) && (pixel_blue <=220) && (pixel_red <= 70) && (pixel_red >= 8)  && (pixel_green <= 230) && (pixel_green >=185 )
                    copy(row,col,1) = 0;
                    copy(row,col,2) = 0;
                    copy(row,col,3) = 0;
                end
            end
        end
    case

    otherwise
        disp('Incorrect selection, please choose from the menu');
end


% display the modified image
figure(2),imshow(copy);

[Dyuman Joshi]

You should specify what exactly you need help with and provide all relevant information.

And there are no functions in the code above.

Answer 1

[Gayatri]

Hi Phat,

To divide your script into two parts : a main file and a function file, create a main script that handles user input and image display, and a separate function that processes the image based on the selected color.

• Main File: colorChangeMain.m. This file will handle user interaction and display the original and modified images.

% Load the image
a = imread('coloredChips.png');
figure(1), imshow(a);

% Display color selection menu
disp('Color selection')
disp('r for red')
disp('b for blue')
disp('y for yellow')
disp('m for magenta')
disp('g for green')
disp('c for cyan')
disp('o for orange')

% Get user input for color selection
x = input('Please select the color you want to change: ', 's');

% Call the function to process the image
copy = processColorChange(a, x);

% Display the modified image
figure(2), imshow(copy);

• Function File: processColorChange.m. This function will take the original image and the user-selected color as input, process the image and return the modified image.

function copy = processColorChange(a, x)
    % Copy the original image
    copy = a;
    
    % Get the dimensions of the image
    dimension = size(a);
    row_n = dimension(1);
    col_n = dimension(2);
    
    % Process the image based on the selected color
    switch x
        case 'r'
            % Insert the case 'r' code block here
        case 'b'
            % Insert the case 'b' code block here
        case 'y'
            % Insert the case 'y' code block here
        case 'o'
            % Insert the case 'o' code block here
        case 'g'
            % Insert the case 'g' code block here
        case 'm'
            % Insert the case 'm' code block here
        case 'c'
            % Insert the case 'c' code block here
        otherwise
            disp('Incorrect selection, please choose from the menu');
    end
end

For each color case ('r', 'b', 'y', 'o', 'g', 'm', 'c'), you should insert the respective code block from your original script into the function processColorChange within the appropriate case section.

I hope it helps!