Matlab programming need help, I don't Matlabhe matlab syntax, but I have included the psedocode and my code .

psedocode:

function output = halftone(input)

img = read image (img_file)

// create 10 dot patterns in 3 dimensional matrix for example dots(:,:,1) = [0,0,0; 0,0,0; 0,0,0];

dots is 3 dimensional matriux should be

// size of dots is = 3, 3, 10

[row, cols] = size (input);

// loop through the input image doing the following;

// computer the average value over 3*3 pixel block.

// use this average value to copy the appropriate dot pattern to the output image.

// if the dimensions of the input iamge are not multiples of three then treat the edges as special cases

// If the dimensions of the input image are not multiples of three then treat the edges as special case:

// if the dimension of the input imnage are not mutiples of three then treat the edges as special cases

// - compute average over whatevr size block is at edge of image (2* 3)

// -use this value to copy poart of the appropriate dot pattern to the output image 2* 3 block for example.

for r = 1:3 rows

for c= 1: 3 cols

compute average over 3 *3 in input image

use linear interpolation to map this average to the integer 0-9

END

copy the appropriate dot pattertn to the output image

end

// special case for column dimentiuon not mutiple of 3

...

end

//special case for tow dimension not multiple of 3.

my code so far:

function output = halftone(in)

% create dot patterns using matrix % dots(:, :, 1) = 0, 0, 0; 0, 0,0; 0,0 ,0;i dots = [3,3,10];

dots(:,:,1) = [0,0,0; 0,0,0; 0,0,0]; dots(:,:,2) = [0,255,0; 0,0,0; 0,0,0]; dots(:,:,3) = [0,255,0; 0,0,0; 0,0,255]; dots(:,:,4) = [255,255,0; 0,0,0; 0,0,255]; dots(:,:,5) = [255,255,0; 0,0,0; 255,0,255]; dots(:,:,6) = [255,255,255; 0,0,0; 255,0,255]; dots(:,:,7) = [255,255,255; 0,0,255; 255,0,255]; dots(:,:,8) = [255,255,255; 0,0,255; 255,255,255]; dots(:,:,9) = [255,255,255; 255,0,255; 255,255,255]; dots(:,:,10) = [255,255,255; 255,255,255; 255,255,255];

[rows, col] = size(in);