clear;clc;%初始化
fig=imread('Q.bmp');
imshow(fig)
J = imresize(fig,[240 320]); %B = imresize(A,m) returns an image B that is m times the size of A, 
                             %using nearest-neighbor interpolation. A can be an indexed image, grayscale image, 
                             %RGB, or binary image. If m is between 0 and 1.0, B is smaller than A. If m is greater than 1.0, B is larger than A.
                             %將影像x縮放到row列,cow行的大小在這即是列240行320 
r=J(:,:,1);
g=J(:,:,2);
b=J(:,:,3);
%把rgb圖像分成課本20-11的解說
figure
imshow(J)
s = serial('COM1','BaudRate', 115200, 'DataBits',8, 'StopBits',1, 'FlowControl', 'none', 'Parity', 'none');
%設定參數constructs a serial port object associated with 
%port, PORT. If PORT does not exist or is in use you will not be able 
%to connect the serial port object to the device.
fopen(s);% To connect the serial port object to the serial port:
         % 打開串列互通道
for i=1:240
    for j=1:320
        fwrite(s, r(i,j));
        fwrite(s, g(i,j));%把資料丟到串列互通道上完成
        fwrite(s, b(i,j));
    end
end
fclose(s);% To disconnect the serial port object from the serial port.
          % 關閉串列互通道 
delete(s) % 刪除COM1
clear s