Image compression channel not working

Question

Matt Alvarez 2022-7-3

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1752525-image-compression-channel-not-working

编辑： Walter Roberson 2022-7-3

Hi im working on a image compression code for matlab below is the code

clear all;
% Tx Rx Setup
enc = comm.RSEncoder;
mod = comm.DPSKModulator('BitInput',false);
chan = comm.AWGNChannel(...
                'NoiseMethod','Signal to noise ratio (SNR)','SNR',10);
demod = comm.DPSKDemodulator('BitOutput',false);
hDdecec = comm.RSDecoder;
errorRate = comm.ErrorRate('ComputationDelay',3);
%compression
X = dctcompr ("Picturetest.jpg",19200,"OutputPicturetest.jpg")
%Reading and converting to  digital data of image (working)
im=imread('OutputPicturetest.jpg');
imshow(im)
pause(1)
IMAGEBIN=im2bw(im,0.4);
imshow(IMAGEBIN);
%channel(not working, incomplete from project specs)
encodedData = step(enc, IMAGEBIN(:,[1]));
modSignal = step(mod, encodedData);
receivedSignal = step(chan, modSignal);
demodSignal = step(demod, receivedSignal);
receivedSymbols = step(hDdecec, demodSignal);
errorStats = step(errorRate, data, receivedSymbols); 
%merge decoded column matrices into one
%mask the merged matrix to original image to simulate conversion(working)
maskedImage=uint8(IMAGEBIN).*im;
%show image and save(working)
imshow(maskedImage);
imsave;

The image "Picturetest.jpg" is a 1080p photo from the internet

for compression, i am using a function made by Luigi rosa from file exchange

Currently my code is having problems on the channel part. When i run the code, this error message pops up:

Error using IntegerRSEncoder/step
The input data type must
not be Boolean.
Error in comm.RSEncoder/stepImpl (line 341)
        y = step(obj.cIntRSEnc, x);
        