hi, I want to ask. I have 512×512 image and I want to calculate the entropy. But, it has some error because the pixel contains negative value. Has anybody in here know how to do Matlab code to convert negative pixel to positive pixel and decode it back? please help me
MATLAB: How to encode and decode negative pixel to positive pixel in matlab
errorimage processingImage Processing Toolboxlossless image compressionnegative pixelpixel converterpositive pixel
Related Solutions
You probably want
maskedImage = binaryImage .* originalImage;Assuming you have the simbolic toolbox
clc;clear; %clean up command window and variables!!!!
s=tf('s') %make s tf type
H = (3*s + 1)/(s^2 + 2*s +5) %transfer functions of system
X = 1/(s+3) %input
Y=H*X %output
[num,den]=tfdata(Y) %get the polinomial coeficients
nums=poly2sym(num{:},'s') %get symbolic expressions
dens=poly2sym(den{:},'s') %
Yt=ilaplace(nums/dens) %get the inverse laplace transform
%Yt=(cos(2*t) + sin(2*t)/2)/exp(t) - 1/exp(3*t) %my result
%compare both expression in a graph
tv=0:0.01:10; %make a time vector
Yt0=subs(Yt,'t',tv); %get function values
Yt1=1.118*exp(-tv).*cos(2*tv - 26.6) - exp(-3*tv); %
clf;hold on; %create a clean figure and turn aditive ploting on
plot(tv,Yt0) %matlab expression
plot(tv,Yt1,'r') %your expression
legend('my expression','your expression')
%they are very similar
I'm not sure about the results!
Best Answer