How to output matrix grayscale?
1 Ansicht (letzte 30 Tage)
Ältere Kommentare anzeigen
Pryschepa Daryna
am 4 Mär. 2021
Kommentiert: KALYAN ACHARJYA
am 4 Mär. 2021
I am trying to output my matrix grayscale with imshow(), but its looks like gradient.
My code is:
s=4;
A=256;
N=200;
i=1:N;
r=0.1*(i-N/2);
f=exp(-r.^2/2/s^2);
M=A*(f'*f);
imshow(M,[]);
Please, help me to find a solution to this problem
1 Kommentar
KALYAN ACHARJYA
am 4 Mär. 2021
"matrix grayscale with imshow(), but its looks like gradient"
Can you re-read the statement again and explain more? graysclae is scale range (shaded variation), where as gradient is derivative?
Akzeptierte Antwort
KALYAN ACHARJYA
am 4 Mär. 2021
This one?
imagesc(M);
3 Kommentare
Bjorn Gustavsson
am 4 Mär. 2021
No, you don't need to use imshow to get the matrix in gray-scale. You can set the colormap to gray. You can also read the help and documentation to imshow to learn how that functions works, particularly with respect to intensity-scaling of inputs with different data-types...
KALYAN ACHARJYA
am 4 Mär. 2021
@Pryschepa Daryna set the colormap as you want
Weitere Antworten (1)
Bjorn Gustavsson
am 4 Mär. 2021
You could use imagesc instead of imshow. Combined with colorbar you get a neat display of your matrix. Since you asked for gray-scale, you'll also have to set the colormap, so something like this:
imagesc(M)
colorbar
colormap(gray)
HTH
0 Kommentare
Siehe auch
Kategorien
Mehr zu Red finden Sie in Help Center und File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!