Quiver Plot over Binary map

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Yogang
Yogang il 14 Giu 2022
Commentato: KALYAN ACHARJYA il 18 Giu 2022
I have a binary image of the coastline and would like to plot quiver (representative of wind) on the top of the binary map. The issue I am having is:
(1) How to plot vectors on the water area by extracting the features between land and water?
(2) How to finally get a combined image comprising of vector and binary data?
My current code is here:
im = imread('Genova_Binary.tif');
Error using imread>get_full_filename
File "Genova_Binary.tif" does not exist.

Error in imread (line 371)
fullname = get_full_filename(filename);
[x,y] = meshgrid(-2:.2:2,-1:.15:1);
z = x .* exp(-x.^2 - y.^2); [px,py] = gradient(z,.2,.15);
quiver(x,y,px,py); axis image %plot the quiver to see the dimensions of the plot
hax = gca; %get the axis handle
image(hax.XLim,hax.YLim,im); %plot the image within the axis limits
hold on; %enable plotting overwrite
quiver(x,y,px,py) %plot the quiver on top of the image (same axis limits)

Risposte (1)

KALYAN ACHARJYA
KALYAN ACHARJYA il 14 Giu 2022
Modificato: KALYAN ACHARJYA il 14 Giu 2022
im = imread('Genova_Binary.tif');
[x,y] = meshgrid(-2:.2:2,-1:.15:1);
z = x .* exp(-x.^2 - y.^2); [px,py] = gradient(z,.2,.15);
quiver(x,y,px,py); axis image %plot the quiver to see the dimensions of the plot
hax = gca; %get the axis handle
image(hax.XLim,hax.YLim,im); %plot the image within the axis limits
hold on; %enable plotting overwrite
quiver(x,y,px,py) %plot the quiver on top of the image (same axis limits)
Please ensure "Genova_Binary.tif" must be in currunt working directory.
  2 Commenti
Yogang
Yogang il 14 Giu 2022
I am already having the working code here for the above plot but my question is :
(1) How to plot vectors on the water area by extracting the features between land and water? So I just want the vectors over water area not over land.
KALYAN ACHARJYA
KALYAN ACHARJYA il 18 Giu 2022
Can it be done segmentation in particular water area only (after quiver plot)? Is that OK?

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