# How to obtain an image from meshlsrm plot?

Hi, I have a Digital Elevation Model on a .tif file. In order to visualize a shaded relief version of it, I’m using this code:

`A = geotiffread('dem.tif');info = geotiffinfo('dem.tif');lat = info.CornerCoords.Lat;lon = info.CornerCoords.Lon;RObj = georasterref('RasterSize',size(A),'LatitudeLimit',[min(lat(:)) max(lat(:))],'LongitudeLimit',[min(lon(:)) max(lon(:))]);worldmap(A,RObj);cmap = colormap(gray(256));meshlsrm(A,RObj,[135, 27],cmap);`

On the plot that result from meshlsrm, I have to do other elaboration (for example I need to use the canny edge detector, and the the Hough transform). Someone knows a way in order to obtain a gray scale image from meshlsrm?

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The color displayed is determined by the colormap. You can change it from the default to grayscale with the following command:

`colormap gray`

Afterward, you can do something like the following to obtain the actual image from the surface object:

`image = frame2im(getframe(gcf));image = rgb2gray(image);figure; imshow(image);`

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## Technical Source

Simple! That is me, a simple person. I am passionate about knowledge and reading. That’s why I have decided to write and share a bit of my life and thoughts to.