MATLAB Answers


how to manipulate imwrite caxis?

Asked by Mohamed
on 5 Oct 2012

If you choose a colormap for imwrite, how does the colorscaling work? is there a way to try manipulate the caxis by choosing the number of steps in the colormap for example?


Log in to comment.


No products are associated with this question.

1 Answer

Answer by Walter Roberson
on 5 Oct 2012

The documentation indicates,

 imwrite(X,map,filename,fmt) writes the indexed image in X and its associated colormap map to filename in the format specified by fmt. 

The question of color scaling is thus irrelevant, as indexed images do not use color scaling.

I suspect you might want to take advantage of the File Exchange contribution "freezeColors" to convert the image into a truecolor image that you can get() the Cdata property of and imwrite() that array (with no map)


Log in to comment.

Discover MakerZone

MATLAB and Simulink resources for Arduino, LEGO, and Raspberry Pi

Learn more

Discover what MATLAB® can do for your career.

Opportunities for recent engineering grads.

Apply Today

MATLAB Academy

New to MATLAB?

Learn MATLAB today!