Error when using imshow()

Hi,

I'm trying use imshow to display a colormap image, however I get the following error:

??? Error using ==> checkDisplayRange at 22 HIGH must be greater than LOW.

Error in ==> imageDisplayValidateParams at 57 common_args.DisplayRange = checkDisplayRange(common_args.DisplayRange,mfilename);

Error in ==> imageDisplayParseInputs at 79 common_args = imageDisplayValidateParams(common_args);

Error in ==> imshow at 199 [common_args,specific_args] = ...

What does this mean and how can I solve this problem? Any suggestions would be of help.

Thanks

Answer 1

[Walter Roberson]

You used imshow() in the form

imshow(YourData, [LOW HIGH])

but your HIGH value was not strictly greater than your LOW value (e.g., might have been the same value or they might have been reversed.)

[bazinga]

Yes I have used that form. I have looked at the values; the maximum is 1 and minimum is 0.

[Walter Roberson]

imshow doesn't think that you passed in [0 1], but I do not know what it thinks you passed. The values passed in: what class() were they?

At the MATLAB command line, command

dbstop if error

and run again. When it stops in checkDisplayRange have a look at what values the routine things HIGH and LOW have. Then command "dbup" enough times to get to the outer level of imshow() and see the values as they were received in the routine. Then dbup again and check the values as passed.