how to pass a variable into imadjust?

Question

0 个投票

Hi,

I wish to pass the contrast limits in the imadjust using a variable.

I tried in this way but it didn't work. I'll get a value for lower contrast limit using a input dialog box.

 lowerContrast=str2num(answer{1});
 lowContLimit=sprintf('%d',lowerContrast);
 imgadj=imadjust(imgreen,[lowContLimit,1],[]);

but i am getting an error as

Function imadjust expected its second input argument, [LOW_IN; HIGH_IN] to be a two-element vector.

Can anyone help me.

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Deepak M D 2014-12-18

编辑：Deepak M D 2014-12-18

 lowerContrast=str2num(answer{1});
 lowContLimit=sprintf('%d',lowerContrast);
 imgadj=imadjust(imgreen,[val1 val2]);

such that 0<= val1 <=1 and 0<=val2 <=1

and val1 < val2

Manoj Kumar 2014-12-18

yes, the val1, val 2 lies between 0 and 1 and val1 is less than val2. Even then it is showing error?

Answer 1

Geoff Hayes 2014-12-18

0 个投票

Manoj - why are you creating a string as

lowContLimit=sprintf('%d',lowerContrast);

and trying to pass that into the imadjust function? Try instead

imgadj=imadjust(imgreen,[lowerContrast 1],[]);

where you are passing in the lower contrast as a number (with 1 as the upper bound on the interval).