Undefined function 'dwt2' for input arguments of type 'uint8'

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Sai Challa
Sai Challa 2017-4-16
评论： Walter Roberson 2019-4-24
Undefined function 'dwt2' for input arguments of type 'uint8'
I get this error when running the code below:
[ll1,hl1,lh1,hh1]=dwt2(ROIout,'db1');
ROIout is the ROI output of a DICOM image which was converted to uint 8.
Thanks in advance.
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umair ilyas
umair ilyas 2019-4-24
Input image A is undefined or invalid.
>> bfilter2
Error using bfilter2 (line 5)
Input image A is undefined or invalid.
Walter Roberson
Walter Roberson 2019-4-24
What are you expecting to have happen when you invoke bfilter2 as a command with no arguements ?

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回答（2 个）

Image Analyst
Image Analyst 2017-4-16
So, try casting to double and see if that works:
[ll1, hl1, lh1, hh1] = dwt2(double(ROIout), 'db1');
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Sai Challa
Sai Challa 2017-4-17
It didn't work.
Undefined function 'dwt2' for input arguments of type 'double'.
This is the error, I get.
Image Analyst
Image Analyst 2017-4-17
Are you sure you have the Wavelet Toolbox installed? Type ver to double check.

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Sajjad Ali
Sajjad Ali 2017-6-18
I have Wavelet Toolbox installed I tried your solution but it did not worked error is same still
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Mohammad Bhat
Mohammad Bhat 2018-3-3
编辑：Walter Roberson 2018-5-25
which dwt2 -all
S = license('inuse')
'dwt2' not found.
S =
1x2 struct array with fields:
feature
user
what to do now

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