Combining datasets using Geo data/ How to retain data values using 'imfuse'

Hi,

I am trying to imfuse these two datasets Data1 & Data2 (data type Double) with R1 and R2 (R1 and R2 are spatial coordinates data & pixel sizes etc.). However, the end product 'AB' is changing the data type to uint 8, and this change of data type is also affecting the values in dataset (changed). I have checked the documentation but the output of 'Imfuse' is 'uint 8'.

I need some advise, How can I embed these two datasets using geo data, which dont alter its data values. If there is some other function or technique to do it. Kindly advise.

AB=imfuse(data2,R2,data1,R1,'blend','Scaling','joint');
figure;
imshow(AB);

I have attached the files.

Answer 1

[Chandrika]

Hello Abdul,

I would suggest you referring any of the following possible workarounds in this case:

• In your code, at the end, you may use the "im2double" function to convert back your fused data to 'double' datatype:

AB=imfuse(data2,R2,data1,R1,'blend','Scaling','joint');
AB1=im2double(AB);
figure;
imshow(AB1);

• Another workaround could be using the "fitgeotform2d" and "imwarp" functions. In this scenario, please look into the following sample code snippet as a reference:

r1Limits = [R1.XWorldLimits; R1.YWorldLimits];
r2Limits = [R2.XWorldLimits; R2.YWorldLimits];
% Create a transformation
tform = fitgeotform2d(r2Limits, r1Limits, 'similarity');
% Align data2 to the spatial reference of data1
objectalignedData2 = imwarp(data2, R2, tform, 'OutputView', R1);
% Fuse the datasets
fusedData = double((data1 + objectalignedData2)/2);
% Display
figure;
imshow(fusedData,[])

For more details on using the "fitgeotform2d" function and "imwarp" function, you may follow the MathWorks documentation links attached below:

• https://www.mathworks.com/help/images/ref/fitgeotform2d.html
• https://www.mathworks.com/help/images/ref/imwarp.html

Hope you find it useful!

Regards,

Chandrika