I am trying to merge (and align) three scanned black and white TIFF images of old photos (dimension of each image is 2480 x 3508).
The images are overall of good quality (low noise), have small overlaps and are pretty well aligned (minimal cropping should be needed on merged image).
I tried using the Photo Merge options but I get unknown error or "not enough info to estimate the camera motion".
Not sure what to do next....
What version or LR? Although there are a few problems being reported with the latest (6.4), it sound like your problem is the "small overlap". The automatic merge to pano algorithms generally require a very generous overlap to work correctly. 30-40% overlap for each picture is typical. Sounds to me that you may have to do this manually in PS.
Thank you for the useful reply.
I updated to the latest LR version, and at least now I can see the images inside of the Panorama window with different projections.
However, once I select Merge, the application crashes with this error:
Problem Event Name: APPCRASH
Application Name: lightroom.exe
Application Version: 22.214.171.124
Application Timestamp: 56a2e8ef
Fault Module Name: StackHash_8cab
Fault Module Version: 6.1.7601.19110
Fault Module Timestamp: 568429e5
Exception Code: c0000374
Exception Offset: 00000000000bffc2
OS Version: 6.1.7601.2.1.0.256.48
Locale ID: 1033
Additional Information 1: 8cab
Additional Information 2: 8cab7204dbb82444e280aa23a464d37b
Additional Information 3: 2000
Additional Information 4: 200059a6835754cfd7efe43e1a4354e4