In SQL Server, Images cannot be displayed when the image type is migrated to the Blob type in Oracle. Why ???? Ask bloggers for help

I have encountered such a problem in a project.
In SQL Server, Images cannot be displayed when the image type is migrated to the Oracle blob type. I have read an image data in SQL Server.
As follows:
1. SQL Server
Select datalength (D. Photo) from drivers d Where D. name like '% Lu Bin %'
Output:
132727

Select D. Photo from drivers d Where D. name like '% Lu Bin %'
Output:
Bytes

2. Oracle
Select dbms_lob.getlength (D. Photo) from drivers d Where D. name like '% Lu Bin %'
Output:
132727

Select D. Photo from drivers d Where D. name like '% Lu Bin %'
Output:
Bytes

The migrated data is in hexadecimal format, but the image cannot be displayed. Why ??? So depressed.