During my testing with your provided samples, I was able to read the barcodes from images AM1000a.tif and AM1000b.tif by using the latest version of Aspose.BarCode for Java v4.4.1. Only the image AM1000c.tif didn’t get scanned, so I have logged a ticket (BARCODJAVA-33140) in our bug tracking system to look into this issue. We will keep you posted with updates.
Please note, with latest version [link provided above] if you set the BarCodeReadType to Code128, you may get an extra character (f) at the start of CodeText. We have already fixed this issue and the next version will reflect these changes. To avoid, please set the BarCodeReadType to EAN128.