These are the proprietary binary-only i386-only 
libraries for EPSON USB scanners. The libraries 
are provided under the terms of the license 
agreement provided in the EAPL and LICENSE files 
in the directory /usr/doc/iscan-proprietary-drivers/

The proprietary libraries used by the driver 
epkowa are only needed for the following scanners:

libesint1F: Perfection 1250 / Perfection 1250 
            PHOTO / GT-7200

libesint23: Perfection 1260 / Perfection 1260 
            PHOTO / GT-7300

libesint32: Perfection 3170 PHOTO / GT-9400

libesint41: Perfection 2480 PHOTO / GT-F500, 
            Perfection 2580 PHOTO / GT-F550

libesint43: Perfection 4180 PHOTO / GT-F600

libesint52: Perfection 3490 PHOTO / GT-F520, 
            Perfection 3590 PHOTO / GT-F570

libesint54: Perfection 4490 PHOTO / GT-X750

libesint66: Perfection V10 / GT-S600, 
            Perfection V100 PHOTO / GT-F650

libesint68: Perfection V350 PHOTO / GT-F700

libesint7A: Perfection V200 PHOTO / GT-F670

Additionally proprietary firmware files are 
only needed for the following scanners:

esfw41.bin: Perfection 2480 PHOTO / GT-F500, 
            Perfection 2580 PHOTO / GT-F550

esfw32.bin: Perfection 3170 PHOTO / GT-9400UF

esfw52.bin: Perfection 3490 PHOTO / GT-F520, 
            Perfection 3590 PHOTO / GT-F570

esfw43.bin: Perfection 4180 PHOTO / GT-F600

esfw54.bin: Perfection 4490 PHOTO / GT-X750

esfw66.bin: Perfection V10 / GT-S600, 
            Perfection V100 PHOTO / GT-F650

esfw68.bin: Perfection V350 PHOTO / GT-F700

esfw7A.bin: Perfection V200 PHOTO / GT-F670

The firmware files are provided in the package 
iscan-firmware.