If you are unhappy with suggested XSane, but only want an OSS solution, I do not know a good alternative.
Possible non-OSS solutionAlthough I am an open source enthusiast, there are few application where I use commercial, even non-OSS solutions on Linux. One of this exceptions is for scanning. Background: I “administrate” some legacy Epson scanners used with my family’s Linux boxes and got them all to run with a software called VueScan, with the following restrictions: - Perfection 3490 worked out of the box, no drivers required - Perfection 3170 requires Epson drivers (iscan_2.10.0-2_i386.deb, iscan-plugin-gt-9400_1.0.0-2_i386.deb), but only runs on 32bit Linux - Perfection V30 requires Epson drivers (scan-gt-f720-bundle-2.30.4.x64.deb.tar.gz) and simply works on 64bit Debian # As you see, it might be a bit of luck, if a device works out of the box or not. Unfortunately your Epson Stylus SX435W seems not to be listed under the supported Epson devices (click red button “All drivers” to see all supported Epson scanners). If you happen to find no solution, I suggest to use the trial version of VueScan and check if your Epson simply runs or not. EDIT: sorry, I forgot to mention. that the VueScan GUI has plenty of those processing options you are searching for.