Jared VacantiandMarco Trevisan (Treviño)
5b34908a21
Add support for the SecuGen Hamster Pro 20 (1162:2200), a 500 DPI press-type optical scanner built around the SIDO020A sensor. The protocol was reverse-engineered from USB packet captures. The sensor is configured over I2C-tunneled vendor control transfers and streams 956x688 raw frames over the bulk endpoint, read in 64KB chunks so the standard pcap-based test tooling can record full frames (the kernel usbmon interface truncates single URBs at ring_size/5). Frames are processed with band compensation, an edge-aware unsharp mask, a fixed-point bilinear downsample to 300x400, flat-field blending and directional sharpening, driven by per-device factory calibration data read from the device firmware. The fixed-point pipeline keeps the output bit-identical across compilers and architectures for the image comparison test. The sensor has no proximity hardware and its GET_STATUS request always returns zeros, so finger presence is detected by polling preview frames and comparing the mean brightness of the central region against a calibration background frame. Includes a umockdev capture/replay test with a reference image. Closes: https://gitlab.freedesktop.org/libfprint/libfprint/-/work_items/353
History
LibFPrint was originally developed as part of an academic project at the University Of Manchester.
It aimed to hide the differences between consumer fingerprint scanners and provide a single uniform API to application developers.
Goal
The ultimate goal of the FPrint project is to make fingerprint scanners widely and easily usable under common Linux environments.
License
Section 6 of the license states that for compiled works that use
this library, such works must include LibFPrint copyright notices
alongside the copyright notices for the other parts of the work.
LibFPrint includes code from NIST's NBIS software distribution.
We include Bozorth3 from the US Export Controlled distribution, which we have determined to be fine being shipped in an open source project.
Get in touch
- IRC -
#fprint@irc.oftc.net - Matrix -
#fprint:matrix.orgbridged to the IRC channel - MailingList - low traffic, not much used these days
