Hello, I am writing a driver for Egis Technology Inc. sensor (ID 1c7a:0570), but having few problems. First of all, i have no idea what is the model of my sensor. I've checked USB.org product lists as well as manufacturer's website and Acer website (I am using Acer Swift 1 SF-113-31 with this sensor integrated). I failed to find any kind of information about my device and started to write driver without that. I was managed to recreate driver exchange process and get data from the sensor. This is the press-type sensor and it returns 32512 bytes of data in one packet, which seem to be raw image data. I don't know what is the size of the returned image, so i've picked up the most suitable one for libfprint driver. Couple days ago i finished libfprint driver and it works fine, except of the fact that the verify_live example from libfprint is not able to do correct verification. It can't recognize same finger again and allows to pass verification by another finger, which is kinda funny.
I have absolutely no experience with fingerprint scanner and I was hoping that someone here could help me. This is the repository of my driver: https://github.com/indev29/egis0570 The 'scans' directory contains examples of fingerprint scans converted into different sized .pgm images as well as raw binary data, received from sensor. Directories names ("scans/finger_avg_NUM") indicate average color value, which is more, when i press harder on sensor. My questions are: 1. Should i use this raw image data in my libfprint driver or should i process it somehow first? 2. If raw data is fine, why am i not able to do verification correctly? 3. Does libfprint care about image size? Can the wrong image size be the thing in my case (i am using 254x128) Thanks in advance, Indev
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