Introduction The motivation for modifying and publishing the firmware images below was to fix an error in the manufacturer supplied firmware. Namely that scanners running it don’t produce HD video as advertised. The firmware images below have Auto Exposure and Auto White Balance disabled. The exposure time is fixed at 54ms and the sensor gain is fixed at unity gain. The gain settings for Red, Green and Blue, hitherto set by the Auto White Balance code, are also fixed.

This post is obsolete. I have published updated firmware images here. Introduction I recently came up with a firmware modification for these scanners which causes them to produce video of a significantly higher quality than usual. The modification involves restricting the Quantization Parameter (QP) of the H.264 codec used by the Novatek chips in these scanners to a maximum value of 17. In the H.264 video compression standard, QP values range from 0 (least compressed & lossless) to 51 (most compressed & worst quality).