Faster Scan time

For the best results we need 2 image sets per scan, one with and one without projection. One other key succesfactor is that there is no movement between the 2 image sets. The shorter the time between the images is, the less change there is movement.

In the current release of the software the time between the images is a few 100s of milliseconds (~500 depending on what raspberry you are using). I have been working hard on getting this time-between-images lower. This is quite a challenge, as it is not just about taking the images fast in good quality, but also making sure the projection and lighting control happen at the exact right moment.

The good news is that I have been able to make test scans with just 70ms between the images! That is over 5x faster then in the previous releases and I still was able to get good synchronization with the projection system. The test was done on the old Raspberry model b+ models with the 5mp camera, but I have been getting good results with the newer raspberry models and 8mp cameras as well.

You can download the test scan here

The new faster scanning feature will be made available in the next release of the software.

New LED Control boards released

If you want to control the power output of your LED lighting, you can use the LPF-xxD LED powersupply controller range for this. These power supplies come with an control signal input. By controlling the resistance on the control cable, you can control the actual light output (constant current limiting).

To easily control this "control signal", I have designed a simple PCB. It just require an opto isolator and some resistors.

You can purchase the boards as a kit, where you (simply) have to solder on the components or you can buy them ready to use.

High CRI Led light test

CRI (color rendering index) is a measure of how accurately a light source illuminates objects' true colors. We wanted to know how this impacts the images taken by the Raspberry PI Camera (5MP and 8MP). So we did a test, check out the results here

DSLR Support

Want to mix Raspberry PI cameras and DSLR? This is now possible with the latest release (v.4.5.5). In this release you will need one dedicated raspberry per DSLR camera (in next release multiple DSLR per raspberry will be supported). Just connect the DSLR camera to one of the USB ports of a Raspberry running in mode 5 and make sure that you can trigger the DSLR camera using the GPIO ports. Easiest way is to just use a simple opto-isolator for this.

Main reasons to add DSLR camera(s) to you setup:?

- A single DSLR with wide angle to capture a high quality picture of the person being scanned, for instance as print out when people have visited your scanner.

- Multiple DSLR cameras aimed for instance at the face, to capture a much higher quality mesh/texture for the face region.

If you connected the DSLR up correctly, you do not need to do anything special. The DSLR camera is automatically detected and you can make scans, preview images from all cameras including the DSLR camera(s) and download all the images.

For detailed interface and configuration details click here

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