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by ngy
Sat Nov 02, 2013 8:39 am
Forum: Other projects
Topic: Disguise detection with an RPi
Replies: 2
Views: 776

Disguise detection with an RPi

Hi, just wanted to share my project. I'm using a raspberry pi + RPi camera board + far IR sensor + arduino to detect when people are wearing a mask. The basic idea is pretty simple: use OpenCV to find a face in the photo, and then get the temperature at that location using the IR device. Not bulletp...
by ngy
Sun Oct 20, 2013 8:16 am
Forum: Camera board
Topic: Pi NoIR and Iris recognition
Replies: 4
Views: 9285

Re: Pi NoIR and Iris recognition

One of the reasons NIR is used for iris recognition is to reduce reflection, so you might want to experiment with different filters. However, there are algorithms for recognition in the visible spectrum as well, so the Pi NoIR seems well suited for such a project. There's lots of open-source matchin...
by ngy
Wed Oct 02, 2013 7:02 pm
Forum: Camera board
Topic: OpenCV speedup using raspistill timelapse (5fps facetrack)
Replies: 16
Views: 16889

Re: OpenCV speedup using raspistill timelapse (5fps facetrac

Thanks for making this code available. I was just looking at the source, and correct me if I'm wrong, but it seems that it is processing/face-finding the frames at 7-9 fps, but they aren't necessarily new frames. That is still limited by the speed of raspistill timelapse mode, which is about 1 fps? ...
by ngy
Sun Aug 18, 2013 12:15 pm
Forum: Camera board
Topic: piipcam
Replies: 4
Views: 1706

Re: piipcam

In Icelandic: Hæ Kári. Lítur mjög spennandi út. Ég hlakka til að heyra meira um þetta verkefni!
by ngy
Thu Aug 15, 2013 3:55 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Problem reading RAM with I2C (MLX90620)
Replies: 12
Views: 4711

Re: Problem reading RAM with I2C (MLX90620)

For anyone else who has this problem, I think I have found some relevant information:

http://www.raspberrypi.org/phpBB3/viewt ... p?p=362243

It looks like there is something about the way the RPi issues an I2C read command that is not compatible with this sensor.
by ngy
Thu Aug 15, 2013 9:29 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Problem reading RAM with I2C (MLX90620)
Replies: 12
Views: 4711

Problem reading RAM with I2C (MLX90620)

Is there any reason why the RPi would be unable to read RAM using I2C? Details: I am trying to get my RPi interfacing with the MLX90620 thermal sensor The MLX90620 has both EEPROM and RAM. I am able to read from EEPROM, write to RAM, but not read from RAM (code below) I found a blog post that says: ...
by ngy
Wed Jul 24, 2013 4:20 pm
Forum: Troubleshooting
Topic: PI broken?
Replies: 14
Views: 2256

Re: PI broken?

I was having the same problem, but with a different pin (BCM 17). In the end, it turns out there was an driver loaded at boot time that was preventing me from using all the GPIO pins (it was for LedBorg). Now that I look at their site they are clear about this. However, I hadn't used the component f...
by ngy
Mon May 20, 2013 7:34 am
Forum: Camera board
Topic: Thermal imaging possible?
Replies: 13
Views: 15265

Re: Thermal imaging possible?

Cool - good find! Any idea how easy it would be to interface with an RPi? Just today I came across this: http://www.melexis.com/Infrared-Thermometer-Sensors/Infrared-Thermometer-Sensors/MLX90620-776.aspx Super-low resolution at only 16x4 pixels, but it is a true thermal imager (thermopile technology...
by ngy
Fri May 17, 2013 8:44 am
Forum: Camera board
Topic: Connecting two cameras
Replies: 2
Views: 1216

Connecting two cameras

I'm at the very early stages of a project idea. What I would like to do is experiment with stereoposis. The basic idea would be to have two CSI cameras and combine them to get an estimate of depth. I'm assuming there won't be enough computational power on a single RPi to run 2 cameras and do all the...

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