webvalley
webvalley


Author Comment Last activity Moderation
warren "Some serious progress has been made on this, for running SpectralWorkbench on the Raspberry Pi and connecting to it's camera: https://github.com/pu..." | Read more » about 4 years ago
raj "raspberry pi camera: spectral response curves for more details go through my website you can get all details http://zipansion.com/1TSg4 " | Read more » over 4 years ago
warren "Just wanted also to link to @stoft's input on this question in this comment: As to the RPi camera, it seems to have two "difficulties" which need ..." | Read more » over 6 years ago
warren "Oh great; @khufkens also shared that on this site! https://publiclab.org/notes/khufkens/11-02-2015/ov5647-raspberry-pi-camera-spectral-response-qua..." | Read more » over 6 years ago
warren "I found that V4L2 driver apparently makes it possible to use the raspberry pi camera in Firefox with webrtc, the API Spectral Workbench uses: https..." | Read more » over 6 years ago
Siphirobe "I was wondering the same thing, just with the PiNoIR camera since I am more interested in remote sensing of vegetation. " | Read more » over 6 years ago
stef "@warren After sleeping it over, realized that due to the no IR filter of the raspberry the bandwidth response will be different from the published..." | Read more » over 6 years ago
stef "@warren Here is a link http://www.khufkens.com/projects/ov5647-spectral-response/ and here is a zip file khufkens-pi-camera-response-curves-3342e..." | Read more » over 6 years ago
warren "That's a great thing to point out -- do you per chance have a link to the spectral bandwidth of the sensors? Thanks! " | Read more » over 6 years ago
stef "The BIG advantage of the Raspberry Pi is the use of the Sony IMX298 sensor whose spectral bandwidth is known and is 16 megapixel sensor. Much like ..." | Read more » over 6 years ago
tonyc "Have you all seen the PhotosynQ project? It is an LED based device using reflectance to measure leaf chlorophyl. it started as an incubated kit on ..." | Read more » over 6 years ago
cristoforetti "@tonyc the project is really under development in these days. Here at webvalley 2016 we are concentrating on measuring grapes and raspberries. Hope..." | Read more » over 6 years ago
tonyc "That's a really cool use case I hadn't heard of before! Is it something you've had luck with using the PL spectrometer, reading fruit? I imagine e..." | Read more » over 6 years ago
cristoforetti "@tonyc, the idea is having a portable spectrometer to evaluate fruit maturity in the field to decide about harvesting. In this sense design is cert..." | Read more » over 6 years ago
tonyc "Is the form factor your main concern in these designs? I'm curious what is the test you are trying to run in the field with the spectrometer? " | Read more » over 6 years ago
dhaffnersr "I have a similar camera in my spectrometer and was having the same light spot interfering and showing up in the spectral data, I had to bring mine ..." | Read more » over 6 years ago
warren "This is especially cool as it uses a Raspberry Pi camera, which it seems can be set for fixed exposure and uncompressed image capture. I'm going to..." | Read more » over 6 years ago
dhaffnersr " stoft, see, that's what I'm talking about, finding the work-around, that's actually a great idea and very cost effective. " | Read more » over 6 years ago
stoft "Yes, both aluminum and silver oxidize very rapidly which is why all mirrors with those surfaces are coated -- the type of coating affects the mirro..." | Read more » over 6 years ago
dhaffnersr " cristoforetti, oh yeah, that's perfectly fine I do the same thing when I build a prototype. I use some pretty unconventional material sometimes! " | Read more » over 6 years ago
cristoforetti "@dhaffnersr thank you for the reference. You are certainly right, my only point is that it will take some time to have an aluminum coated mirror, i..." | Read more » over 6 years ago
dhaffnersr "hey cristoforetti , I just wanted to give you some info on why you should be using the aluminum coated mirrors: Aluminum is also common used in m..." | Read more » over 6 years ago
cristoforetti "@stoft thank you very much for the clarification and suggestions. About 1) I am looking to use cars mirror, that should be front-surface mirrors. ..." | Read more » over 6 years ago
stoft "@cristoforetti, the camera focal distance is based on using a slit to simulate collimated light -- non-collimated light gives multiple diffraction ..." | Read more » over 6 years ago