| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| yakovsig | "שלום אמיר, אני מנסה לפתוח את הקובץ BUILD HSI על מנת להשתמש בSW אבל כאשר אני פותח אותו, עולההודעה כאילו לא התקנתי את הלאב-וויו, כאשר כן התקנתי. תוכל..." | Read more » | over 4 years ago | |||
| stoft | " "The diffraction grating is not perfectly flat" would suggest you are using one of the readily available 35-mm laser holographic film gratings -- ..." | Read more » | over 5 years ago | |||
| amirberAgain | "2 years after https://www.osapublishing.org/oe/fulltext.cfm?uri=oe-26-5-6021&id=382214 " | Read more » | over 5 years ago | |||
| elaineyuyu | "Hi Chris, thank you so much for your answer! It seems we will have to purchase one of those expensive multispectral cameras, since we need to ident..." | Read more » | about 6 years ago | |||
| cfastie | "Spectrometers based on consumer cameras, like the Public Lab spectrometers, can be built so they provide good information about which narrow wavele..." | Read more » | about 6 years ago | |||
| warren | "Also consider some of the work people have been doing with Raspberry Pi cameras to upgrade various spectrometry kits! https://publiclab.org/wiki/r..." | Read more » | over 6 years ago | |||
| amirberAgain | "Hi @planet, it's always fun to hear this kind of feedback. Please note that I only used the desktop spectrometer as a "reference design", you can u..." | Read more » | over 6 years ago | |||
| planet | "I'm also wondering if it's possible to make an image that are only shown at a specific wavelength. The image might not be visible with human eyes, ..." | Read more » | over 6 years ago | |||
| planet | "Hi @amirberAgain, thank you so much for sharing this. I've been searching on the web how I can make my own hyperspectral imaging camera and I'm so ..." | Read more » | over 6 years ago | |||
| kimoyerr | "Thanks @amirberAgain! I will try out different things. Excited to get my hands dirty! " | Read more » | over 6 years ago | |||
| amirberAgain | "Hi @kimoyerr, As long as you get the first order diffraction to the camera the pipe's shape is of lesser importance(that's what I think). My first ..." | Read more » | over 6 years ago | |||
| kimoyerr | "@amirberAgain This is a great post! I am new to hyperspectral imaging, but I am investigating using the technique to separate samples generated in ..." | Read more » | over 6 years ago | |||
| Sidney_AstroPlant | "Using NIR LEDs seems like a good option to look into and I'm happy to hear that I might not have to deal with extensive filtering! I just got a res..." | Read more » | almost 7 years ago | |||
| cfastie | "A simple option might be to turn on some NIR LEDs when the photography happens. The NIR:VIS ratio might not match sunlight, but if you know what it..." | Read more » | almost 7 years ago | |||
| Sidney_AstroPlant | "The kit is fully enclosed with LED with a certain blue and red ratio (I have to verify what the exact ratio is). This brings me to the conclusion t..." | Read more » | almost 7 years ago | |||
| cfastie | "Thanks for adding a photo. NDVI is based on the assumption that the light illuminating the foliage has a certain proportion of NIR and VIS -- the p..." | Read more » | almost 7 years ago | |||
| cfastie | "Using two cameras solves one of the two problems I described (mixed NIR and VIS). That problem can also be solved by measuring or making assumption..." | Read more » | almost 7 years ago | |||
| Sidney_AstroPlant | "Thanks Chris for your response. My assumption was that the blue filter supplied with the RPI Noir camera blocks the red channel fully. So you get a..." | Read more » | almost 7 years ago | |||
| Sidney_AstroPlant | "Thanks for the positive messages! I see that both of you are active in open source hardware and software initiatives. We are thinking to share our ..." | Read more » | almost 7 years ago | |||
| zengirl2 | "Glad you posted here as you know I'm a fan of the project. :) " | Read more » | almost 7 years ago | |||
| cfastie | "I haven't used the Pi NoIR cam and have not seen your photos, so I can only respond from general principles. Camera sensors are not as sensitive ..." | Read more » | almost 7 years ago | |||
| warren | "Just wanted to say this looks really cool! " | Read more » | almost 7 years ago | |||
| amirberAgain | "Forsure, thou, I wouldn't change the grating to a prism. option 1 Holographic diffraction grating from Edmond optics pack of 15 <20$US Option 2 ..." | Read more » | about 7 years ago | |||
| maykef | "@amirberAgain Your HW setup is pretty much interesting, I wonder if it can be upgrade to something more durable/precise, e.g. replacing the grating..." | Read more » | about 7 years ago |