hyperspectral
hyperspectral


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 » almost 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 4 years ago
amirberAgain "2 years after https://www.osapublishing.org/oe/fulltext.cfm?uri=oe-26-5-6021&id=382214 " | Read more » almost 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 » over 5 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 » over 5 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 » almost 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 » almost 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 » almost 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 » almost 6 years ago
kimoyerr "Thanks @amirberAgain! I will try out different things. Excited to get my hands dirty! " | Read more » about 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 » about 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 » about 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 » about 6 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 » about 6 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 » about 6 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 » about 6 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 » about 6 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 » about 6 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 » about 6 years ago
zengirl2 "Glad you posted here as you know I'm a fan of the project. :) " | Read more » about 6 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 » about 6 years ago
warren "Just wanted to say this looks really cool! " | Read more » about 6 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 » over 6 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 » over 6 years ago