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gretchengehrke commented on What are ways to record ambient temperature every 5 sec and export easily? over 2 years ago

@carohowe, Agreed! I read a paper a while ago (which I can't seem to find now) that demonstrated ...

eustatic commented on What do you do if your environmental concern is linked to your neighbor's paycheck? over 2 years ago

it depends on the degree of retaliation a company is willing to pursue. it's easiest to fire the...

suman commented on Introducing the calibration plugin for ImageJ/Fiji over 2 years ago

Hello Ned, I tried using different exposure settings now, and its working, the pixels aren't satu...

shanlter commented on Monitor transparency, dissolved oxygen, ORP, and ammonia from a river over 2 years ago

"Did the Chinese government state the methods they would use to evaluate each of these parameters...

shanlter commented on Monitor transparency, dissolved oxygen, ORP, and ammonia from a river over 2 years ago

Hi @gretchengehrke, sorry for responding late, I was in a temple with no internet access in the p...

nedhorning commented on Seeking DC-area folks interested in building temperature sensors for urban heat island measurement over 2 years ago

Hi - This recent paper might be helpful: www.mdpi.com/2073-445X/6/2/38/pdf From my experience sat...

carohowe commented on an answer about What are ways to record ambient temperature every 5 sec and export easily? over 2 years ago

@pera THANK YOU! That would be ideal! (Also, I'd LOVE to join the DC Women and Bicycles forum any...

carohowe commented on What are ways to record ambient temperature every 5 sec and export easily? over 2 years ago

Thanks @gretchengehrke -- that's definitely what we're looking into! So many of DC's food deserts...

carohowe commented on Seeking DC-area folks interested in building temperature sensors for urban heat island measurement over 2 years ago

Thanks so much @liz @stevie and @bronwen for your input. Liz, I think it's a fantastic idea to us...

MadTinker commented on Build KnowFlow: automatic water moniter over 2 years ago

@shantler @rockets FWIW- came home today with a mailbox literally full of 'stuff'. Also, many tha...

gretchengehrke commented on What are some options for low cost methane monitoring? over 2 years ago

Hi @stevie, I'm not sure if this is on the market yet, but it looks like IBM is developing a chip...

Bronwen commented on What are some options for low cost methane monitoring? over 2 years ago

This article is behind a paywall, but some of the tools/methods listed might be worth doing some ...

Bronwen commented on Seeking DC-area folks interested in building temperature sensors for urban heat island measurement over 2 years ago

I haven't used this tool myself, but you might find this project about another open source temper...

gretchengehrke commented on What are ways to record ambient temperature every 5 sec and export easily? over 2 years ago

Hi @carohowe, this sounds like an interesting project! In addition to broadly looking at the impa...

liz commented on Software for mapping trees? over 2 years ago

Hi Sebastian, i know OpenTreeMap is quite a big platform at this point, but considering how many ...

liz commented on Seeking DC-area folks interested in building temperature sensors for urban heat island measurement over 2 years ago

LB: Hi @carohowe i am wondering if there might be any use to starting with publicly available dat...

stevie commented on Seeking DC-area folks interested in building temperature sensors for urban heat island measurement over 2 years ago

Hi! The I See Change project was in Harlem not DC, but it might be a good example to check out.

nedhorning commented on Introducing the calibration plugin for ImageJ/Fiji over 2 years ago

Hi Suman - Using Analyze => Measure should work. It's not uncommon to have high pixel values f...

warren commented on Web-based fisheye-removal prototype for correcting lens distortion over 2 years ago

Actually i'm pretty jazzed for the possibility of some of actually doing the lens correction for ...

warren commented on Seeking DC-area folks interested in building temperature sensors for urban heat island measurement over 2 years ago

@stevie was talking about a project with ISeeChange.org in DC -- Stevie, did you have a link, or ...

warren commented on "Use or calibrate calibration" dont show my reference CFL already calibrated over 2 years ago

Hi, can you link to the spectra you're talking about so we can see? Thanks!

cfastie commented on Web-based fisheye-removal prototype for correcting lens distortion over 2 years ago

Right click -- got it! I added the corrected version above. Yes, I think most point and shoot c...

suman commented on Introducing the calibration plugin for ImageJ/Fiji over 2 years ago

Thank you so much for your prompt response Ned...

suman commented on Introducing the calibration plugin for ImageJ/Fiji over 2 years ago

Ohh I get it now. Actually the data has 3 calibration target, but i plan to increase it to 5 tar...

warren commented on Web-based fisheye-removal prototype for correcting lens distortion over 2 years ago

OK, I've just updated with a change that stores the settings in the URL, so you can pass a URL to...

warren commented on Web-based fisheye-removal prototype for correcting lens distortion over 2 years ago

Hm, so the PowerShot S100 actually fudges pixels to correct lens distortion? But you turned that ...

nedhorning commented on Introducing the calibration plugin for ImageJ/Fiji over 2 years ago

Hi Suman - The values from 0 - 1 have been scaled from the original image. The reason I do this i...

BaptisteLeSergent commented on ramanPi - The 3D Printable Raspberry Pi Raman Spectrometer over 2 years ago

Hello, Like Garret said a few days ago, we can't access the hackaday website anymore. Does anyon...

suman commented on Introducing the calibration plugin for ImageJ/Fiji over 2 years ago

Dear Ned Horning, I calculated image calibration coefficients, using the reflectance data from d...

NIR to NDVI

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DIY NIR Test with Filter Kit #1

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