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sandbox-organizing

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waterkeepers

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Messages from the Mississippi: Lesson Plans

7 days ago

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responses

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sandbox-air-sensors

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sandbox-air-quality

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Air-polluting gases and monitoring methods

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sandbox-pm-monitoring

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Software overview

about 2 months ago

MadTinker commented on Build KnowFlow: automatic water moniter over 3 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 3 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 3 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 3 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 3 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 3 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 3 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 3 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 3 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 3 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 3 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 3 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 3 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 3 years ago

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

suman commented on Introducing the calibration plugin for ImageJ/Fiji over 3 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 3 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 3 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 3 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 3 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 3 years ago

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

cfastie commented on Web-based fisheye-removal prototype for correcting lens distortion over 3 years ago

I tried with a photo from a PowerShot S100. That's the only camera I have other than the Mobius t...

warren commented on Web-based fisheye-removal prototype for correcting lens distortion over 3 years ago

But be aware this is pretty beta software! It can crash!

warren commented on Web-based fisheye-removal prototype for correcting lens distortion over 3 years ago

The interface is really minimal at the moment, but i'm planning to make it save settings soon. Bu...

cfastie commented on Web-based fisheye-removal prototype for correcting lens distortion over 3 years ago

What do you mean it will batch them at the bottom? Is the information saved? Or do we have to wri...

warren commented on Web-based fisheye-removal prototype for correcting lens distortion over 3 years ago

@xose if you're testing any fisheye-lensed cameras please give it a try as well!

warren commented on Mobius non-fish eye and small lifter wrapup over 3 years ago

Hi, @patcoyle - managed (with some help) to get the web-based lens distortion removal system work...

warren commented on Web-based fisheye-removal prototype for correcting lens distortion over 3 years ago

OK - the GoPro clones can be corrected with: a: 1, b: 1, Fx: 0.16, Fy: 0.16, scale: 1.087, x: 1,...

Pera commented on What are ways to record ambient temperature every 5 sec and export easily? over 3 years ago

Hi Caroline! I could post this on the DC Women and Bicycles forum and a couple other bike groups ...

cfastie commented on Mini Pearl Jam over 3 years ago

The Mini Pearl Logger in the compost pile stopped logging today when the battery voltage dropped ...

warren commented on Web-based fisheye-removal prototype for correcting lens distortion over 3 years ago

This was solved today by SpaVec! https://github.com/jywarren/fisheyegl/issues/3#issuecomment-315...

EPA hazard review of toxic chemicals stalled

by Shannon over 9 years ago

Hydrogen sulfide sensing brainstorm

by warren over 9 years ago

Open Hardware SCHOLARSHIP - deadline sept 14th

by warren over 9 years ago

A new camera capsule tail

by warren over 9 years ago

UAVs and Agriculture

by gonzoearth over 9 years ago

I sent the article to clippings too...

by adam-griffith over 9 years ago

PLOTS map tools walkthrough

by gonzoearth over 9 years ago

Env. Justice mandate strengthened

by Shannon over 9 years ago

SF Gate: Man caught attempting DIY fission

by warren over 9 years ago





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New page by stevie 1 day ago

sandbox-organizing

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waterkeepers

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responses

New page by bhamster about 1 month ago

Research Area Reviews Archive

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sandbox-air-sensors

New page by bhamster about 1 month ago

sandbox-air-quality

New page by bhamster about 2 months ago

sandbox-pm-monitoring

New page by warren about 2 months ago

Software overview

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