Public Lab Wiki documentation



Spectral Workbench

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What is Spectral Workbench?

SpectralWorkbench.org is a web based application to collect, archive, share, and analyze spectral data, for Public Lab DIY spectrometers and other spectrometers.

With it, you can:

  • connect your USB Desktop Spectrometry Kit
  • scan and save samples
  • wavelength calibrate your spectrometer
  • plot light intensity as a function of wavelength (average digital consumer cameras have a range of 400 to 700 nm)
  • create sets of multiple spectra to visually compare and analyze scans
  • download CSV data for offline analysis
  • view others' data and discuss
  • find similar data in a database of over 60k spectra

No download is required -- just a web connection. The Chrome browser works best, but most standard-compliant browsers are supported. It is possible to use from an Android smartphone, preferably with the Firefox browser which allows you to specify which camera to look through.


Contents


Intro video


Development

Do you code? The codebase of Spectral Workbench is available at https://github.com/publiclab/spectral-workbench. The server is written in Ruby on Rails, with a lot of client side code in JavaScript. You can read about the JavaScript API here.

We really need more developers, so if you are interested, please get involved! A great place to start is the "plots-dev" mailing list for software developers: http://publiclab.org/wiki/developers


FAQ

We're collecting and working our way through a range of questions about Spectral Workbench -- if you can contribute your own questions, or answer others', please do!

Title Author Updated Likes Comments
What light sources might I use to calibrate my spectrometer if I don’t have a CFL available? @mimiss 3 months ago 3
Problem whit workbench spectra. Unable to manipulate(work) whit any image @damian_orovitz 3 months ago 1
copying calibration issue @kog62290 7 months ago 1
Spectral Workbench so slow on raspberry pi zero @danieisnietgek 8 months ago 3
How do I select the back camera of the smartphone? @renatoianhez about 1 year ago 1
Sorry for asking such a elementary question, what does the intensity % means? Can it shows how strong the light source is? Is it in terms of lux? @willieong about 1 year ago 1
Can you calibrate this? @jela0194 about 1 year ago 0
Is copy calibration on Spectral Workbench working? @microfibers over 1 year ago 1
How do I get the webcam feed on Spectral Workbench? @KenSuke over 1 year ago 1
How do I search for the spectra recorded by a specific user? @nnn16 over 1 year ago 5
Can detect the camara,but can't show image @JHYeh over 1 year ago 1
Spectral Workbench 1.0 seems much more stable than 2.0 and works well for the basic analysis I am trying to do, can I get access to 1.0 without being pushed to 2.0? @B-winters over 1 year ago 1
Instruction videos don't work! @aemilius89 over 1 year ago 4
changing default webcam @julietalemus over 1 year ago 2
How can I connect my gopro to SpectralWorkbench software? Is there other open software that would? @CD3000 over 1 year ago 3
Only seeing part of color spectrum @msolomon over 1 year ago 6
copying calibration issue @ceberndsen almost 2 years ago 0
Standalone Spectrometry software & uploading JPG or PNG spectra @lach_myers almost 2 years ago 7
My uploaded file will not process. @JadaBada about 2 years ago 3
How can I get the absorption spectra once I have calibrated my spectrometer data? @amenzel8 about 2 years ago 1
Why do raw RGB values differ from calibrated RGB values? I thought calibration just set pixels to wavelength (nm)? @troyb about 2 years ago 17
Bug : Impossible to calibrate this mercury vapour spectrum @SarahC about 2 years ago 2
Bug? My Spectrum loads then vanishes. @SarahC about 2 years ago 2
Amazon UK - Link for perfect CFL? All mine are wide spectrum phosphor! @SarahC about 2 years ago 5
Has anyone experienced difficulty to log in this site? I having the trouble since yesterday. Not just log in, but to save spectrum too (sometimes can log in but take a long loading). sorry for my bad english. @silvi_ap51 about 2 years ago 9
The spectrum gets vertical no matter how I upload the picture. @wangdydu over 2 years ago 8
comparison betweeen spectra made by manufacturer and spectralbench? @miramon over 2 years ago 3
How do I use SpectralWorkbench.js to auto-calibrate? @shenzj1994 over 2 years ago 0
Can you get color temperature from spectra @miramon over 2 years ago 2
Can I get a file of numbers instead of a graph from the foldable spectrometer software? @mountevans over 2 years ago 4
I can't enter a password when I try to login to Spectral Workbench. So I can't log in at all. @storacremu over 2 years ago 6
CSV files from spectra @Dr_Z over 2 years ago 3
I want to know a method to quantify milk proteins using the foldable mini spectrometer, Is this possible? @julsmill over 2 years ago 3
I want to know a method to quantify milk proteins (cow milk, almond milk, coconut milk, oat milk) using the foldable mini spectrometer, Is this possible? @julsmill over 2 years ago 1
How to use the API to export a constant stream of data? @Reallygeek over 2 years ago 7
How do we confirm the current version of the software? @quencher over 2 years ago 4
How should i go about converting svgs to jpgs or pngs @Flameytail over 2 years ago 3
Does anyone know what image processing spectral workbench does to find intensity at wavelength/ where to find the coding for that? @Reallygeek over 2 years ago 10
Calibaration or switching scale? @jayjay70 almost 3 years ago 1
Delete my profile? @MEC08 about 3 years ago 1
Starlight Recorder KIC8462852 @LightWaveResearch8000 about 3 years ago 1
How To Make Time Lapse Spectrometer @LightWaveResearch8000 about 3 years ago 2
"Use or calibrate calibration" dont show my reference CFL already calibrated @JSAENZ about 3 years ago 1
Image is blue - First time @LightWaveResearch8000 about 3 years ago 3
Copying Calibration @Ridwane about 3 years ago 1
Suppression of background light @saeed957 over 3 years ago 3
Cannot find colour spectrum @SpencerH over 3 years ago 2
Fraunhofer Lines at higher resolutions? @stef over 3 years ago 2
What are the units on the X axis for the spectrum capture for the Desktop Spectrometry Kit 3.0 @Schoster over 3 years ago 2
Save and Download buttons -where does the file save or download to? @testtube over 3 years ago 2
How to get spectral data in excel or other formats @suha over 3 years ago 4
orientation of slit vs that of diffraction grating @wlkwong over 3 years ago 2
Spectral Workbench recording time? @dhale2 over 3 years ago 4
Calibration of spectra fails @Paul_P over 3 years ago 13
Why copy calibration does not apply? @aelobo over 3 years ago 1
Intensity for spectra too low? @chuynh451 almost 4 years ago 4
Error on calibrating uploaded spectrum @sarahcm almost 4 years ago 9
how to delete my spectra on Spectral Workbench @redleon almost 4 years ago 1
Calibration Issues with larger images @Anmar almost 4 years ago 8
Can i upload csv files on spectralworkbench for calibration and other purposes? @shubham almost 4 years ago 1
Question: Using a webcam with a image resolution of 1920x1020 @seko about 4 years ago 1
How to rename a set on Spectral Workbench? @AndrewJamesLaplante about 4 years ago 4
Question: How do I get the calibration user interface? @PeterDH about 4 years ago 3
Question: Why average? And what happens to the second Green? @viechdokter over 4 years ago 10
Difference CFL and Tube light? @Joris over 4 years ago 5
Question: desktop spectrometer 3.0 light sensitivity @Joris over 4 years ago 1
Question: Why won't the spectrum plot show once the image has been uploaded? @litar over 4 years ago 6
Question: Focus on mobile phone @clownfish over 4 years ago 1
Question: ccd camera on metascop @leanr over 4 years ago 7
Getting the spectrometer to work with a Raspberry Pi? @anjohn12 over 4 years ago 6
Automated captures? @viechdokter over 4 years ago 10
Question: total beginner problems @viechdokter over 4 years ago 9
Question: Spectrometer using photosensor @Abhay7417 over 4 years ago 1
Question: How do I save the calibration data? @mokeymark over 4 years ago 21
Question: Micro volume spectrometer using arduino and light detecting resistor. @Abhay7417 over 4 years ago 5
Question: can't save spectrum anymore @eigentuininhuis over 4 years ago 9
can't get the calibration right @eigentuininhuis over 4 years ago 3
What size (width and height) of the image to vertical upload (blue top) in SpectralWorkbench? @asasergio over 4 years ago 4
Question: How do I measure the absorption spectrum of a sample? @lucca_fabani over 4 years ago 5
Calibrating @daniel94 over 4 years ago 5
Question: What does the vertical scale mean? @someHerrings over 4 years ago 6
Question: Is there a way to delete a set of spectra from the spectral work bench? @ethanbass almost 5 years ago 6
Question: Help @porbe almost 5 years ago 2
Question: Why I can not upload images to calibrate @congminhqt almost 5 years ago 7
Question: downloading spectrum @mebaumga about 5 years ago 1
Question: Stray light correction @SIMJEDI about 5 years ago 0
Question: Colorimetry using the desktop spectrometer @mattiecaroline1991 about 5 years ago 0
Question: deep UV @mebaumga about 5 years ago 5
Question: @edilberto over 5 years ago 1
Question: "live" compare to camera feed @wecapa over 5 years ago 3
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Troubleshooting

If you feel you've encountered a bug with the software -- very possible! Please look through existing issues listed here, file a new one if you don't see something similar, and help to add any observations to existing issues shown here.

Thanks for helping improve this open source software!

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