Question: The spectrum gets vertical no matter how I upload the picture.

Hi, I believe you should be able to rotate the picture after uploading, but there should also be a "vertical" checkbox you can check or uncheck -- do either of those ideas work?

Can you link us to your spectrum so we can see?

I'm am having a similar issue here: trying to upload and cal for the 1st time, on a paper spectrometer with a Pixel phone. No matter if I check the vertical or not I get my image displayed in the calibration as "Calibration01 rotated' above: vertically. After several unsuccessful attempts I rotated the original jpg on my desk them uploaded that. This then displayed the spectra horizontally however the lines have severe curves to them which I think is preventing the software from finding/displaying the peaks as I see them; hence, a failed cal. I'm guessing I need to get the image better centered on my camera lens to get straighter lines, so I'll play with that. (I assume you can look at the images from me, McL, so I won't post them here...)

hi, i believe this is a new bug! Would you be able to open an issue at https://github.com/publiclab/spectral-workbench/issues please, and we can try to follow up? Thank you!

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McL wrote:

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I'm am having a similar issue here: trying to upload and cal for the 1st time, on a paper spectrometer with a Pixel phone. No matter if I check the vertical or not I get my image displayed in the calibration as "Calibration01 rotated' above: vertically. After several unsuccessful attempts I rotated the original jpg on my desk them uploaded that. This then displayed the spectra horizontally however the lines have severe curves to them which I think is preventing the software from finding/displaying the peaks as I see them; hence, a failed cal. I'm guessing I need to get the image better centered on my camera lens to get straighter lines, so I'll play with that. (I assume you can look at the images from me, McL, so I won't post them here...)

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I was having the same problem with my spectrum always going vertical, but I fixed it by using Paint 3D to rotate and crop the original image. I saved the image I cropped from Paint 3D and it worked.

I found how to solve this problem, and it seems to be simple enough. Zoom in, zoom further in , and if your smartphone has M mode, use it to make sure you take photo at same zooming every time. And you have to adjust your device to make sure the spectrum is still centered after you zoomed in. Sorry for ignored this for months, I just forget this thing after I finish that course. Hope this helps.

I found how to solve this problem, and it seems to be simple enough. Zoom in, zoom further in , and if your smartphone has M mode, use it to make sure you take photo at same zooming every time. And you have to adjust your device to make sure the spectrum is still centered after you zoomed in. Sorry for ignored this for months, I just forget this thing after I finish that course. Hope this helps.