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Have you considered getting a line scan camera for sharper and higher resolution images? I took some train scans with one: https://daniel.lawrence.lu/photos/ ht
by dllu 3y ago
Have you considered getting a line scan camera for sharper and higher resolution images? I took some train scans with one: https://daniel.lawrence.lu/photos/ https://daniel.lawrence.lu/photos/
Incidentally I also built some tech for it: https://github.com/dllu/nectar https://github.com/dllu/nectar but I need to update the readme...
- seabass-labrax 3y agoI remember seeing your photographs on Wikimedia Commons and wondering how you did them - now I know! I always assumed that you just used a very quick shutter with an f-stop of zero :)
- stavros 3y agoI know he told us how already, but that would have left the background sharp, rather than always the same.
- dllu 3y agoI have a huge backlog of photos that I need to contribute to Wikimedia Commons! I'll get around to doing it eventually, hopefully before 2045.
- seabass-labrax 3y agoDo it sooner than 2038 and you get the privilege of 32-bit timestamps on the metadata :)
- mcast 3y agoThanks for sharing, those photographs are very clear and sharp (especially this one: https://pics.dllu.net/file/dllu-pics/boston-pcc.jpg https://pics.dllu.net/file/dllu-pics/boston-pcc.jpg) it seems to tickle my brain.
- cinntaile 3y agoThis reminds me of Wes Anderson movies for some reason.
- bradgessler 3y agoHis style is to shoot his subjects straight-on. Most other movies have the camera at an angle.
- dllu 3y agoI'm a big fan of Wes Anderson's aesthetics and would love to shoot that funicular train from Grand Budapest Hotel (which actually exists --- the Buda Hill funicular) using my line scan camera.
- dllu 3y agoI have three of those actually: https://daniel.lawrence.lu/photos/pcc https://daniel.lawrence.lu/photos/pcc Technically, the photo could be twice the resolution, since the length of the line scan sensor is 4096. It consists of two lines, RGRGRG and GBGBGB. By interpolating the red and blue channels, it would be possible to get images 4096 pixels tall. The challenge is that the two green channels apparently have quite different sensitivity and also each pixel has some variation in sensitivity, which also seems to drift with temperature and settings, so it's quite annoying to calibrate everything properly haha.
- jo-m 3y agoWow, the pictures look amazing! Yes, the look of line scan images were an inspiration for this project. But of course, I also tried to keep BOM costs down and so ended up with a RP4 + RPi Camera.
- dllu 3y agoThe RPi HQ camera is a nice step up from the regular RPi camera while being not too expensive too. Incidentally, I also have a project using that [0] but unfortunately no trains where I live. [0] https://daniel.lawrence.lu/blog/y2022m01d27/ https://daniel.lawrence.lu/blog/y2022m01d27/
- svara 3y agoHow do you get the x scaling right? You have to measure the speed of the train somehow?
- dllu 3y agoWhen the train is moving at a constant speed, you can just scale the image manually to make it just right. If it's moving at a non-constant speed, you can apply a spline or similar to remove the distortion.
- maurits 3y agoYour blog is a gem, thanks for sharing!
- qwertyuiop_ 3y agoWoah the resolution! You can see the earpods on a person behind the tinted windows of Shinkansen.
- dahart 3y agoI love how the line scan camera’s horizontal background makes it look like the trains are moving impossibly fast. Not only are the images sharp & high res, it has a great aesthetic and implies you were tracking an action shot.
- IIAOPSW 3y agoHave you tried the opposite direction? Sitting on the train with the line feed and taking a picture of outside? Like say, a panorama view of the entire run-length of the line, distorted in proportion to the trains turns and accelerations.