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From the website: If I ever find a good moving prop like a small fan, maybe I'll also re-shoot new previews to demonstrate how shutter speed affects moving obj
by moon2 8mo ago
From the website:
If I ever find a good moving prop like a small fan, maybe I'll also re-shoot new previews to demonstrate how shutter speed affects moving objects.
Now, I'm just not sure how would one simulate a running fan with a picture. While for a static image you can have separated foreground and background and then apply effects for simulation (I know iPhone HEIC images have this property), for moving images you have to simulate the blur and the stillness, which is probably more difficult in terms of coding.
- andyfilms1 8mo agoI love the idea that this guy was easily able to scrounge up a florescent bulb in a beer coozie, but a desk fan is somehow unobtainable.
- nomel 8mo agoWhy simulate? Most modern cameras can be controlled through USB. Just actually take each one (except for ISO, which you can easily fake), encode the frames in a reasonable bitrate MP4, then have a lookup for the frame in the video. :D
- internetter 8mo agoThis would require 18000 frames
- moon2 8mo agoIf you consider how long lower speed shutters will take and the aperture combinations, it would take a long time to take all the pictures and would stop being feasible.
- nomel 8mo agoHow so? Longest shutter on the page is 0.5 seconds. If every single picture was at 0.5 seconds, that's only 2.5 hours of exposure.
- nomel 8mo agoSo what. That's a little over an hour [1], and you're done! Some smallish JPG is all that's presented here anyways, so using a reasonable MP capture to JPG should easily fit on its SD card. Also, there's around 4600 that are pure white, and something near that that are pure black, for the scene above (although more dynamic range would be very cool). [1] 18000 * 0.5s shutter / 3600 = 2.5 hours for worst case shutter, /2 for average = 1.25 hours of exposure.
- moon2 8mo agoI don’t know if I follow. You mean to keep a fan moving, take pictures with all the different combinations (aperture and shutter speed). Then merge on an MP4 file that you can lookup somehow the setting combo with the frame? Sounds… reasonable I guess! I guess it can be simpler than I imagined. The owner of the site just needs a fan :-)
- PetitPrince 8mo agoAh ! Guilty as charged in not reading the whole page. > Now, I'm just not sure how would one simulate a running fan with a picture. I don't think it's necessary for this app. This is simulating what the camera sees, not what our eyes can see.