First on a final renderings.

Brief

Recently been pondering this new buy raspberry pie 3B of any use, then I thought it was filmed with time-lapse photography Go Pro. See the Raspberry Pi and NoIR camera in my hand, I think I simply have to try the water better. Thus it was on the map. Saturday (2017.12.16) afternoon got the idea and started to implement, and today (2017.12.17) afternoon, and then write this article Xinggui map has been rendering good, is also a video rendering.

device

This time using a newly purchased Raspberry Pi 3B and official NoIR camera software uses a lite version of the system, this version eliminates a lot of unnecessary parts, such as what desktop environment, the purpose is to save power. At the same time I set 1050MHz overclocked to facilitate the return data is not in Caton shooting. Because it is outside, so to do by my power supply mobile power capacity is ten thousand mA. Performance was good, from 4:00 in the morning to eight o'clock last night, a total of 8 hours of shooting time plus waiting for me to get up and return data, a total of 13 hours, charging treasure when I left last cell recovery power (a total of four-frame), if not because of cold weather, I think we should also rest some more.

After overclocking the primary problem is the heat. However, this Beijing night, although not keep up Mohe so cold, but winter here Force general's also very powerful. Even wifi full load, camera shooting, simultaneous file transfers, for a long time so the temperature is only 21 degrees Celsius, but usually only when the temperature is low shooting to 16 degrees Celsius.

Finally, a place I used a simple box ten minutes making.

Shooting

About the shooting, I use the tools provided by the official raspistill. Complete command as follows:

raspistill -bm -tl 800 -v -set -t 28800000 -r -q 100 -ISO 125 -ex verylong -awb off -awbg 1,1-ss 9000000 -o?6d.jpg

The implication is that in the next 8 hours (28800000ms), after shooting a photo every pause 0.8s (800ms), the exposure time 9s (9000000s), save the file name is the number of frames in the format of jpeg.

About adjusting the focus, initially in accordance with the Internet, said screwed directly to infinity, this does not work, you need the actual situation to a recycling collection job.

Post-processing

8 hours after the shooting, after screening received a total of 1026 photos.

Rendering static Xinggui

This uses Startrails software production. Then using Photoshop toner, basically only the white balance adjustment, brightness and did not move. After using the Photoshop Camera Raw filter, the white balance by taking the middle of the selected color yellowish Xinggui everything will be fine.

Use Photoshop to make

Produced by Photoshop, then slightly for the computer test, I did not succeed. My dual E5 workstation uses three hours to open all of the more than a thousand photos, and later spent three hours taking the maximum of these photos by calculation, and the final file size must be psb Large Document Format save, the total size of 156GB. The effect of the above Startrails software to make the effect of no big difference. So, it overkill.