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peterhinch / micropython-nano-gui

A lightweight MicroPython GUI library for display drivers based on framebuf class
MIT License
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Ref README.md - photographing OLED display images #30

Closed PaulskPt closed 2 years ago

PaulskPt commented 2 years ago

Hi Peter, I just read the contents of README.md from this repo because I want to try to use this repo. In this README.md you wrote: OLEDs are visually impressive displays with bright colors, wide viewing angle and extreme contrast. For some reason I find them hard to photograph..

I am not a photographer. Regularly I take photographs of hardware setups and of images on displays. Usually, to be quick, I use my iPhone to take photographs. My experience using this mobile phone to take photographs of displays is not overwhelmingly positive. I also own a Canon PowerShot G7X Mk II camera. With that camera I have much better success in making photographs of displays. The Canon Camera can deal better with the big brilliance of the OLED displays because you can set diaphragma, shutter time etc. The camera of the mobile phone is more automatic controlled thus more limited in adjustments by the user; in this case resulting in blurry characters (as shown below) and in other occasions showing artifacts too.

Below a comparison: image 1 taken with an iPhon8Plus; image 2 taken with the Canon PowerShot mentioned above.

Image 1: IMG_3488

Technical details of image 1:

IMG_3488_info

Image 2. I did not take too much time adjusting settings of the Canon camera. I am sure that if I did, the quality of the image would be even better.

2022-01-03_23h18_

Technical details of image 2:

2022-01-03_23h18_info

peterhinch commented 2 years ago

I have recently learned a bit about photographing displays. The trick is to put everything in manual mode, shutter speed, aperture and focus. Clamp everything securely and avoid very short exposures. Here is an example.

Image

PaulskPt commented 2 years ago

Excellent!

peterhinch commented 2 years ago

A couple of points I missed. Ensure a minimum amount of ambient light: I photograph in evening, but you could devise some kind of shade. Secondly, if colors are washed-out, there is local overexposure: reduce aperture.

Good luck!