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Winter Moon

MHK 10 Mar 2020

I did a different version of a moon, hope you enjoy it ;-)


Comments

MHK Helpful Friendly User

Anyone know how to get rid of the curvy lines?

Voy Kay Conqueror of Challenges

Underneath is a possible explanation I found on the internet. I got those curved lines myself on a couple of occassions and mostly I simply need to adjust the position of the painting AND/OR the position of the camera to make it (fully) dissappear. Light interference is a factor but my best results I get with natural light, never artificial light.


What are those curvy lines all over my screen when I take a photo of it?
You know, those trippy lines that go all over the screen when I take photo of my monitor with my phone, and the lines go crazy especially when I zoom in and out on my phone. The zooming out phenomenon of the lines moving when I zoom is probably due to resolution, but what makes taking pictures of a printed out photograph different from doing the same on a photograph shown on a screen?


They're called Moiré patterns http://en.wikipedia.org/wiki/Moir%C3%A9_pattern
It's caused by the interferance pattern between the pixel grid in your camera's sensor, the pixel grid on the screen your photographing and the pixel grid on your phone's screen (which is why they change when you zoom)
If you take a picture of window screen or other regular square pattern you can see the same thing. You can even see them in the real world by looking through two layers of wire screens (an apropriate distance appart)
(The reason they're curved is because different parts of the monitor are different distances from the camera sensor so the interferance frequency changes .)

@MHK I also noticed that the patterns happen when I do artificial light photos. So I wait till the next day light to take the picture and position as much as possible opposite to the window.

@Voy: thanks for the links it is super interesting! I was wondering what is this weird and annoying effect when I had to wear two sets of sheer tights.

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