Gyro_Kai
Senior Member
- Joined
- Nov 29, 2006
- Messages
- 3,279
- Location
- near Frankfurt, Germany
- Aircraft
- MT-03, Calidus (rent)
- Total Flight Time
- about 150
(pictures can be enlarged by clicking)
Often, when the flying is good, the visibility is not. When the air is calm, we often have an inversion layer, i.e. fog or even Smog close to the ground. Therefore the pictures usually don’t turn out too well.
However, there is a way to reduce the haze somewhat with most image processing software. My choice of software is Gimp, a public domain program free of charge.
Our object for improvement is the following picture:
If you load this into Gimp you can choose in the menu Colors-Levels
You get the following picture:
This picture shows you the full range of availably brightness from Black at the left to White at the right.
The curve in the middle shows you, how much the photo is actually using from this range. In this case it looses a lot of dark options, and some bright as well. In other words it has very little contrast and most pixels are rather gray.
A photo with more contrast looks like this:
Often, when the flying is good, the visibility is not. When the air is calm, we often have an inversion layer, i.e. fog or even Smog close to the ground. Therefore the pictures usually don’t turn out too well.
However, there is a way to reduce the haze somewhat with most image processing software. My choice of software is Gimp, a public domain program free of charge.
Our object for improvement is the following picture:
If you load this into Gimp you can choose in the menu Colors-Levels
You get the following picture:
This picture shows you the full range of availably brightness from Black at the left to White at the right.
The curve in the middle shows you, how much the photo is actually using from this range. In this case it looses a lot of dark options, and some bright as well. In other words it has very little contrast and most pixels are rather gray.
A photo with more contrast looks like this: