Gael Varoquaux
Hammersmith bridge and bus light streaks
The Hammersmith bridge, with the streaks of light of two buses running in opposite directions.
This is two different photos that were composited. Using a tripod, I took first shot overexposed and when there were few cars. Then I waited for two buses to cross and took a second shot underexposed. Working from the raw images I denoised separately the two photos using darktable (I used a mix of anisotropic filtering and non-local means), and then I composited them in the Gimp. To composite them, I put the dark one with the streaks of light in a layer on top of the background one and set this layer to "ligthen only" mode.
Hammersmith bridge and bus light streaks
The Hammersmith bridge, with the streaks of light of two buses running in opposite directions.
This is two different photos that were composited. Using a tripod, I took first shot overexposed and when there were few cars. Then I waited for two buses to cross and took a second shot underexposed. Working from the raw images I denoised separately the two photos using darktable (I used a mix of anisotropic filtering and non-local means), and then I composited them in the Gimp. To composite them, I put the dark one with the streaks of light in a layer on top of the background one and set this layer to "ligthen only" mode.