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Not so much progress on the noise side – I tried to reduce chroma noise with an option in UFRaw. The result is, well, see yourself in the image above (200% view).

1 – the noisy image

2 – the denoised image

3 – the denoised image with chroma noise reduction

4 – 1 and 3 combined with a mask for the edges.

I’ll explore soe more noise reduction options before I finish this image.

In the main part of this video you’ll see how to register an additional image into the already rotated and cropped  stack of layers.

The TOC:

Reducing Chroma Noise in UFRaw 03:00
Register an additional image into the layer stack 06:00
Moving the layer to a register point 06:30
Setting the center point for rotation 08:40
Cropping the layer to the image size 13:20
Checking the results 14:00
Recap 15:30
Why the Neon Filter? 16:20
When is an image finished? 18:10
Save as a new one layer image 19:40

This work is licensed under a
Creative Commons Attribution-Share Alike 2.0 Germany License.

Tags: chroma noise, noise, register
Posted in Gimp, Gimp video tutorial | 5 Comments »

 Podcast Video (41.3 MB): [24:58m]: Download
 Torrent: Download

This week I’ll answer the first search term that led according to the logs someone to „Meet the GIMP!“. “Getting rid of people in GIMP“ was the question. And here, about 9 months later, is the answer.

I took two shots of the same scene with my point and shoot camera to remove some moving cars (the runner shown here was just an accident. But I like the idea and will do a “real” one soon). I used a technique similar to that shown in episode 44, only this time a bit more sophisticated using layer masks instead of the eraser.

But I had no tripod and no beanbag. So unintentionally I moved and rotated the camera between the shots. Registering (adjusting them to a perfect fit) is the largest part of the work to be done. This involves the selection of a point of reference, moving the top layer, setting the centre of rotation and finally rotating the top layer. With more than two layers this has to be repeated for each layer.

I hadn’t thought that this would work out so good and easy. You can just shoot any public place without moving traffic if you make enough images. Imagine a big crossing, all traffic lights red.  And you don’t need the tripod. OK, it’s better with….

Some links, as promised:

The exhibition in Hannover’s Sprengel Museum and the formidable book from the museum, in German and in English. Helen Levitt in Wikipedia, an interview with her on NPR and some images on “Masters of photography”

The file with the images from the podcast is at the usual spot.

This work is licensed under a
Creative Commons Attribution-Share Alike 2.0 Germany License.

Tags: layers, masks, register, remove moving objects
Posted in Gimp, Gimp video tutorial | 10 Comments »