Tag Archives: small

Tests

Experiment #2: A Hint

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Here are the three source images:

The differences among them are obviously in the amount of noise that was added to the image. No noise was added to the first image – any noise there was in the original capture. 10% level “Uniform” noise was added to the second image in Photoshop. 20% “Uniform” noise was added to the third image in the same way.

The soft photograph was chosen to avoid masking the noise with a lot of other sharp detail – this image provides very smooth gradients from black to white, where noise is typically easier to detect. I also chose this image because it is nearly – but not quite – monochromatic. This meant that I could increase the effect of the noise by using color noise rather than limiting to monochromatic noise – and that the color noise would tend to be more visible against the nearly monochromatic background.

The original set of 6 jpgs includes two from each of the three versions shown here. For last-minute fun you could still visit the comment page and try to a) determine whether or not the differences are visible and b) which pairs of images are the least noisy, more noisy, and most noisy.

More information to come later this evening.

G Dan Mitchell is a California photographer and visual opportunist. His book, “California’s Fall Color: A Photographer’s Guide to Autumn in the Sierra” (Heyday Books) is available directly from him.

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Photographs: Central California, Photographs: Nature, Photographs: Northern California, Photographs: Sierra Nevada, Photographs: Yosemite

Dry Creek and Late-Season Meadow

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Dry Creek and Late-Season Meadow

Dry Creek and Late-Season Meadow. Yosemite National Park, California. September 10, 2009. © Copyright G Dan Mitchell – all rights reserved.

Morning light illuminates a dry creek bed winding though late season meadow grasses and trees near Fletcher Lake, Yosemite National Park, California.

As the trail at Fletcher Lake heads upward to begin the climb towards Evelyn Lake there is an area in the meadow to the left of the trail where small trees have begun to infiltrate the meadow and there is now a “mini-forest” of sorts. I’ve photographed this spot – this exact spot, actually! – before, and I often like to shoot it in the morning light when the low angle sun first hits the meadow. Here a dry seasonal runoff creek winds between the trees in this section of mixed meadow and young forest.

This photograph is not in the public domain and may not be used on websites, blogs, or in other media without advance permission from G Dan Mitchell.

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Photographs: Nature, Photographs: Sierra Nevada

Three Aspen Trunks, Lichen Covered Rocks

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Three Aspen Trunks, Lichen Covered Rocks

Three Aspen Trunks, Lichen Covered Rocks. Sierra Nevada, California. October 3, 2009. © Copyright G Dan Mitchell – all rights reserved.

Three small aspen trees with fall color leaves among small plants grow from a crack in lichen-covered rocks – Sierra Nevada, California near South Lake.

Yet another variation on the “bare aspen trunks with some leaves, photographed against granite” theme – I can’t help myself! :-)

This is another of several photographs I made along the road below Parcher’s Resort on the way to South Lake in the eastern Sierra above Bishop, California. At this early October point in the season there are almost endless ways to approach photography of aspens – still-green aspens, aspens barely starting to change color, newly colorful aspens among still-green aspens, aspens at the height of their yellow/orange/red color, aspens past peak starting to thin a bit, aspens with only a few beautiful leaves remaining (and the rest littering the ground beneath), aspen trunks bare of any leaves and waiting for the winter to arrive – and all of these shot in an infinite variety of light, in an infinite variety of settings, with an infinite variety of compositions.

So I hope no one minds if I continue to post a few more. :-)

This photograph is not in the public domain and may not be used on websites, blogs, or in other media without advance permission from G Dan Mitchell.

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Photographs: Nature, Photographs: Sierra Nevada

Dense Aspen Grove, Autumn

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Dense Aspen Grove, Autumn

Dense Aspen Grove, Autumn. Sierra Nevada, California. October 3, 2009. © Copyright G Dan Mitchell – all rights reserved.

Small trees grow closely together in a dens aspen grove near South Lake, Sierra Nevada, Callifornia.

I have photographed this dense stand of Sierra Nevada aspens below South Lake in the past. I first found it a year ago while exploring a short gravel road off to the side of the main road to South Lake, and I’ve come to like photographing it in late afternoon, evening, or cloudy light – all of which diffuse and soften the light, allowing more visibility into the center of the very dense trees.

This year the leaf color was not nearly as intense in this grove as it was when I visited last year, though here I think the complexity of the branch patterns shows up better. (Though that will be almost impossible to see in this small jpg version – I’ve tested for a print at 10″ x 30″ size where the detail is more clearly seen.)

This photograph is not in the public domain. It may not be used on websites, blogs, or in any other media without explicit advance permission from G Dan Mitchell.

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