Aperture 2.0’s Hue Selector
Posted February 19th, 2008 @ 12:24pm by Erik J. Barzeski
Sometimes Aperture 2.0's hue selector yields some surprising results. Moving around within this bright sun, I can grab just about every color: blues, yellows, greens, reds, oranges, purples…
That makes sense, and should serve as a warning: don't try to select hues in super-bright or super-dark areas, or you'll get similarly surprising results.
You can also be tricked in other ways. In some other sunset images, I tried to grab what I thought were streaks of blue in the sky, but the actual pixels were red. The sky only appeared to be blue in that region because, compared to the rest of the true red/orange sky, that region had a little bit more blue… but not enough to make blue the dominant color and thus what the hue chooser would display and select.
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Posted 19 Feb 2008 at 3:50pm #
Choosing the hue of an (almost) white area seems like it will pretty much get random results. That's hard in general, right?
The second problem seems like the specific issue that they're looking at the hue of one (or a small #) of pixels.. but once again isn't this expected?
Maybe I don't understand the tools..
Posted 19 Feb 2008 at 4:35pm #
[quote comment="46104"]Choosing the hue of an (almost) white area seems like it will pretty much get random results.[/quote]
Yeah. Additionally, we're tricked into seeing that sun as pink rather than virtually white (slightly yellowish).
[quote comment="46104"]The second problem seems like the specific issue that they're looking at the hue of one (or a small #) of pixels.. but once again isn't this expected?[/quote]
I believe it's just one pixel, just like the white balance tool. I would like to see a feature added to Aperture that allows users to choose between a 1x1, 3x3, and 5x5 grid for both the white balance and hue selection tools.
Posted 20 Feb 2008 at 7:46pm #
If you zoom in with the loupe, you can see that it's actually a 3x3 grid that it is sampling.