Friday, September 10, 2010

HDR Pictures

Aplle iPhone - HDR Pictures

When you take a picture with HDR on you get two pictures,,This may seem strange but I am having trouble telling which one is the HDR picture.

Is there any way to tell which one is which?

iPhone HDR
Before and after Apple iPhone HDR
It says "HDR" on it right under the "Camera Roll" / back button it is sort of see through but it does say HDR in top left corner and is always the 2nd of the two...

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The HDR photo says HDR in the upper left corner.

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So far not telling to much of a difference.

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BTW, you can go to Settings --> Photos, and set it to keep or remove the Normal

Photo and only keep the HDR version.

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HDR (High Dynamic Range) takes three snapshots. Underexposed, "properly" exposed (normal), and overexposed. It then combines these three to mute out (provide detail) high whites and darks to give you a better exposure overall.

Now, this may or may not be desirable. Typically, HDR photos as taken on an iPhone aren't as soft (good shadow to emphasize something) and warm (darker colors).

Where HDR shines is taking a pic of something in harsh light or where there are a lot of shadow areas (not black holes, just shadowy). If you want to compare "normal" to HDR, take a picture from a few different angles of a bookcase with lots of items on it. In the normal pictures, you'll notice a difficulty in determining color in shadow (like the spine of a book) or the undersides of shelves cloaked in shadow. In the HDR pic, you'll be able to determine color much better and while there will still be some shadow, it won't be as opaque as the normal picture and you'll be able to see detail that's not visible in the normal pic.

It's not magic. HDR isn't going to turn all your photos into National Geographic material. For that, you'll need to practice and learn how to take good pics. For those who are photographers, sorry for all the lay terms. I'm not a photographer. I usually take good pics and sometimes I get lucky and take a phenomenal pic, but I'm definitely not a photographer by any stretch of the imagination.

Just FYI too, you can't have HDR on and flash on at the same time.
Enabling one will disable the other. FYI two, if at the top it says HDR On, then it means HDR is On. You'll know it's on because after taking the pic it'll say saving HDR.

My personal preference is not to turn off the setting to save the normal pic and the HDR pic as it gives me the option later to choose which I like best. Slows things down while taking pics as it has to save both, but I can live with that.

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HDR = High Dynamic Range. It's used when there is more dynamic lighting range to the scene than the camera can handle with one image. So you (or the camera) take two or more images and then combine them, keeping the best exposed parts of each eliminating the blown highlights and lost shadows.

Depending on the desired effect and quality of the merge, the end result can be anywhere from realistic looking "can't tell the difference" to "artsy".

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Which ever is better quality get that one.

:)

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