Blend It Out

Magazine - Digital Photo Pro, Photography, Software - Photoshop  Comment
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It’s a perfect shot! If only those unwanted moving objects (UMOs, i.e., a person or a crowd) in the scene would disappear. As long as the unwanted elements in your frame move, even just a little, you can make them disappear from your image by taking two or more shots and using Photoshop’s layering and blending capabilities.
You don’t have to retouch your image. Blending is different than retouching. The unwanted elements aren’t covered over with new information by hiding them with replacement information similar to the surround, either from the same source or another. With blends, the information behind the moving subject is revealed. How? It’s contained in the other shot(s).
You even can do this with exposures that are made with slightly different angles of rotation or framing, so you can use this technique with handheld exposures, not just those made with a tripod. Camera motion may make manual registration difficult, but Photoshop automatically will align and, in some cases, distort the separate exposures so that they register precisely …
Read more at Digital Photo Pro.
Learn more in my digital photography ebooks.
Learn more in my digital photography workshops.

Crop or Retouch ?

Magazine - Digital Photo Pro  Comment
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As visual communicators, we’re responsible for everything that’s in the frame; we’re also responsible for everything that’s not in the frame. Deciding what’s in the frame and what’s out is a critical decision that can make or break an image. Here are two essential framing strategies.
1.?Use the frame to eliminate distracting information around a subject.
Take extra care with image information that touches the frame, as it will draw extra attention. Do this with significant compositional elements.
2.?Eliminate space around a subject to focus a viewer’s attention.
A lot of space between the subject and the frame can be used to call on psychological associations with space, such as freedom or isolation. Some space between the subject and the frame can give the appearance of the subject resting gracefully within the frame. Touching the subject with the frame strongly focuses the attention of the viewer and may seem claustrophobic. Cropping the subject with the frame can focus the attention of the viewer on specific aspects of the subject and/or give an image a tense quality, evoking evasion and incompleteness—this often seems accidental if less than half the subject is revealed.
There’s more than one way to apply these strategies. While cropping techniques are simple to practice, the reasons for their application and the choices made about how to apply them, as well as the final effects, may be exceptionally complex. You have two choices ..
1. Reposition the frame before exposure.
2. Contract the position of the borders of an image after exposure
If you plan to retouch, you’ll frame and crop differently …
Read more at Digital Photo Pro.
Find more digital photography techniques here.
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Reduce Color Noise With Photoshop

Magazine - Digital Photo Pro, Software - Photoshop  Comment
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It’s challenging to reduce the luminance (light and dark) component of noise without compromising image sharpness; often it requires a careful application of specialized software.

However, you can easily reduce the color component of noise using Photoshop.

Here’s how.

1    Duplicate the Background layer and turn the duplicate layer’s blend mode to Color.

2    Blur the layer (Filter: Blur: Gaussian Blur).

Be careful not to use the blur filter too aggressively. If contours exhibit reduced saturation, use a lower filtration
Using this technique, only the color of an image will be blurred, not its luminance; image sharpness will not be compromised. Luminance noise will persist; other methods are required to remove it.

This industrial strength technique is most useful when dealing with serious color noise when a Raw converter’s features can’t go far enough, such as the larger areas of color noise found in some images from Bayer pattern demosaicing.

Read more on Noise Reduction here.
Learn more in my digital printing and digital photography workshops.

OnOne Free Plug Ins

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Get 20% off OnOne products with this code – PRINT20 !
OnOne offers free Plug-Ins.
You can add professional photographic effects, frames and backgrounds in Photoshop with just a few clicks with PhotoTools 2.5 Free Edition and PhotoFrame 4.5 Free Edition from onOne. You can also download free Lightroom Presets and Camera Raw Presets to speed up your workflow and instantly add effects. These products are yours to keep (they don’t expire) and will save you hours of time enhancing images in Photoshop and Lightroom.
Learn more about OnOne here.
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Reduce Noise With Dark Slides

Magazine - Digital Photo Pro, Software - Photoshop  Comment
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Some noise is random; some noise is fixed. Hot-pixel noise is fixed. What are “hot pixels”? Photosites on digital sensors that generate brighter information faster than their neighbors. Hot pixels get brighter at higher ISOs, with longer exposures, and in warmer temperatures. You can map where hot pixels are and exactly how bright they get under specific conditions with a dark slide. Then you can use a dark slide to drop out fixed “hot-pixel” noise with a simple postprocessing technique in Photoshop.
To make a dark slide, simply make a separate exposure made at the same ISO, exposure time and temperature as the image you intend to use it with. Exposure of what? Darkness. Leave your lens cap on.
To use a dark slide in Photoshop, open the dark slide and the image you’d like to use it with and drag and drop the dark slide into that image file, holding the Shift key to make sure it’s precisely registered (wait to crop or rotate an image until after this is accomplished). Change the blend mode of the dark-slide layer to Difference and watch the hot-pixel noise vanish.
Learn more about making and using dark slides on Digital Photo Pro.
Learn more about noise here.
Learn more in my digital printing workshops.

Reduce Noise With Multiple Shots

Magazine - Digital Photo Pro, Software - Photoshop  Comment
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Got noise in one exposure? Make a bunch of exposures and watch the noise disappear.
You can reduce noise in an image by combining multiple exposures of the same composition in Photoshop. Photoshop can search for the differences between the separate exposures and then blend them, keeping what stays the same and eliminating what changes. Random noise between separate exposures of the same composition will be substantially, even dramatically, reduced or disappear altogether. (This technique won’t eliminate fixed noise, hot pixels, or column and row noise. There are other techniques for that, like using dark slides.)
You’ll find having this option will greatly reduce any reluctance you have toward using high ISOs. This means two things. You’ll be able to make images in lighting situations you thought you couldn’t, and you’ll be able to make handheld exposures in conditions you ordinarily wouldn’t be able to without severely compromising quality.
So how do you do this? Use the following steps.
1. Shoot multiple exposures.
Try to minimize camera motion as much as possible. It’s not necessary to use a tripod, but it’s helpful2
2. In Photoshop, go to File > Scripts > Load Files into Stack.
3. Click Browse and select the exposures to be used in the Stack and check Attempt to Automatically Align Source Images and Create Smart Object after Loading Layers.
This will create a single Smart Object from the multiple exposures. Double-clicking on this Smart Object will allow you to see the layers separately.
4. Go to Layer > Smart Objects > Image Stack Mode > Median to blend the separate exposures.
You’ll see that the noise is re-duced substantially.
5. Optionally, compare Image Stack Mode > Mean.
This works best for exposures containing no movement.
Read more about this technique at Digital Photo Pro.
Learn more about noise here.
Learn more in my digital printing workshops.