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Adjusting sharpness and reducing noise

From: iPhoto '11 Essential Training

Video: Adjusting sharpness and reducing noise

Let's take a look at the Sharpness and De-noise sliders here in the Adjust pane, and we'll go to Full Screen mode because I've got two images up. We're going to look at sharpness here, and then we'll use this shot for looking at noise and what to do about it. Now, I'm going to be honest with you, these are not my two favorite sliders in iPhoto. I think their implementation could be better but let me show you that. I mean, it's-- I could ramble on about that for some time and I think I can.

Adjusting sharpness and reducing noise

Let's take a look at the Sharpness and De-noise sliders here in the Adjust pane, and we'll go to Full Screen mode because I've got two images up. We're going to look at sharpness here, and then we'll use this shot for looking at noise and what to do about it. Now, I'm going to be honest with you, these are not my two favorite sliders in iPhoto. I think their implementation could be better but let me show you that. I mean, it's-- I could ramble on about that for some time and I think I can.

A picture is worth so much Derrick yacking. So I'm going to zoom-in on this shot a bit. You can just put the mouse where you want and click the 1 key and you go to 100%. Let's play with Sharpness. So we're just going to move Sharpness over and you can see what it does to this image. I'll hit the Shift key and you can see the difference. Now here's the reason why I don't like this particular Sharpening filter very much because look at the sky.

I mean when you want to sharpen something, you want to sharpen objects but you don't want to sharpen the sky because when you sharpen the sky what you get is noise. You can see how it increases the noise in the sky, and you also increase chromatic aberration here and it's just not very elegant. So, my advice is, let's zoom-out so you can also see it that way, which is you want to look at Sharpness at 100% and then at normal view. So now we can look at this way and then we can hit Shift and you can see the difference.

This is too sharp. This creates artifacts. So my recommendation is if you're going to use the Sharpness filter in iPhoto, be modest, take down here, show restraint. Keep it low so that you don't introduce noise and you don't introduce artifacts. Okay, now let's look at some noise. So we will go over here, and I will just put my mouse right here and we'll go to 100%. Let's go to 200%. So I hit the 2 key and this is all noise here, okay? This graininess that you see.

Now this here, this is called chromatic noise, this color noise. And again, this happens in the dark areas usually of shots that are recorded at higher ISOs. 800, 1600, up around that neighborhood. It's not necessarily a bad thing. When you make a print, sometimes noise just kind of adds a bit of subtle texture. But in order to illustrate how De-noise works, we're going to blow it up to 200% and then I am going to slide the slider, and you can see that it does reduce the noise.

I am going to hit Shift, there it is before De-noise, and here it is afterwards. Now sometimes what you have to look out for with noise reduction is what we call smearing, where you start to lose some detail also. So again, you want to be careful with this and remember you're not going to be looking at your shots at this high magnification. So you can move them down like this. Here's some noise here. We're at 100% right now. You can see, I am looking at the globes right here.

You can kind of smooth them out a little bit, but I would show restraint when using this slider. Now, one of the things that we're going to talk about in an upcoming movie is using other image editors in conjunction with iPhoto. It's called round-tripping, where you get to send a photo to let's say Photoshop, work on it there, and then bring it back into iPhoto. The process actually works really well. This is an instance where I think round-tripping would be a good idea. If you really need to do some sharpening or some noise reduction, Photoshop handles that better than iPhoto, especially for shots that are going to be very important to you, like portfolio shots.

But for everyday use, as long as you don't go too far with these sliders, these will work. They're just not the best sliders in iPhoto.

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This video is part of

Image for iPhoto '11 Essential Training
iPhoto '11 Essential Training

76 video lessons · 21994 viewers

Derrick Story
Author

 
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  1. 4m 58s
    1. Welcome
      1m 9s
    2. Using the exercise files
      1m 49s
    3. What's new in iPhoto '11?
      1m 39s
    4. OS X Mavericks 10.9 iPhoto version update NEW
      21s
  2. 20m 33s
    1. Preparing to install iPhoto '11
      3m 2s
    2. Launching iPhoto for the first time and updating your existing Library
      4m 4s
    3. Importing images from your camera
      4m 50s
    4. Importing photo files
      4m 3s
    5. Importing movies
      2m 17s
    6. Working in Full Screen view
      2m 17s
  3. 40m 53s
    1. Importing the exercise files and organizing by Event
      1m 59s
    2. Understanding Events
      3m 43s
    3. Hiding photos
      1m 50s
    4. Flagging photos
      3m 3s
    5. Finding people using Faces
      3m 52s
    6. Adding people to Faces
      2m 8s
    7. Managing the Faces corkboard
      2m 14s
    8. Organizing by location with Places
      2m 9s
    9. Geotagging images
      7m 4s
    10. Creating albums
      1m 54s
    11. Viewing albums in Full Screen mode
      3m 37s
    12. Creating Smart Albums
      3m 36s
    13. Creating folders
      1m 46s
    14. Exploring the Project view
      1m 58s
  4. 17m 15s
    1. Understanding metadata
      3m 1s
    2. Rating your photos
      4m 27s
    3. Displaying photos by rating
      2m 57s
    4. Adding keywords
      3m 13s
    5. Finding photos by keyword
      3m 37s
  5. 29m 6s
    1. Switching to Edit mode
      2m 3s
    2. Cropping photos
      3m 30s
    3. Straightening photos
      1m 37s
    4. Making automatic corrections with Enhance
      2m 18s
    5. Removing red-eye
      3m 5s
    6. Retouching photos
      3m 10s
    7. Rotating photos
      1m 39s
    8. Using the Effects palette
      4m 8s
    9. Duplicating photos
      3m 5s
    10. Reverting to the original
      2m 4s
    11. Comparing photos while editing
      2m 27s
  6. 34m 53s
    1. Working in the Adjust tab
      1m 0s
    2. Adjusting levels
      4m 12s
    3. Adjusting exposure and contrast
      3m 31s
    4. Adjusting color saturation
      3m 43s
    5. Adjusting definition
      2m 10s
    6. Adjusting highlights and shadows
      2m 26s
    7. Adjusting sharpness and reducing noise
      4m 19s
    8. Adjusting temperature and tint
      4m 19s
    9. Copying adjustments and pasting them to multiple photos
      3m 51s
    10. Working with RAW files in iPhoto
      5m 22s
  7. 25m 42s
    1. Emailing photos from iPhoto
      4m 22s
    2. Emailing photos the old-fashioned way
      4m 5s
    3. Setting up your email account in iPhoto
      3m 43s
    4. Sharing your photos via Facebook
      3m 16s
    5. Sharing your photos via Flickr
      4m 35s
    6. Sharing your photos via MobileMe
      1m 26s
    7. Creating a web gallery
      4m 15s
  8. 20m 59s
    1. Creating a slideshow
      1m 46s
    2. Customizing slideshow settings
      5m 2s
    3. Exporting a slideshow to QuickTime
      4m 19s
    4. Managing movies in your iPhoto library
      5m 26s
    5. Creating a DVD from iPhoto
      4m 26s
  9. 41m 45s
    1. Exporting photos
      4m 57s
    2. Printing photos
      7m 57s
    3. Ordering prints
      2m 22s
    4. Creating a calendar
      7m 11s
    5. Creating a photo book
      7m 40s
    6. Selecting output options for your photo book
      4m 6s
    7. Creating greeting cards
      4m 15s
    8. Setting output options for your greeting cards
      2m 11s
    9. Viewing all your calendars, books, and cards
      1m 6s
  10. 16m 14s
    1. Customizing iPhoto preferences
      7m 7s
    2. Burning a backup CD or DVD
      4m 37s
    3. Backing up to an external hard drive
      1m 53s
    4. Creating iPhoto libraries and switching between them
      2m 37s
  11. 1m 45s
    1. Final thoughts
      1m 45s

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