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Basic image manipulation

From: Computer Literacy for the Mac

Video: Basic image manipulation

Many times the photos you shoot might not come out as good-looking as you had hoped for. Maybe the picture is a little too dark or bright, maybe some stranger's walking through the background, or maybe there is a slight color tint to the photo. In this movie, I am going to show you some basic image editing techniques you can apply in iPhoto. Again, you will find many similar tools available in other image editing programs, but I am using iPhoto since it's most likely already on your Mac. Start by selecting the image you want to edit, and then click the Edit button. So the editing tools are located at the bottom of the window, and there are several things you can do there.

Basic image manipulation

Many times the photos you shoot might not come out as good-looking as you had hoped for. Maybe the picture is a little too dark or bright, maybe some stranger's walking through the background, or maybe there is a slight color tint to the photo. In this movie, I am going to show you some basic image editing techniques you can apply in iPhoto. Again, you will find many similar tools available in other image editing programs, but I am using iPhoto since it's most likely already on your Mac. Start by selecting the image you want to edit, and then click the Edit button. So the editing tools are located at the bottom of the window, and there are several things you can do there.

First of all, if the image is rotated on its side, just click the Rotate button, until it's right side up. The Crop tool is nice when you want to print your photo on a specific size of paper, and you want to make sure your photo is the proper dimensions. Click Crop, then select to size. For example, you might be printing to 5 x 7 or 4 x 6 piece of photo paper. That gives you a crop area with the proper dimensions, and you can resize that as necessary. I'm just going to do something like this.

When you are done, click Apply, and now my photo has been cropped. Now the Pagoda in this photo looks just a little crooked to me, so I am going to select the Straighten tool, which you can see it gives me this grid, and now I can use the slider and slightly rotate the photo until it looks about right. And I will close the Straighten tool by clicking the X button. Next we have the Enhance button, which is for anyone who doesn't know much about photo correction, but still wants a photo with good color and contrast. So I will go ahead and click that. Now Apple has never been very specific about explaining exactly what the Enhance button does, but when you click it, it appears that iPhoto examines, among other things, the picture's light levels, color balance, and saturation, and adjusts everything to give a better looking version of your picture.

Sometimes it results in no significant change in your picture, but more often than not, the results are better than what you started out with. The Enhance button works really work with photos that are too dark or that might not have enough contrast. Now one of the ways you can see what it's doing is by opening up the Adjust pane. Let me choose Edit > Undo Enhance Photo to take off that enhancement. The Adjust pane is where you will find manual controls for image adjustments. So now when I click Enhance again, watch the Enhance pane. You can see exactly what settings were applied. This is a good way to learn how to use the Adjustment pane by just observing what the automatic adjustment does.

If you do want to experiment in the Adjust pane, you can just drag sliders around to see what they do, and this is another good way to learn. There is nothing really more hands on than this. I kind of like how the Highlight slider is bringing out some of those clouds that are around the pagoda right there, so maybe I will leave that like right about there. Now if you totally mess the picture up, just click the Reset button, to set the Adjust pane back to its defaults. Let me close that. Now in addition you also have the Effects pane, in which you just click various effects to apply them to your image.

You can click each effect multiple times to increase their affect on the picture, or click the Center button Original, to revert back to the original version. And you can combine these effects as well. For instance, maybe I want to boot the color and also add a bit of an edge blur to the photo, like so. I kind of like the original more, so I am going to go back to that. iPhoto also includes a Red Eye tool, which is great for photos of people in which the Flash from the camera has caused their pupils to become red, and there is also a Retouch tool, which is very good for removing blemishes from skin or other imperfections in your photos.

For example, maybe I could use it to get rid of this street lamp sticking up out of the trees right here. I am going to first resize my brush, a little smaller, maybe a little bit bigger than that, and all I have to do here is to just click and drag over the street lamp, do it a couple more times, and the street lamp is gone. So there you have a quick run down of all the powerful editing tools found in iPhoto. I will click Done, and now my photo has been edited.

Again, you will find similar image editing tools in other photo software applications as well.

Show transcript

This video is part of

Image for Computer Literacy for the Mac
Computer Literacy for the Mac

55 video lessons · 23769 viewers

Garrick Chow
Author

 
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  1. 2m 49s
    1. Welcome
      1m 9s
    2. Using the assessment files
      1m 7s
    3. Using the exercise files
      33s
  2. 9m 51s
    1. What's a computer?
      1m 49s
    2. What's inside a computer?
      2m 46s
    3. Laptop vs. desktop computers
      1m 59s
    4. Special considerations when using a laptop
      3m 17s
  3. 20m 58s
    1. Understanding the operating system
      3m 3s
    2. Understanding files, folders, and directories
      4m 49s
    3. Understanding your home folder (your user folder)
      5m 21s
    4. Using your desktop
      3m 11s
    5. Taking out the trash (recycle bin)
      2m 21s
    6. The right click
      2m 13s
  4. 24m 8s
    1. Understanding applications
      4m 24s
    2. Opening and saving files
      4m 10s
    3. Choosing the right tool
      4m 44s
    4. How to learn any application
      3m 53s
    5. Five things that work in all applications
      6m 57s
  5. 36m 22s
    1. Understanding computer ports
      2m 59s
    2. Setting up a printer
      3m 7s
    3. Printing your documents
      4m 30s
    4. Setting up a scanner
      2m 27s
    5. Scanning a document
      6m 15s
    6. Setting up a projector or second monitor
      5m 56s
    7. Using a projector
      3m 43s
    8. Portable storage devices
      3m 53s
    9. Pairing with Bluetooth devices
      3m 32s
  6. 17m 27s
    1. Understanding networks and internet access
      2m 58s
    2. Connecting to wired network
      2m 36s
    3. Connecting to wireless networks
      4m 4s
    4. Working in a networked environment
      6m 15s
    5. Staying protected from viruses
      1m 34s
  7. 19m 31s
    1. Understanding email servers and clients
      2m 11s
    2. Setting up your email application
      4m 15s
    3. Receiving and reading email
      2m 21s
    4. Composing new email messages
      5m 52s
    5. Reply vs. Reply All
      2m 11s
    6. Dealing with spam
      2m 41s
  8. 8m 24s
    1. Understanding search engines
      1m 24s
    2. Conducting basic searches
      3m 51s
    3. Conducting advanced searches
      3m 9s
  9. 24m 21s
    1. Using word processors
      4m 22s
    2. Formatting text
      7m 7s
    3. Using spreadsheets
      3m 36s
    4. Creating a simple data table
      7m 37s
    5. Formatting a data table
      1m 39s
  10. 18m 53s
    1. Importing images from a digital camera
      4m 46s
    2. Storing and organizing digital images
      5m 11s
    3. Basic image manipulation
      4m 10s
    4. Tagging images
      2m 32s
    5. Sharing images
      2m 14s
  11. 10m 52s
    1. Common obstacles in sharing files
      1m 37s
    2. Creating PDFs for document sharing
      5m 35s
    3. Compressing files
      3m 40s
  12. 1m 3s
    1. What's next?
      1m 3s

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