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Straightening

From: Photoshop CS4 Essential Training

Video: Straightening

If a photo is crooked, it can be disconcerting to you and to your viewers. Sometimes it's just hard to hold your camera straight or if you are scanning a printed photo on a flatbed scanner, it's particularly hard to get a straight photo. But don't worry. You can straighten things up in Photoshop as I'll show you here. First, I'd like to use the Ruler tool to straighten an image. The Rule tool is located in the toolbox behind the Eyedropper tool. I'm going to select it here, and then I'll come into my image and I'm going to find something that I think should be straight.

Straightening

If a photo is crooked, it can be disconcerting to you and to your viewers. Sometimes it's just hard to hold your camera straight or if you are scanning a printed photo on a flatbed scanner, it's particularly hard to get a straight photo. But don't worry. You can straighten things up in Photoshop as I'll show you here. First, I'd like to use the Ruler tool to straighten an image. The Rule tool is located in the toolbox behind the Eyedropper tool. I'm going to select it here, and then I'll come into my image and I'm going to find something that I think should be straight.

It's pretty clear in this case that that should be the horizon here. So I'm going to click on the horizon. Holding my mouse down, I'm just going to drag this Rule tool over, and release. It doesn't matter exactly where you release either. Then I'm going to go to the Image menu at the top of the screen and choose Image Rotation > Arbitrary. When I do that, Photoshop tells me exactly what angle it will have to rotate the image to in order to make the horizon straight. So I'll say OK. The horizon is now straight, but of course the photograph isn't.

So that's the tradeoff. At this point I would use my Crop tool here in the toolbox, come in and drag out a crop boundary, and I am going to fit the corners of the crop boundary as far as they will go inside of the image here without getting any of the white around it. That's probably as much as I can get, and so I am going to go up and click the check mark in the Options bar to accept that crop and now I do have a straight horizon in my photo. Sometimes when I'm scanning, I'm lazy and I don't want to scan one photograph at a time, so I'll scan several and I'll get a result like this one.

The second image I have open here is scan.psd, where the photos are just a little crooked on the scanner bed. I will show you my Layers panel here, so that you can see that all three of these photos are on one individual layer, so there's no easy way to cut them out one by one. Instead, what I can do is just go to the File menu at the top of the screen, go down to Automate, and go over to this command, Crop and Straighten Photos. It's one you might not find on your own. So try to remember it.

It really comes in handy for scanning. I release and then I wait while Photoshop does all the work. It's now made three separate images for me. Let me show you all three. This separate of the pool, a separate one of the sunflowers, and a separate one of this individual sunflower. Now sometimes it misses and doesn't get the edge exactly right. As here you can see, if I zoom in, that there's a little bit of white at the edge. So in that case, I'll just get my Crop tool and I'll crop that away and if you have trouble getting your Crop tool to behave when it gets near the edge of a photo, that's because under the View menu, this commands Snap is activated by default.

So I'm going to toggle Snap off, and now I'll be able to get these crop boundaries and drag them just where I want them without them trying to snap to the edge of the photo, and then I will press the check mark to commit that crop. So that's a look at two of the straightening features in Photoshop. Use the Ruler tool on a single photo to straighten things up and if you scanned multiple images together on one layer of the file, use the File > Automate > Crop and Straighten command to separate, straighten, and crop them all in one go.

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This video is part of

Image for Photoshop CS4 Essential Training
Photoshop CS4 Essential Training

103 video lessons · 67411 viewers

Jan Kabili
Author

 
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  1. 2m 31s
    1. Welcome
      1m 27s
    2. Using the example files
      1m 4s
  2. 25m 14s
    1. Touring the interface
      4m 25s
    2. Working with tabbed documents
      5m 15s
    3. Using tools efficiently
      3m 51s
    4. Arranging panels
      3m 53s
    5. Customizing keyboard shortcuts
      2m 50s
    6. Saving a custom workspace
      3m 0s
    7. Changing screen modes
      2m 0s
  3. 19m 3s
    1. Touring the Bridge interface
      6m 31s
    2. Opening images from Bridge
      1m 20s
    3. Reviewing images
      4m 42s
    4. Finding images
      6m 30s
  4. 44m 53s
    1. Setting preferences
      4m 23s
    2. Choosing color settings
      8m 11s
    3. Zooming and panning
      5m 27s
    4. Resizing and image resolution
      3m 17s
    5. Adding to the canvas
      2m 2s
    6. Rotating the canvas
      1m 44s
    7. Choosing color
      4m 49s
    8. Sizing a brush tip
      3m 4s
    9. Undoing and the History panel
      5m 0s
    10. Saving and file formats
      3m 29s
    11. Creating a file from scratch
      3m 27s
  5. 37m 58s
    1. Making geometric selections
      6m 14s
    2. Modifying selections
      4m 43s
    3. Combining selections
      3m 16s
    4. Using the Quick Selection tool
      5m 34s
    5. Refining selection edges
      4m 12s
    6. Using Quick Mask mode
      2m 18s
    7. Selecting with the improved Color Range command
      4m 32s
    8. Selecting with the Magnetic Lasso tool
      2m 28s
    9. Using the Background Eraser tool
      3m 7s
    10. Saving selections
      1m 34s
  6. 39m 56s
    1. Understanding layers
      5m 43s
    2. Creating layers
      5m 12s
    3. Working in the Layers panel
      2m 19s
    4. Locking layers
      4m 17s
    5. Working with multiple layers
      4m 6s
    6. Merging and flattening layers
      3m 55s
    7. Adding a shape layer
      4m 43s
    8. Basic layer masking
      4m 23s
    9. Using layer blend modes and opacity
      5m 18s
  7. 23m 19s
    1. Cropping
      3m 26s
    2. Straightening
      3m 17s
    3. Transforming
      4m 42s
    4. Working with Smart Objects
      6m 48s
    5. Using Content-Aware Scaling
      5m 6s
  8. 1h 10m
    1. Reading histograms
      4m 21s
    2. Using adjustment layers and the Adjustment panel
      6m 4s
    3. Adjusting tones with Levels
      7m 49s
    4. Limiting adjustments with layer masks
      5m 40s
    5. Using masks in the new Masks panel
      6m 9s
    6. Limiting adjustments by clipping
      3m 6s
    7. Adjusting with Shadow/Highlight
      5m 7s
    8. Adjusting with Curves
      7m 37s
    9. Adjusting with Hue/Saturation
      3m 42s
    10. Adjusting with Vibrance
      2m 16s
    11. Removing a color cast
      4m 26s
    12. Using the Black & White adjustment layer
      2m 39s
    13. Using the Dodge Burn and Sponge tools
      4m 11s
    14. Reducing noise
      2m 39s
    15. Sharpening
      4m 42s
  9. 38m 0s
    1. Using the Spot Healing Brush tool
      5m 17s
    2. Using the Healing Brush tool
      5m 51s
    3. Using the Patch tool
      4m 52s
    4. Using the Clone Stamp tool
      4m 8s
    5. Enhancing eyes
      9m 29s
    6. Changing facial structure
      5m 0s
    7. Softening skin
      3m 23s
  10. 44m 38s
    1. What's a raw image?
      4m 25s
    2. Touring the Camera Raw interface
      7m 35s
    3. Working in the Basic panel
      7m 54s
    4. Working in the Tone Curve panel
      2m 21s
    5. Working in the HSL/Grayscale and Split Toning panels
      3m 46s
    6. Looking at the other Camera Raw panels
      3m 45s
    7. Using the Adjustment Brush tool
      4m 2s
    8. Using the Graduated Filter tool
      3m 56s
    9. Working with multiple files
      6m 54s
  11. 21m 6s
    1. Using the Brushes panel
      8m 30s
    2. Filling with color
      3m 49s
    3. Replacing color
      4m 14s
    4. Using gradients
      4m 33s
  12. 16m 55s
    1. Working with point type
      9m 59s
    2. Working with paragraph type
      3m 17s
    3. Warping text
      3m 39s
  13. 25m 23s
    1. Adding a layer style
      4m 6s
    2. Customizing a layer style
      3m 35s
    3. Copying a layer style
      3m 5s
    4. Creating a new style
      3m 32s
    5. Using Smart Filters
      5m 22s
    6. Working in the Filter Gallery
      5m 43s
  14. 13m 14s
    1. Auto-blending focus
      4m 47s
    2. Creating Photomerge panoramas
      4m 2s
    3. Combining group photos
      4m 25s
  15. 23m 27s
    1. Creating an action
      7m 16s
    2. Batch processing with an action
      6m 36s
    3. Using the Image Processor
      9m 35s
  16. 29m 20s
    1. Printing
      11m 32s
    2. Making a contact sheet from Bridge
      6m 12s
    3. Creating a web gallery from Bridge
      7m 17s
    4. Preparing photos for the web
      4m 19s
  17. 30s
    1. Goodbye
      30s

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