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Straightening a crooked image

From: Photoshop CC One-on-One: Fundamentals

Video: Straightening a crooked image

In this movie, I'll show you a couple of tools that allow you to automatically straighten an image. There's the relatively new Straighten tool. And then there's the older, but I believe to be better, Ruler tool. And I'll show you how they both work so you can make your own choice. We have before us the, classic tourist pushes a Pisa photograph that remains fresh as ever. Regardless of how many billions of people have done it. But the photographer seems to have had trouble choosing which to make straight, the horizon or the tower, because neither are.

Straightening a crooked image

In this movie, I'll show you a couple of tools that allow you to automatically straighten an image. There's the relatively new Straighten tool. And then there's the older, but I believe to be better, Ruler tool. And I'll show you how they both work so you can make your own choice. We have before us the, classic tourist pushes a Pisa photograph that remains fresh as ever. Regardless of how many billions of people have done it. But the photographer seems to have had trouble choosing which to make straight, the horizon or the tower, because neither are.

And what you typically see folks do is try to make Pisa look like it's tipping over more than it is by making the ground go this way. But actually, the tower should be tippier than all this. So we need to make the horizon line straight. Two ways of approaching it. One is to grab yourself the Crop tool. And then notice up here in a Tool bar, we've got the Straighten tool that's available to us. And you can get to it either by clicking on the little icon or by clicking on the word straighten. Either works.

And then, what you want to do is drag along the horizon line. You could also drag along a vertical element if you prefer, but the horizon is usually the safest bet. The problem is you really just get kind of one shot at this because after you drag the line and release, then Photoshop goes ahead and straightens the image and switches you away from the Straighten tool. So, if you find out you haven't done it exactly right, then you need to reselect the Straighten tool and try again. But to its credit, the Crop tool does go ahead and crop away all of the wedges.

Notice that we've rotated the image. And the crop boundary's now as big as it can be, without revealing any areas that would otherwise be transparent. Notice that between movies, I went ahead and reselected Delete Cropped pixels. So if I didn't want to delete this pixels that are outside the boundary, I would have to go ahead and turn that checkbox off. And you can turn it on and off while you're in the middle of performing the operation. So, that's good news. But I'm going to leave it on because I want you to see something here. This is very interesting.

I'll go ahead and press the Enter key or the Return key on the Mac. And sure enough, the Crop tool, per my instructions, has gone ahead and applied a destructive modification because we are still left with the background image here inside the Layers panel. Anyway, I'll go ahead and press Control+Z or Command+Z on a Mac to undo that change. Here's the way I prefer to work. You go to the Eyedropper tool, click and hold, and then you choose the Ruler tool, which has been around inside Photoshop forever. And then, you drag along the horizon line, just as you do with the Straighten tool.

But, the advantage is that nothing happens immediately. So, if you're not sure you've gotten it exactly right, why then you can modify this line as much as you want. So I'm going to go ahead and zoom in here and try to get this ruler line exactly right. And this appears to be more or less it, let's say. And then, once you think that you've got a line that matches the horizon, you go up to the options bar and click on this button Straighten Layer. And that not only goes ahead and straightens the image, it generates an independent layer automatically.

So, there's no chance of this tool being any more destructive than it has to be. Obviously, it has to rewrite the pixels because we're rotating the image. But otherwise, we have not cropped the image at all. And in fact, Photoshop just went ahead and rotated the image inside of its original boundary, so that the canvas size is the same as it ever was. Now what you do is, go ahead and switch back to the Crop tool and you can modify the crop boundary to taste. I'm going to go ahead and take it down a little bit like so, to right about there.

It's sort of snapping on me a little bit. And then, I'll go ahead and drag down to reveal the model's foot, to about there, let's say. Now, if you don't want this snapping to occur, which I don't, then you can go up to the View menu and turn off the Snap command. And then I'll go ahead and drag down and notice now I have a little more control. I'm not snapping to the canvas anymore, so I have a little more room. Around the model's foot. And I can drag upward a little bit as well if I like in order to bring back some more of that sky.

And then I'll press the Enter key, or the Return key on the Mac, in order to apply that change. Now you may look at this and say well, Deke, you have some wedges. Around here, everybody's going to notice that portions of the image are missing. And, that's true of course, the way things are now. But I'm going to show you how to rebuild these missing details, so that the image looks exactly right, in the very next movie.

Show transcript

This video is part of

Image for Photoshop CC One-on-One: Fundamentals
Photoshop CC One-on-One: Fundamentals

103 video lessons · 28787 viewers

Deke McClelland
Author

 
Expand all | Collapse all
  1. 38m 23s
    1. Welcome to One-on-One
      1m 51s
    2. Opening from the Windows desktop on Windows 8 (CC 2014)
      6m 16s
    3. Opening from the Windows desktop on Windows 7 or earlier (CC)
      5m 48s
    4. Opening from the Macintosh Finder
      7m 10s
    5. Opening from Photoshop or Bridge
      3m 52s
    6. Opening an image from Mini Bridge (CC)
      2m 39s
    7. Opening through Camera Raw
      5m 11s
    8. Closing one image and closing all
      5m 36s
  2. 52m 47s
    1. Navigating your image
      40s
    2. The dark vs. the light interface
      6m 2s
    3. Navigating tabs and windows
      4m 32s
    4. Panels and workspaces
      6m 20s
    5. Zooming incrementally
      6m 22s
    6. Zooming continuously
      2m 43s
    7. Entering a custom zoom value
      2m 25s
    8. Scrolling and panning images
      2m 31s
    9. Rotating and resetting the view
      2m 11s
    10. Cycling between screen modes
      3m 10s
    11. Using the Navigator panel
      3m 38s
    12. Using Retina and HiDPI displays
      4m 3s
    13. Adjusting a few screen preferences
      8m 10s
  3. 1h 2m
    1. Digital imaging fundamentals
      1m 45s
    2. Image size and resolution
      6m 34s
    3. The Image Size command
      6m 9s
    4. Common resolution standards
      4m 7s
    5. Upsampling vs. real pixels
      7m 59s
    6. Changing the print size
      8m 15s
    7. Downsampling for print
      5m 14s
    8. Downsampling for email
      6m 22s
    9. The interpolation settings
      6m 40s
    10. Downsampling advice
      5m 5s
    11. Upsampling advice
      4m 15s
  4. 53m 20s
    1. The layered composition
      1m 40s
    2. Introducing the Layers panel
      4m 12s
    3. Adding, scaling, and aligning layers
      5m 27s
    4. Dragging and dropping layers
      4m 36s
    5. Stack, reveal, and rename
      3m 1s
    6. Opacity, history, and blend mode
      6m 5s
    7. Duplicating a selected portion of a layer
      5m 32s
    8. Applying a clipping mask
      3m 58s
    9. Blending inside a clipping mask
      4m 10s
    10. Finishing off your artwork
      3m 13s
    11. Creating a new layer and background
      4m 24s
    12. Layering tips and tricks
      7m 2s
  5. 26m 13s
    1. The art of the save
      54s
    2. Four things to know about saving
      5m 59s
    3. Saving layers to PSD
      6m 34s
    4. Saving print images to TIFF
      4m 48s
    5. Saving an interactive image to PNG
      3m 40s
    6. Saving a flat photo to JPEG
      4m 18s
  6. 32m 16s
    1. Honing in on your image
      1m 43s
    2. The new and improved Crop tool
      4m 35s
    3. Editing your last crop
      6m 29s
    4. Cropping to a specific ratio or size
      5m 57s
    5. Straightening a crooked image
      4m 44s
    6. Filling in missing details
      6m 44s
    7. Using the Perspective Crop tool
      2m 4s
  7. 44m 51s
    1. First, there is brightness
      2m 12s
    2. How luminance works
      4m 18s
    3. The three Auto commands
      3m 27s
    4. Automatic brightness and contrast
      6m 5s
    5. The Brightness/Contrast command
      2m 47s
    6. The dynamic adjustment layer
      4m 4s
    7. Editing adjustment layers
      3m 52s
    8. Isolating an adjustment with a layer mask
      3m 31s
    9. Introducing the histogram
      4m 58s
    10. Measuring an adjustment
      3m 34s
    11. Using the Shadows/Highlights command
      6m 3s
  8. 44m 33s
    1. And second, there is color
      1m 31s
    2. Identifying a color cast
      3m 34s
    3. Correcting a color cast automatically
      3m 57s
    4. Changing the color balance
      6m 10s
    5. Compensating with Photo Filter
      3m 11s
    6. Adjusting color intensity with Vibrance
      3m 29s
    7. Correcting color casts in Camera Raw
      5m 46s
    8. The Hue/Saturation command
      5m 26s
    9. Summoning colors where none exist
      4m 8s
    10. Making more color with Vibrance
      4m 27s
    11. Making a quick-and-dirty sepia tone
      2m 54s
  9. 55m 46s
    1. Making selective modifications
      1m 10s
    2. The geometric Marquee tools
      6m 1s
    3. Aligning one image element to another
      4m 59s
    4. The freeform Lasso tools
      3m 59s
    5. The Polygonal Lasso tool and Quick Mask
      5m 19s
    6. Cropping one selection inside another
      6m 15s
    7. Creating rays of light
      4m 44s
    8. Quick Selection and Similar
      4m 11s
    9. Making it better with Refine Edge
      4m 56s
    10. Integrating image elements
      2m 39s
    11. Magic Wand and Grow
      5m 17s
    12. Refine, integrate, and complete
      6m 16s
  10. 53m 48s
    1. Your best face forward
      1m 0s
    2. Content-Aware Fill
      6m 11s
    3. Using the Spot Healing Brush
      5m 36s
    4. The more capable "standard" Healing Brush
      5m 55s
    5. Meet the Clone Source panel
      3m 53s
    6. Caps Lock and Fade
      4m 57s
    7. The Dodge and Burn tools
      5m 1s
    8. Adjusting color with the Brush tool
      6m 35s
    9. Smoothing skin textures
      5m 57s
    10. Brightening teeth
      4m 0s
    11. Intensifying eyes
      4m 43s
  11. 49s
    1. Until next time
      49s

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