Removing Converging Verticals from an Image

Follow these steps to remove the converging verticals from the image:

• Open the image convergingverticals.png in the SampleImages folder on the DVD.

• Set vertical guides along the outer edges of the building and a horizontal guide in the height of the eaves.

• Use the Zoom tool to zoom out a little, or pull the borders of the image window to enlarge it slightly, so that you will have a larger working surface around the image.

• Select the Perspective tool from the Toolbox. Click on the image. Drag the outer edges and the eaves of the building over the selected corner points parallel to the guides. As a result, the image may be heavily stretched horizontally. You can fix this by stretching the image vertically using the Scale tool. If necessary, use the Image > Canvas Size menu item (see section 3.13.2) to enlarge the canvas size.

• Use the Layer > Layer to Image Size menu item to resize the layer to the image size.

• Save the image with a new name in your exercise folder.

3.5 TOUCHUP WORK 5 —USING PERSPECTIVE CORRECTION TO REMOVE CONVERGING VERTICALS

The Perspective tool could also be called free transformation or free distortion tool. It does offer a way of rectifying perspective distortions on an object. However, the distortions are not interlinked (as in some tools from other programs) and the object can be distorted from its corner points over the two axes. The method should be good enough for images that don't have major distortions, as is the case with this image.

Figure 3.14

Perspective correction with the Perspective tool: The dotted line depicts the original size of the layer. In the distorted trapezoidal transformation frame, you can see the straightened façade of the building.

Figure 3.14

Perspective correction with the Perspective tool: The dotted line depicts the original size of the layer. In the distorted trapezoidal transformation frame, you can see the straightened façade of the building.

You can enlarge the layer to the image size anytime in the editing process by choosing the Layer > Layer to Image Size menu item. If you want to enlarge the size of a layer to the rectangular boundary of your pixel content, choose Layer > Autocrop Layer.

Digital Cameras For Beginners

Digital Cameras For Beginners

Although we usually tend to think of the digital camera as the best thing since sliced bread, there are both pros and cons with its use. Nothing is available on the market that does not have both a good and a bad side, but the key is to weigh the good against the bad in order to come up with the best of both worlds.

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