FRONTview IPhone App

September 21st, 2011 § 0 comments

I have decided to start reviewing a few of the apps that are on or have been on my iPhone. The first in this series is FRONTview.

FRONTview is a great tool for correcting keystoning in a photo. Keystoning occurs when a tall object is photographed from below or from the left or right sides. This is typical of architectural images.

Large format view-cameras were used to correct keystoning by shifting and tilting the view elements, or the photographer had to elevate himself high enough to prevent it. Now we can do it digitally.

Below is an image I will use demonstrate how to correct keystoning. As you can see, the left side of the building is elevated higher and lower than the right.

Image

Open the application. There are two option for selecting an image. You can select an image that was previously created or capture one on demand. I will usually use one that I had already taken.

0image

The image will appear in the app after you have selected it. Four corners of an editing field will be used to select your altered image. The key is to find straight lines in the image. I used the windows, roofline, and sidewalk as a guide.

1image

Finally is the Aspect Ratio. As you attempt to cancel out the keystone effect, the image will either be stretched, compressed, or both.

Adjust the image, so that it closely resembles reality. Save the image and edit it for a final product.

2image

This concludes the tutorial. Download the app and play with it. The next app I will review will be ProHDR.

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