With the popularity and development of new products constantly increasing, images are being manipulated and improved more often. There are many different programmes allowing you to do this, and I will be looking into some of the ways that you can manipulate an image. Programmes allowing you to use the following techniques are usually photo-editing software, and one of the most popular forms of this software is 'Photoshop'.
1. Image subtraction.
Sometimes, when there is an unwanted object in distracting the audience from the subject of the image, this object could be edited out. The first image shows the picture before editing, and the image below shows the picture after editing. An example of when image subtraction would be used is in motion detection (to detect object motion between two or more images). Usually, two images with the same background are subtracted leaving an image that only shows the object in motion.
Sometimes, two seperate images are merged together to look like one individual image. The image left is made up of two different images. This manipulation technique works best when the backgrounds of the images are the same/similar. This technique is used to add something into a photo to make it complete.
3. Edge enhancement.
Another technique used is edge enhancement. This can be used to make an image look less realistic, as it defines the outlines of the subject. Edge enhancement reduces an image to show only its edge details. This technique is similar to another technique called 'Hi-Pass', but edge enhancement focusses more on the edge of the subject rather than the contrast between the subject and its background. The most common is 'Laplacian' edge enhancement, which highlights the edges in an image, irrespective of their orientation.
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