The method Gianna is performing is called edge enhancement.
Edge enhancement is a digital image processing technique that is used to improve the contrast and sharpness of an image. Edge enhancement is achieved by applying a high-pass filter to an image.
This filter allows for the contrast between the elements and the background to be increased, which makes the edges of the objects in the image more defined and visible. Edge enhancement is a valuable tool for fingerprint analysis, as it can help to make the details of a print more visible and easier to identify.
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