Background removal tool for a presentation application

摘要

A presentation application for masking portions of an object, such as the background of an image, is provided. The presentation application may provide a background removal tool that allows a user to define an initial point in the background of the object. The presentation application may establish an initial background color based on the initial point, and may compute and automatically adjust a color tolerance of the background color based on the distance that a user-controlled cursor is from the initial point. Using a seed-fill algorithm, the presentation application can select a contiguous portion of the object for masking that includes the initial point and surrounding pixels that are within the background color tolerance. To smoothen the edges of the contiguous portion, the presentation application can convert the portion to a vector graphic before masking the object.

主权项

1. A method of masking a portion of an object using a presentation application implemented on an electronic device, the method comprising:
identifying an initial color of an initial point on the object received from a user; computing a color tolerance for the initial color that is derived from a distance between the initial point and a second location on the object defined by the user; selecting for masking the portion of the object that includes the initial point based on the initial color and the color tolerance; generating a new mask based on the selected portion of the object; generating a masked object by applying a plurality of masks, including the new mask, to the object while leaving the object unchanged; storing the masked object by storing the unchanged object and a plurality of masks; and presenting the masked object on a display of the electronic device.