The key to this synthesis is the selection of the weights (w 1 . A new sketch patch is created using a linear combination of the selected candidate sketch patches. The selection is based on the Euclidean distance of the photo patches. For each of these patches, several candidate photo and sketch patch pairs are selected from the example dataset. The input photo will first be divided into overlapping patches. To synthesize a face sketch, we use a database of sketch/photo images as examples (see Fig. It is therefore challenging to formulate rules for the automatic generation of a sketch and it might not be feasible to find a function that directly transforms a face photo to a face sketch. Artists often exaggerate distinctive facial features in a sketch and add shading to various facial features. 1: Examples of face photos (left) and their corresponding sketches (right). Face sketch/photo synthesize can be used for face recognition, which has applications in law enforcement.įig. In particular, we are interested to automatically generate one from the other. In this project, we study the relationship between a photo and a sketch of a human face (see Fig. An experienced visual artist is able to draw a sketch rapidly however, sketching a complex object or a detailed human face can be difficult and time-consuming for the untrained. A sketch is a freehand drawing that is often used to graphically demonstrate an image, idea or principle.
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