The second type of human-computer interface is a free-hand-sketch based interface for image editing (e.g., moving, size-scaling, color-transforming parts of an image) is developed. The sketches drawn by the user on top of the image serve as a natural way of specifying an image part and the editing (e.g., move, deletion) operation to be performed.

Sketch-Based Object Selection in Images

To assist humans in referring to specific parts of an image, and performing desired operations on these parts, through natural-like interpersonal communication, e.g. by freely drawing sketches over the image which mean specific editorial operations such as move, expand and delete.

• K.-H. Tan and N. Ahuja, Selecting Objects with Freehand Sketches, Proc. International Conference on Computer Vision, Vancouver, Canada, July 2001, 337-344.
• K.H. Tan and N. Ahuja, A Representation for Image Structure and Its Application to Object Selection Using Freehand Sketches, IEEE Conf. On Computer Vision and Pattern Recognition (CVPR), December 11-13, 2001, Hawaii, II-677-683.