Abstract: Data associated with pixels obscured by annotations in an annotated image is stored using an annotation mask enabling annotation-aware applications to reconstruct the original image, while annotation-unaware applications can display the annotated image with optimized increase in extra data to be stored. The annotation mask, same size as the image, is initialized to a monochrome default and the color depth information for obscured pixels saved within the annotation mask. Because a majority area of the annotation mask is monochrome, it compresses well and the obscured image content can be saved in a side channel, metadata header, or a separate file. During reconstruction, changes to annotated image such as rotation, size change, and the like, may be detected and accounted for when obscured image content is carried over to the annotated image for reconstruction.

Abstract: Techniques are described for performing automatic generation of one or more tags associated with an image file. One or more ink annotations for a displayed image are received. Handwriting recognition processing of the one or more ink annotations is performed. A string is generated and the string includes one or more recognized words used to form the one or more tags associated with the image file. The handwriting recognition processing and generating the string are performed in response to receiving the ink annotations.

Abstract: Techniques are described for storing data about a displayed image. Image data corresponding to the displayed image is received. One or more ink annotations associated with the displayed image are received. The image data is stored to a first portion of the image file. A representation of the ink annotations are stored in a second portion of the image file.