Approaches to enable a computing device, such as a phone or tablet computer, to detect when text contained in an image captured by the camera is sufficiently close to the edge of the screen and to infer whether the text is likely to be cut off by the edge of the screen such that the text contained in the image is incomplete. If the incomplete text corresponds to actionable text associated with a function that can be invoked on the computing device, the computing device may wait until the remaining portion of the actionable text is captured by the camera and made available for processing before invoking the corresponding function on the computing device.