Patent ID: 8009337
Filing Date: 2011-08-30
Classification: H04N

Abstract:
1. An image display apparatus having an electronic zoom function for expanding and displaying a part of an entire captured image, the image display apparatus comprising: imaging means for changing a start position of reading the image, the start position is a first position where reading of a screen of the image is performed; in order for at least a part of a predetermined range of data to be expanded and displayed based on a center of the entire image to be written at a time of reading the image from a memory, writing means for extracting the predetermined range of the data out of the image read by the imaging means and input as a capturing result, and for writing the extracted image in the memory; reading means for starting to read the image written in the memory by the writing means at the time of the reading of the image, for converting the predetermined range of the image read from the memory into an image of a predetermined resolution, and for outputting the image; when the range of the image read by the reading means is wider than the predetermined range, control means for controlling the start position of reading by the imaging means so as to narrow the range of the image to be read; and exposure-time control means for controlling maximum exposure time before and after a transition of the start position of reading the image by the imaging means.