Patent ID: 9324164
Filing Date: 2016-04-26
CPC Classification: G06T,H04N

Claim Text:
1. An image encoding apparatus for encoding a High Dynamic Range image, comprising: an input unit configured to input the High Dynamic Range image of an encoding target; a generating unit configured to generate, from the input High Dynamic Range image, a Low Dynamic Range image and difference information representing a difference between the Low Dynamic Range image and the High Dynamic Range image; an encoding unit configured to encode the Low Dynamic Range image generated by the generating unit; a calculating unit configured to calculate, as Low Dynamic Range meta-data, information formed from data representing a feature of the Low Dynamic Range image; and a file generating unit configured to generate a High Dynamic Range encoded file by storing encoded data of the Low Dynamic Range image generated by the encoding unit in a main encoded data storage region of a file structure for the Low Dynamic Range image and storing the difference information and the Low Dynamic Range meta-data in a marker defined as a non-reference region for a Low Dynamic Range image decoding apparatus in the file structure; a memory storing a program; and a processor configured to function as at least one of the units by executing the program stored in the memory, wherein the calculating unit includes a reducing unit configured to generate one representative pixel from n×m pixels in the Low Dynamic Range image, thereby generating a Low Dynamic Range reduced image from the representative pixel, wherein n and m are each equal to or greater than 1, wherein the encoding unit encodes the Low Dynamic Range reduced image as well, and the file generating unit stores encoded data of the Low Dynamic Range reduced image in the marker as the Low Dynamic Range meta-data and generates the High Dynamic Range encoded file.