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Interchange-able JPEG Image Capture from MJPEG

IP.com Disclosure Number: IPCOM000211184D
Original Publication Date: 2011-Sep-26
Included in the Prior Art Database: 2011-Sep-26

Publishing Venue

Microsoft

Related People

Inventors:
Yongjun Wu Radhika Jandhyala Chengjie Tu Naveen Thumpudi

Abstract

Scan the markers in a MJPEG frame, and detect whether the MJPEG frame is an interchange-able JPEG image according to JPEG standard. If MJPEG frame is conformant to interchange-able JPEG format, save MJPEG frame directly as inter-exchangeable JPEG. If not, add the missing markers, such as Define-Huffman-Tables marker (DHT) with known default Huffman table, define-quantization-tables marker (DQT) with known default quantization table, to achieve interchange-able, and conformant according to Annex B of JPEG spec, without MJPEG decoding and JPEG encoding, and quality loss.