INTRODUCTION TO CONTENT-BASED VISUAL PROCESSING - Video Object Extraction and Representation: Theory and Applications - page 19

Figure 1.10.
challenges of the MPEG standards.

Connections between Technologies and their relationship to the key

ports a syntax that meets the demands of a wide range of video object
database searches.
This topic addresses MPEG-7 issues of representation by implement-
ing robust representation and comparison for shapes of archived video
objects and VOPs. In Chapter 3, we present an extraction technique
for shape. In Chapter 6, we present a shape query system based upon a
multiresolution data representation and its complementary comparison
algorithm.

6. SPECIFIC CHALLENGES OF THE MPEG

STANDARDS
Of the many challenges of the MPEG standards, the work in this
topic is centered around two content-based video processing problems:
Video Object Segmentation in Chapter 4 and Video Object Query by
Shape in Chapter 6, as shown in Fig. 1.10. This topic showcases both
the theoretical work, Voronoi Ordered Spaces and representation based
upon Directed Acyclic Graphs (DAG S ), and system design, a Surface
Optimization-Based System for video object segmentation and a DAG-
based system for Video Object Query by Shape.

VIDEO OBJECT SEGMENTATION FOR
MPEG-4
In Chapter 4, we tackle the central challenge of the MPEG-4 standard:
video object segmentation. As mentioned before, given a video sequence,