Revisiting Intrinsic Curves for Efficient Dense Stereo Matching

Abstract

ABSTRACT:Dense stereo matching is one of the fundamental and active areas of photogrammetry. The increasing image resolution of digital cameras as well as the growing interest in unconventional imaging, e.g. unmanned aerial imagery, has exposed stereo image pairs to serious occlusion, noise and matching ambiguity. This has also resulted in an increase in the range of disparity values that should be considered for matching. Therefore, conventional methods of dense matching need to be revised to achieve higher levels of efficiency and accuracy. In this paper, we present an algorithm that uses the concepts of intrinsic curves to propose sparse disparity hypotheses for each pixel. Then, the hypotheses are propagated to adjoining pixels by label-set enlargement based on the proximity in the space of intrinsic curves. The same concepts are applied to model occlusions explicitly via a regularization term in the energy function. Finally, a global optimization stage is performed using belief-propagation to assign one of the disparity hypotheses to each pixel. By searching only through a small fraction of the whole disparity search space and handling occlusions and ambiguities, the proposed framework could achieve high levels of accuracy and efficiency.

Local stereo matching algorithm using modified dynamic cost computation

“…Therefore, the architecture and system include very complicated and challenging images for framework evaluation. Figure 3 shows the comparison disparity map matching result on the Middlebury images 'Motorcycle', 'Playtable' and 'Vintage' images, Figures 3 (a [26], intrinsic curve stereo matching (ICSG) [27], gradient matching with iterative guided filter (ISM) [28], adaptive support weight with guided filter (ADSR_GIF) [29] and modified network coordination centre (R-NCC) [30]. The object scenes located at the depth are designated step by step, increasing the disparity values based on the final value from closer to farther according to colours assignment.…”