Musimathics: The Mathematical Foundations of Music, Volume 1

Buku ini membahas tentang dasar-dasar matematika untuk musik

MISAME

Recording of D. Gareth Loy's Nekyia. The title refers to the eleventh chapter of Homer's The Odyssey in which Odysseus and his men have just escaped the enchantment of Circle's Island and are about to experience the demonic confrontation of the souls from Hades, in order to consult with tierces for how to return to Ithaca. The music, though not narrative, uses images of enchantment and demonic confrontation to explore the existential position of the hero to evoke the same moods in the audience

Detecting bilateral symmetry in perspective

A method is presented for efficiently detecting bilateral symmetry on planar surfaces under perspective projection. The method is able to detect local or global symmetries, locate symmetric surfaces in complex backgrounds, and detect multiple incidences of symmetry. Symmetry is simultaneously evaluated across all locations, scales, orientations and under perspective skew. Feature descriptors robust to local affine distortion are used to match pairs of symmetric features. Feature quadruplets are then formed from these symmetric feature pairs. Each quadruplet hypothesises a locally planar 3D symmetry that can be extracted under perspective distortion. The method is posed independently of a specific feature detector or descriptor. Results are presented demonstrating the efficacy of the method for detecting bilateral symmetry under perspective distortion. Our unoptimised Matlab implementation, running on a standard PC, requires of the order of 20 seconds to process images with 1,000 feature points

Real-Time Regular Polygonal Sign Detection

In this paper, we present a new adaptation of the regular polygon detection algorithm for real-time road sign detection for autonomous vehicles. The method is robust to partial occlusion and fading, and insensitive to lighting conditions. We experimentally demonstrate its application to the detection of various signs, particularly evaluating it on a sequence of roundabout signs taken from the ANU/NICTA vehicle. The algorithm runs faster than 20 frames per second on a standard PC, detecting signs of the size that appears in road scenes, as observed from a camera mounted on the rear-vision mirror. The algorithm uses the symmetric nature of regular polygonal shapes, we also use the constrained appearance of such shapes in the road scene to the car in order to facilitate their fast, robust detection