A polar coordinate perspective on motion search in video coding

Fast track article for IS&T International Symposium on Electronic Imaging 2021: Image Processing: Algorithms and Systems XIX proceedings.

Visual Browse and Exploration in Motion Capture Data with Phylogenetic Tree of Context-Aware Poses

Visual browse and exploration in motion capture data take resource acquisition as a human–computer interaction problem, and it is an essential approach for target motion search. This paper presents a progressive schema which starts from pose browse, then locates the interesting region and then switches to online relevant motion exploration. It mainly addresses three core issues. First, to alleviate the contradiction between the limited visual space and ever-increasing size of real-world database, it applies affinity propagation to numerical similarity measure of pose to perform data abstraction and obtains representative poses of clusters. Second, to construct a meaningful neighborhood for user browsing, it further merges logical similarity measures of pose with the weight quartets and casts the isolated representative poses into a structure of phylogenetic tree. Third, to support online motion exploration including motion ranking and clustering, a biLSTM-based auto-encoder is proposed to encode the high-dimensional pose context into compact latent space. Experimental results on CMU’s motion capture data verify the effectiveness of the proposed method.

BRAIN CELLS REACTION IN A RESPONSE TO ANTIGEN INJECTION IN ANIMALS EXPOSED TO ACUTE PRENATAL STRESS

Prenatal stress is one of the major cause of long-term disorders in behavioral and neuroimmunne processes. Emotional prenatal maternal stress (PRMS) performsin an offspring tendency to anxiety, depressive-like behavior and weakening memorizing skills. The study field was to determinate preproorexin gene expression of the maturity rats held in prenatal stress on the 19th day. The expression level was measured in two hours after intravenous LPS injection. qPCR shoved significant reduction in preproorexin gene expression in hypothalamus cells. This result corresponds with behavioral tests where animals exposed to stress during the late term of in utero development demonstrate less motion search activity which allovers to suspect a connection between prenatal stress and incidences of psycho-neuro-immunne relationships disorders.

Interactive Dance Guidance Using Example Motions

Background/Objectives: Human movements in dance are difficult to train without taking an actual class. In this paper, an interactive system of dance guidance is proposed to teach dance motions using examples.Methods/Statistical analysis: In the proposed system, a set of example motions are captured from experts through a method of marker-free motion capture, which consists of multiple Kinect cameras. The captured motions are calibrated and optimally reconstructed into a motion database. For the efficient exchange of motion data between a student and an instructor, a posture-based motion search and multi-mode views are provided for online lessons.Findings: To capture accurate example motions, the proposed system solves the joint occlusion problem by using multiple Kinect cameras. An iterative closest point (ICP) method is used to unify the multiple camera data into the same coordinate system, which generates an output motion in real time. Comparing to a commercial system, our system can capture various dance motions over an average of 85% accuracy, as shown in the experimental results. Using the touch screen devices, a student can browse a desired motion from the database to start a dance practice and send own motion to an instructor for feedback. By conducting online dance lessons such as ballet, K-pop, and traditional Korean, our experimental results show that the participating students can train their dance skills over a given period.Improvements/Applications: Our system is applicable to any student who wants to learn dance motions without taking an actual class andto receive online feedback from a distant instructor.

Taru Tari Tara

“Taru Tari Tara” adalah judul dari karya tari yang menunjuk pada konsep dasar yang diwujudkan ke dalam sebuah koreografi kelompok. Taru dalam bahasa Bali memiliki arti kayu, kemudian Tari berarti tari atau apabila dilihat dari substansi dasarnya adalah gerak atau perilaku, selanjutnya Tara yang berasal dari kata ketara dalam bahasa Bali berarti terlihat. “Taru Tari Tara” berarti bagaimana gerak dan perilaku (Tari) yang terlihat (Tara) dalam mengolah sebuah kayu (Taru). Ide karya tari ini muncul dari ketertarikan penata terhadap gerak dan perilaku seorang maestro seniman pembuat topeng di Bali bernama I Wayan Tangguh, yang merupakan kakek penata sendiri.Karya tari ini secara struktural dibagi ke dalam lima adegan (introduksi, adegan satu, dua, tiga, ending) dengan lebih berfokus pada aktivitas I Wayan Tangguh sebagai seorang petani, pembuat topeng, dan pemangku. Gagasan tersebut muncul berdasarkan pengamatan yang dilakukan secara visual kemudian berkembang menjadi sebuah ide. Hasil dari pengamatan yang dilakukan terhadap proses pembuatan topeng dijadikan sebagai bahan acuan untuk melangkah pada tahap ekpslorasi, meliputi pencarian gerak, pembuatan properti, setting, kostum tari, dan musik tari.Karya tari yang disajikan dalam bentuk koreografi kelompok ini melibatkan enam orang penari laki-laki, menggunakan properti tari berupa topeng Bali, dan dipentaskan di proscenium stage. Gerak tari yang digunakan berdasar pada hasil eksplorasi gerak membuat topeng seperti menyerut kayu, memukul kayu, memegang topeng, dan menjepit topeng menggunakan kaki, serta divariasikembangkan dengan sikap serta motif gerak tari tradisi Bali seperti agem, malpal, ngaed, dan nayog. "Taru Tari Tara" is the title of a created dance piece. The title is pointing to the basic concepts that are embodied into a choreography group. Taru in Balinese language means wood, then Tari or dance means when seen from the substance or behavior is essentially the motion, then Tara is derived from the word in the language of Bali means striking looks. “Taru Tari Tara” means how movement and behavior (Tari) are visible (Tara) in processing a timber (Taru). The idea of this dance work arises from interest from the choreographer against the motion and behavior of a master artist mask maker in Bali named I Wayan Tangguh, choreographer's own grandfather.This dance piece is structurally divided into five scenes (introduction, scene one, two, three, ending) with a focus on the activities of I Wayan Tangguh as a farmer, mask makers, and stakeholders. The idea arose based on observations made visually and then developed into an idea. The results of observations made on the process of making a mask used as a reference material for stepping on stage ekploration, includes motion search, the manufacture of the property, setting, costume dance, and dance music.Dance works presented in the form of the group choreography involving six male dancers, using the property Balinese dance masks, and staged in a proscenium stage. Dance movement that is used, based on the results of exploration motion that makes the masks like shaving wood, hitting the wood work, holding the mask, and clamping the mask using the feet, as well as attitudes and motives varied and develop with traditional Balinese dance like agem, malpal, ngaed, and nayog.