TMO: Textured Mesh Acquisition of Objects with a Mobile Device by using Differentiable Rendering

We present a new pipeline for acquiring a textured mesh in the wild with a single smartphone which offers access to images, depth maps, and valid poses. Our method first introduces an RGBD-aided structure from motion, which can yield filtered depth maps and refines camera poses guided by corresponding depth. Then, we adopt the neural implicit surface reconstruction method, which allows for high-quality mesh and develops a new training process for applying a regularization provided by classical multi-view stereo methods. Moreover, we apply a differentiable rendering to fine-tune incomplete texture maps and generate textures which are perceptually closer to the original scene. Our pipeline can be applied to any common objects in the real world without the need for either in-the-lab environments or accurate mask images. We demonstrate results of captured objects with complex shapes and validate our method numerically against existing 3D reconstruction and texture mapping methods.Comment: Accepted to CVPR23. Project Page: https://jh-choi.github.io/TMO

Deep-Learning-Based Stress Recognition with Spatial-Temporal Facial Information

In recent times, as interest in stress control has increased, many studies on stress recognition have been conducted. Several studies have been based on physiological signals, but the disadvantage of this strategy is that it requires physiological-signal-acquisition devices. Another strategy employs facial-image-based stress-recognition methods, which do not require devices, but predominantly use handcrafted features. However, such features have low discriminating power. We propose a deep-learning-based stress-recognition method using facial images to address these challenges. Given that deep-learning methods require extensive data, we constructed a large-capacity image database for stress recognition. Furthermore, we used temporal attention, which assigns a high weight to frames that are highly related to stress, as well as spatial attention, which assigns a high weight to regions that are highly related to stress. By adding a network that inputs the facial landmark information closely related to stress, we supplemented the network that receives only facial images as the input. Experimental results on our newly constructed database indicated that the proposed method outperforms contemporary deep-learning-based recognition methods

Encyclopédie des historiographies : Afriques, Amériques, Asies

Quels rapports les sociétés humaines entretiennent-elles avec leur passé et quels récits font-elles du temps révolu ? Pour ce premier volume de l’Encyclopédie des historiographies. Afriques, Amériques, Asies, 157 spécialistes représentant 88 institutions académiques en France et dans le monde explorent l’univers des productions humaines qui constituent des sources pour l’historien et déchiffrent les nombreuses modalités (« scientifiques », littéraires, artistiques, monumentales…) de l’écriture du passé. Évoquant tour à tour l’Afrique, l’Amérique latine, l’Asie, l’Océanie, les 216 notices de l’ouvrage présentent des matériaux historiques de toute nature, issus de toutes les époques, souvent méconnus, ainsi que l’histoire de leurs usages. L’entreprise collective qu’est l’Encyclopédie se veut novatrice : il s’agit de susciter une réflexion historiographique résolument non-occidentalo-centrée qui complète utilement les démarches épistémologiques traditionnelles. Nouvel outil de connaissance historique forgé à l’heure de la mondialisation, l’Encyclopédie des historiographies est aussi une véritable invitation au voyage.What are the different types of relations that non-Western societies upkeep with their past and how are narratives about the past produced by them? In this first volume of the Encyclopaedia of Historiography: Africa, America, Asia, 157 specialists from 88 international academic institutions explore the wealth of evidence that constitutes source material for historians. They also examine the immensely diverse modes or genres of narrated history: “scientific”, literary, artistic, architectural, etc. 216 entries dealing with Africa, Latin America, Oceania, and Asia, cover a large variety of sources, including many which are unfamiliar to the Western or non-Western reader, along with the history of how they have been exploited. By bringing together for the first time such an abundance of material the reader is offered the possibility of exploring continents and building meaningful connections across space and time. In addition to being a new tool for historical enquiry in an era of globalization, this encyclopaedia is also an invitation to travel the world