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AI図鑑

画像から動画生成

一枚の静止画を動かす

動画初級 #24
入力画像動画

本ページの本文は英語で提供されています。タイトルと導入は日本語化されています。

この能力とは何か

Takes an image, optionally with a motion description, and outputs a clip that starts from it. The first frame is usually tightly constrained to the input, and later frames extrapolate motion and camera movement from there. Unlike text-to-video it has a definite visual starting point, which raises the bar for preserving subject identity and appearance.

技術的にどう実現するか

A common approach encodes the input as a condition, either pinning the first frame of the diffusion process or injecting it as a reference, then generates the following frames; another route extends keyframes with an image model and interpolates in between. Motion magnitude and camera control are set by explicit strength parameters or trajectory conditions, while physical plausibility is learned implicitly from motion priors in the data.

代表的な製品

8

関連する組織

代表的な用途

  • Animating photos and memory clips
  • Product showcases and animated ad visuals
  • Motion pre-vis from key art and storyboards
  • Shot drafts for games and film

どう評価するか

FVD
Distribution gap between generated and real video
First-frame fidelity
Agreement between the first frame and the input
Human preference
Pairwise judgement of motion naturalness and subject retention

限界と難しさ

  • Identity drifts after the first frame, with faces and clothing changing first
  • Large camera moves break background geometry: straight lines bend and buildings misalign
  • Occlusion and parallax are often wrong, inverting front-back relations

背景にある概念