核心架构请查阅 canvas-select 组件，一个用于图片标注的 javascript 库，基于 canvas，简单轻量，支持矩形、多边形、点、折线、圆形标注、网格标注。 使用离屏 canvas 绘制静态背景图片，避免频繁绘制。 避免浮点数运算，使用 Math.round()或 Math.floor()进行取整。

LIVIGNO, Italy (AP) — Ask freestyle skier Colby Stevenson if he likes big air, the most high-flying event in a sport full of ...

Following a successful debut season as part of the Outdoor Collection by Under Canvas, The Fields of Michigan today announced a ...

When you gaze up at the night sky, it’s easy to feel as though you're looking into an endless, empty canvas sprinkled with ...

In the cold days of December, as Yerevan was wrapped in winter’s breath, young artist Davit Minasyan created a true island of ...

Our planet is a canvas of fleeting miracles, a stage where the most extraordinary events unfold, often without warning, and ...

U.S. Freestyle Olympic silver medalist Jaelin Kauf and her teammates have been fitted with their Ralph Lauren uniforms for ...

The struggles and breakthroughs of Chinese American movie star Anna May Wong Anna May Wong was a pioneering actress considered to be the first major Asian American film star, despite the limits ...

Safari Technology Preview 235 版本包含了针对 CSS、Canvas、剪贴板、HTML、JavaScript 以及 MathML 等核心技术的修正与优化。 此外，该版本也对媒体处理、网络功能、转译表现、Web API、Web Inspector、WebAssembly与WebRTC等多个领域进行了细致调整，确保网页开发环境的稳定与高效。

Britain's Josh Kelly puts on a slick performance to beat Bakhram Murtazaliev and win the IBF light-middleweight title by ...

Agentic Vision combines visual reasoning with code execution to ground answers in visual evidence, delivering a 5% to 10% ...