key out

简明释义

切断

英英释义

例句

1.During the film production, they needed to key out certain elements for special effects.

在电影制作过程中，他们需要抠出某些元素以进行特效处理。

2.The video editor had to key out the green screen to replace it with a different scene.

视频编辑必须抠出绿幕，以用不同的场景替换它。

3.The photographer used software to key out the unwanted objects in the photo.

摄影师使用软件来抠出照片中不需要的物体。

4.To create a professional-looking presentation, you should key out any distractions in your slides.

为了创建一个专业的演示文稿，你应该抠出幻灯片中的任何干扰因素。

5.In graphic design, you can key out the background to isolate the subject.

在图形设计中，你可以抠出背景以孤立主题。

作文

In the world of technology and digital media, the term key out refers to a specific process used in video editing and production. This technique is primarily employed to remove a particular color from a video frame, allowing for the insertion of different backgrounds or effects. The most common application of key out is seen in green screen technology, where subjects are filmed against a bright green backdrop. The purpose of this is to make it easier to key out the green color during the editing process, effectively isolating the subject and enabling the editor to replace the background with any desired scene.For instance, consider a scenario where a filmmaker wants to create a dramatic scene set on a distant planet. By filming the actors in front of a green screen, they can easily key out the green and insert stunning visuals of an alien landscape behind them. This not only enhances the visual appeal of the film but also allows for greater creative freedom, as the limitations of physical sets are eliminated.However, achieving a clean key out requires careful attention to lighting and camera settings. If the green screen is poorly lit or if the subject casts shadows on it, the resulting footage may have unwanted artifacts, making it difficult to isolate the subject. Therefore, cinematographers must strive for even lighting and ensure that the subject is positioned at an appropriate distance from the green screen to avoid any issues during the key out process.Moreover, the concept of key out extends beyond just green screens. It can also apply to other colors, depending on the needs of the project. For example, some filmmakers may choose to use blue screens instead of green, especially when filming scenes that involve green objects or costumes. The ability to key out various colors allows for flexibility in production and opens up new possibilities for storytelling.In addition to film and television, the technique of key out is also prevalent in live broadcasting. News anchors often stand in front of a green screen while presenting weather updates or special reports. By using the key out method, broadcasters can display relevant graphics or images behind the anchor, providing viewers with a more engaging experience.As technology continues to evolve, the tools available for key out processes have become more sophisticated. Software programs like Adobe After Effects and Final Cut Pro offer advanced features that allow editors to refine their key out results, including color correction, edge feathering, and spill suppression. These enhancements ensure that the final product appears seamless and professional.In conclusion, understanding the process of key out is essential for anyone involved in video production or editing. This technique not only facilitates creative storytelling but also enhances the overall quality of visual media. As technology advances, mastering the art of key out will remain a valuable skill for filmmakers, editors, and content creators alike. Whether it's creating fantastical worlds or improving live broadcasts, the ability to effectively key out elements in a scene is a powerful tool in the modern digital landscape.

在科技和数字媒体的世界中，短语key out指的是视频编辑和制作中使用的一种特定过程。这项技术主要用于从视频帧中去除特定颜色，从而允许插入不同的背景或效果。最常见的应用是绿色屏幕技术，在这种技术中，主体被拍摄在明亮的绿色背景前。这样做的目的是为了在编辑过程中更容易地key out绿色，有效隔离主体，并使编辑者能够用任何所需的场景替换背景。例如，考虑一个场景，电影制片人想要创建一个设定在遥远星球的戏剧性场景。通过在绿色屏幕前拍摄演员，他们可以轻松地key out绿色并插入令人惊叹的外星景观。这不仅增强了影片的视觉吸引力，还允许更大的创作自由，因为物理布景的限制被消除了。然而，实现干净的key out需要仔细关注照明和相机设置。如果绿色屏幕照明不佳，或者主体在其上投下阴影，则生成的镜头可能会有不必要的伪影，从而使得隔离主体变得困难。因此，摄影师必须努力实现均匀的照明，并确保主体与绿色屏幕保持适当的距离，以避免在key out过程中出现任何问题。此外，key out的概念不仅限于绿色屏幕。根据项目的需要，它也可以应用于其他颜色。例如，一些电影制片人可能选择使用蓝色屏幕，而不是绿色屏幕，尤其是在拍摄涉及绿色物体或服装的场景时。能够key out各种颜色为制作提供了灵活性，并为讲述故事开辟了新的可能性。除了电影和电视，key out技术在直播广播中也很流行。新闻主播经常在绿色屏幕前进行天气更新或特别报道。通过使用key out方法，广播公司可以在主播背后显示相关图形或图像，为观众提供更具吸引力的体验。随着技术的不断发展，用于key out过程的工具变得更加复杂。像Adobe After Effects和Final Cut Pro这样的软件程序提供了先进的功能，使编辑者能够优化他们的key out结果，包括颜色校正、边缘羽化和溢出抑制。这些增强功能确保最终产品看起来无缝且专业。总之，理解key out过程对于任何参与视频制作或编辑的人来说都是至关重要的。这项技术不仅促进了创造性的讲故事，还提高了视觉媒体的整体质量。随着技术的进步，掌握key out的艺术将继续成为电影制片人、编辑和内容创作者的重要技能。无论是创造奇幻世界还是改善直播，能够有效地key out场景中的元素都是现代数字环境中的一项强大工具。