What is HDR?

HDR似乎是每个日子都应该想要的东西。该术语在左右右转4K TVs最近，当您看到与数字和智能手机摄像机有关的情况时，您可能会认为这绝对是一件好事。但是，在摄影方面，HDR是一个特殊的技巧，并不总是具有积极的效果。

HDR是什么意思，HDR是什么？

HDR stands for High Dynamic Range, and it relates to the different degrees of brightness in an image and the range between them.

When you take a photo, your camera is trying to capture a lot of information. If the scene you're shooting has very bright and very dark spots, your camera may struggle to get all of the detail your eyes readily see. In those cases, your camera will likely leave certain sections completely black or wash out bright sections in a bright white. The result is an image you may not be satisfied with.

一个很好的例子是，当您试图在背景中带着灿烂而多云的天空拍摄朋友的照片时。除非您的朋友也照亮了，否则您的朋友可能会变得非常黑暗，或者您不会得到云的美丽细节。在这里，HDR可以通过创建一个图像来获得帮助，该图像从一个较亮和深色的部分中获取细节。

HDR摄影如何工作

通常，当面对一个场景时，某些图像将被过度曝光（全白）或不被忽视（全黑）时，您必须决定可以牺牲哪些部分。有些摄像机在所有不同的光线级别上都做得更好，而不会从最亮和最黑暗的部分中丢失细节，但总有一个限制。

Using a digital or smartphone camera's HDR setting can help get around the normal limitations in dynamic range by taking multiple photos with different exposure in quick succession. Some the photos will favor capturing the details in the darker section of the scene, while other photos will favor brighter sections. Software on the camera or phone will then combine the images into a single photo with more detail in what would have otherwise been underexposed or overexposed areas.

If you're using an HDR setting, it's important to understand how your camera is utilizing this feature. Some cameras and smartphones may create multiple files, with the final HDR photo and the photos used to create it all stored as individual files. Others may capture the photos and just create one file for the final processed image. Some cameras may also create an HDR image without taking consecutive photos, which can help avoid an issue with moving subjects.

了解HDR及其不是什么

In photography, HDR isn't something you want to use for every picture.这是哪里HDR用于电视使事情令人困惑。HDR摄影通过使明亮的部分变暗并变亮的黑暗部分来凝结图像的动态范围。在某些情况下，这有助于制造更好的图像，但也可以使照片感觉平坦。此外，如果在捕获HDR照片时正在移动的东西，则该动作会产生明显的幽灵效果。

Compare this to HDR for TVs, where the high-dynamic range is basically only an improvement. It expands the difference in brightness between the darkest parts of an image and the brightest parts, offering an increased contrast ratio. Discussions about HDR for TVs also often relate to color, but color isn't a point of differentiation between normal photography and HDR photography.