A neutral gray card may be used to set exposure at a consistent level before placing the subject in the scene.
可以在拍摄前使用一张中性灰色卡片放在一个稳定高度来设置曝光。
On our table in the garden we put a blue card, and all around this blue card we put a number of different gray CARDS.
我们把一张蓝色的卡片放到花园里的桌子上，再在这张蓝色卡片的周围放上若干张不同的灰色卡片。
Unlike during daytime where the basis is (roughly) a 18% gray card, there is not really a consistent, commonly agreed upon way to expose night photos.
白天摄影大致只需要一张18%灰卡，夜间摄影与之不同，没有一致公认的固定曝光值。
According to the need of business card OCR system, this paper presents a new skew detection and correction method based on black border of gray business card image.
本文针对名片ocr系统的要求，提出了一种新的根据图像扫描时产生的黑色边缘来检测灰度名片图像倾斜角度的方法。
According to the need of business card OCR system, this paper presents a new skew detection and correction method based on black border of gray business card image.
本文针对名片ocr系统的要求，提出了一种新的根据图像扫描时产生的黑色边缘来检测灰度名片图像倾斜角度的方法。
应用推荐