acutance

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02:54 Apr 13, 2010
English to Chinese translations [PRO]
Art/Literary - Photography/Imaging (& Graphic Arts)
English term or phrase: acutance
Definition from photographytips.com:
A measure of the sharpness with which the film can produce the edge of an object.

Example sentence(s):
  • In broad terms, digital really out performs film in rendering high acutance images. In theory, pixels side by side, could make abrupt changes in contrast. However film, with its layers of silver halide crystals, can never render the same degree of edge sharpness. Mark Cassino
  • The acutance is the geometric mean of the slope of the edge trace divided by the overall density difference. Acutance in a photographic emulsion depends to a large extent on the nature of the developer used. Net Industries and its Licensors
  • One often quoted property of Rodinal is that it increases the grain of the film, that isn't true. At the 1:25 dilution the developer will give you very similar results to any general purpose developer in both apparent grain and acutance, higher dilutions will show progessively more grain along with increased accutance. Mark Antony Smith
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Summary of translations provided
5锐度
Thinkcell Wang


  

Translations offered


23 days   confidence: Answerer confidence 5/5
锐度


Definition from 互动百科:
所谓锐度,在有的地方又叫“清晰度”,它是反映图像平面清晰度和图像边缘锐利程度的一个指标。如果将锐度调高,图像平面上的细节对比度也更高,看起来更清楚。比如,在高锐度的情况下,不但画面上人脸的皱纹、斑点更清楚,而且脸部肌肉的鼓起或凹下也可表现得栩栩如生。在另一种情况下,即垂直方向的深色或黑色线条,或黑白图像突变的地方,在较高锐度的情况下,线条或黑白图像突变的交接处,其边缘更加锐利,整体画面显得更加清楚。因此,提高锐度,实际上也就是提高了清晰度,这是人们需要的、好的一面。

Example sentence(s):
  • 人眼并不能分辨物体的细节本身,而是通过分辨细节的边缘来判定其锐度,因此很多人将高锐度的照片误以为高分辨率的照片,其实这是人眼观察和分辨物体的特点带来的认识误区———数码照片属于高锐度、低分辨率影像,而传统胶卷则是高分辨率、低锐度影像,很多读者认为数码照片分辨率高,正是这种误区的具体体现。顺带提及的是,光学中锐度的英文是“acutance”而非大多数媒体所用的“sharpness”。 - pcpop  

Explanation:
《新牛津英汉双解大词典》(The New Oxford E-C Dictionary)
Thinkcell Wang
China
Local time: 03:02
Native speaker of: Native in ChineseChinese
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