acutance

简明释义

英[/əˈkjuːtəns/]美[/əˈkjuːtəns/]

n. [摄] 锐度；锐度曲线

英英释义

单词用法

同义词

反义词

例句

1.Experiment shows that acutance function method is better than mean square error function method. The error factors are analyzed and corresponding improvement approaches are put forward.

实验结果表明在该系统中锐度函数法作判据的效果要优于均方差函数法，最后分析误差因素并提出修正途径。

2.Experiment shows that acutance function method is better than mean square error function method. The error factors are analyzed and corresponding improvement approaches are put forward.

实验结果表明在该系统中锐度函数法作判据的效果要优于均方差函数法，最后分析误差因素并提出修正途径。

3.In digital imaging, acutance can be affected by the sharpening algorithms used.

在数字成像中，使用的锐化算法会影响锐度。

4.The artist preferred a medium that offered high acutance for her detailed work.

这位艺术家更喜欢一种提供高锐度的媒介来进行她的细致创作。

5.High acutance is essential for capturing fine details in landscape photography.

高锐度对于捕捉风景摄影中的细节至关重要。

6.The photographer adjusted the contrast to enhance the acutance of the image.

摄影师调整了对比度，以增强图像的锐度。

7.The print had excellent acutance, making the text easy to read.

这幅印刷品的锐度极佳，使得文本易于阅读。

作文

A photograph is often judged by its ability to convey a message or emotion, but one of the most critical aspects that contribute to the overall quality of an image is its sharpness. This sharpness is technically referred to as acutance, which describes the perceived edge contrast in an image. In simpler terms, acutance can be understood as how well-defined the edges of objects are in a photograph. High acutance means that the edges appear crisp and clear, while low acutance results in softer, more blurred edges.When discussing photography, it is essential to differentiate between actual sharpness and acutance. Actual sharpness refers to the resolution and detail captured by the camera sensor, while acutance is more about the way those details are perceived by the human eye. For instance, an image may have high resolution but low acutance if the edges are not well defined. Conversely, an image with lower resolution can still appear sharp if it has high acutance due to strong contrast at the edges.One of the factors that influence acutance is the lighting condition during photography. Side lighting, for example, can enhance the acutance of an image by creating shadows that emphasize edges. This technique is often used in portrait photography to create a three-dimensional effect, making the subject stand out against the background. Additionally, post-processing techniques such as sharpening filters can artificially increase acutance, but this must be done carefully to avoid introducing artifacts that can detract from the image quality.Another important consideration when aiming for high acutance is the choice of lens. Lenses with high-quality optics tend to produce images with better acutance because they minimize optical aberrations that can soften edges. Photographers often invest in prime lenses, which typically have fewer glass elements and better optical performance compared to zoom lenses, resulting in higher acutance and overall image quality.Furthermore, the concept of acutance extends beyond photography into other visual arts, such as painting and graphic design. Artists often use contrasting colors and sharp lines to create a sense of acutance in their work, guiding the viewer's eye and enhancing the overall impact of the piece. In graphic design, achieving high acutance is crucial for creating visually appealing layouts that draw attention and communicate effectively.In conclusion, understanding acutance is vital for anyone interested in photography or visual arts. It plays a significant role in how images are perceived and appreciated. By focusing on factors such as lighting, lens selection, and post-processing techniques, photographers can enhance the acutance of their images, resulting in striking visuals that leave a lasting impression on viewers. Ultimately, mastering acutance not only improves technical skills but also elevates the artistic expression in visual media.

一张照片常常通过其传达信息或情感的能力来评判，但影响图像整体质量的最关键方面之一是其清晰度。这个清晰度在技术上被称为acutance，它描述了图像中边缘对比度的感知。简单来说，acutance可以理解为照片中物体边缘的清晰程度。高acutance意味着边缘看起来清晰而明确，而低acutance则导致边缘更柔和、更模糊。在讨论摄影时，区分实际清晰度和acutance是至关重要的。实际清晰度指的是相机传感器捕捉到的分辨率和细节，而acutance更多的是关于这些细节在人眼中的感知。例如，如果边缘不够清晰，一幅图像可能具有高分辨率但低acutance。相反，如果一幅图像的边缘对比强烈，即使分辨率较低，也可能因为高acutance而显得清晰。影响acutance的因素之一是拍摄时的光照条件。例如，侧光可以通过创造强调边缘的阴影来增强图像的acutance。这种技巧常用于人像摄影，以创建三维效果，使主体从背景中突出。此外，后期处理技术如锐化滤镜可以人为地增加acutance，但这必须小心进行，以避免引入可能削弱图像质量的伪影。当追求高acutance时，镜头选择也是一个重要考虑因素。高质量光学的镜头往往会产生更好的acutance图像，因为它们最小化了可能使边缘变软的光学畸变。摄影师通常会投资于定焦镜头，这些镜头通常比变焦镜头具有更少的玻璃元件和更好的光学性能，从而产生更高的acutance和整体图像质量。此外，acutance的概念超越了摄影，延伸到其他视觉艺术，如绘画和图形设计。艺术家常常使用对比色和锐利的线条来在其作品中创造acutance的感觉，引导观众的视线并增强作品的整体影响力。在图形设计中，实现高acutance对于创建视觉吸引人的布局至关重要，这能够吸引注意力并有效传达信息。总之，理解acutance对于任何对摄影或视觉艺术感兴趣的人都是至关重要的。它在图像的感知和欣赏中起着重要作用。通过关注光照、镜头选择和后期处理技术等因素，摄影师可以提高其图像的acutance，从而产生引人注目的视觉效果，给观众留下深刻的印象。最终，掌握acutance不仅提升了技术技能，还提升了视觉媒体中的艺术表达。