相关实验视频
Updated: Jul 1, 2025

04:43
Visualizing Visual Adaptation
Published on: April 24, 2017
9.0K
概括
这项研究引入了一种新的后处理技术,用于在低光下增强图像. 该方法通过调整局部阴影和全局照明颜色来改善感知到的图像质量,优于传统的扭曲最小化方法.
科学领域:
- 计算机成像成像技术
- 计算机视觉 计算机视觉 计算机视觉
- 图像处理 图像处理
背景情况:
- 低光图像增强对于监控和自动驾驶等应用至关重要.
- 当前的方法往往优化扭曲指标 (例如,峰值信号与噪声比,结构相似性指数测量),这不能保证感知质量.
- 感知-扭曲权衡强调,尽量减少扭曲会对感知图像质量产生负面影响.
研究的目的:
- 开发一种用于低光图像的后处理方法,以提高感知质量.
- 实现与现有方法相似的结果,但视觉感知得到改善.
- 为了解决以扭曲度量为中心的增强技术的局限性.
主要方法:
- 建议采用后处理方法,采用低光图像和现有的增强图像作为输入.
- 该方法假设最小的感知修改包括局部阴影调整和全球照明颜色变化.
- 该技术旨在保持原始增强的本质,同时提高感知质量.
主要成果:
- 使用感知盲的图像质量评估指标 (例如,BRISQUE,NIQE,UNIQUE) 的定量评估显示出显著的改善.
- 用户偏好测试证实了处理图像的感知质量提高.
- 该方法成功地提高了感知到的图像质量,而没有大幅改变现有的增强算法的输出.
结论:
- 建议的后处理方法有效地提高了低光图像的感知质量.
- 它为传统方法提供了有价值的替代方案,因为它专注于感知改进,而不仅仅是最小化扭曲.
- 这种方法通过为低光场景提供更好的视觉结果,为计算色彩成像领域做出了贡献.
相关概念视频
Super-resolution Fluorescence Microscopy
7.0K
Super-resolution fluorescence microscopy (SRFM) provides a better resolution than conventional fluorescence microscopy by reducing the point spread function (PSF). PSF is the light intensity distribution from a point that causes it to appear blurred. Due to PSF, each fluorescing point appears bigger than its actual size, and it is the PSF interference of nearby fluorophores that causes the blurred image. Various approaches to achieving higher resolution through SRFM have recently been...
7.0K
Photoreceptors and Visual Pathways
6.0K
At the molecular level, visual signals trigger transformations in photopigment molecules, resulting in changes in the photoreceptor cell's membrane potential. The photon's energy level is denoted by its wavelength, with each specific wavelength of visible light associated with a distinct color. The spectral range of visible light, classified as electromagnetic radiation, spans from 380 to 720 nm. Electromagnetic radiation wavelengths exceeding 720 nm fall under the infrared category,...
6.0K
Imaging Biological Samples with Optical Microscopy
4.7K
Optical microscopy uses optic principles to provide detailed images of samples. Antonie van Leeuwenhoek designed the first compound optical microscope in the 17th century to visualize blood cells, bacteria, and yeast cells. In 1830, Joseph Jackson Lister created an essentially modern light microscope. The 20th century saw the development of microscopes with enhanced magnification and resolution.
In optical microscopy, the specimen to be viewed is placed on a glass slide and clipped on the stage...
In optical microscopy, the specimen to be viewed is placed on a glass slide and clipped on the stage...
4.7K
Depth Perception and Spatial Vision
651
Depth perception is the ability to perceive objects three-dimensionally. It relies on two types of cues: binocular and monocular. Binocular cues depend on the combination of images from both eyes and how the eyes work together. Since the eyes are in slightly different positions, each eye captures a slightly different image. This disparity between images, known as binocular disparity, helps the brain interpret depth. When the brain compares these images, it determines the distance to an object.
651
Phase Contrast and Differential Interference Contrast Microscopy
8.0K
Phase-Contrast Microscopes
In-phase-contrast microscopes, interference between light directly passing through a cell and light refracted by cellular components is used to create high-contrast, high-resolution images without staining. It is the oldest and simplest type of microscope that creates an image by altering the wavelengths of light rays passing through the specimen. Altered wavelength paths are created using an annular stop in the condenser. The annular stop produces a hollow cone of...
In-phase-contrast microscopes, interference between light directly passing through a cell and light refracted by cellular components is used to create high-contrast, high-resolution images without staining. It is the oldest and simplest type of microscope that creates an image by altering the wavelengths of light rays passing through the specimen. Altered wavelength paths are created using an annular stop in the condenser. The annular stop produces a hollow cone of...
8.0K

