空间摄像机的振动检测和退化图像恢复,基于滚动快门CMOS的相关图像
Hailong Liu1, Hengyi Lv1, Chengshan Han1
1Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China.
Sensors (Basel, Switzerland)
|July 14, 2023
概括
一种新方法通过滚动快门CMOS相关成像检测卫星摄像头的振动. 这种技术可以恢复因振动而降低的图像质量,提高空间应用的成像性能.
科学领域:
- 太空光学的空间光学.
- 图像处理 图像处理
- 对振动进行分析.
背景情况:
- 卫星平台的振动会降低太空摄像机的成像质量.
- 滚动快门CMOS传感器容易受到振动诱导的图像工件的影响.
研究的目的:
- 提出一种用于探测太空摄像机中的振动参数的新方法.
- 使用滚动快门CMOS传感器开发振动损坏的图像的恢复技术.
主要方法:
- 使用滚动快门CMOS传感器的相关成像来检测振动参数.
- 分析连续成像的相对图像偏移,以获得振动特征.
- 根据检测到的振动参数和点传播函数,应用一行一行的恢复方法.
主要成果:
- 振动检测方法在2D振动的周期检测中达到<1%的精度,在振幅检测中达到<2%.
- 图像恢复方法使调制转移函数 (MTF) 指数提高了20%以上.
- 该系统使用低率序列成功检测到高频振动,适用于推式扫描和着摄像头.
结论:
- 拟议的相关性成像方法有效地检测空间摄像机振动参数.
- 开发的修复技术显著提高了由振动降低的图像质量.
- 这种方法为改善空间应用中的成像性能提供了强大的解决方案.
相关概念视频
Relative Motion Analysis using Rotating Axes
489
Consider a component AB undergoing a linear motion. Along with a linear motion, point B also rotates around point A. To comprehend this complex movement, position vectors for both points A and B are established using a stationary reference frame.
However, to express the relative position of point B relative to point A, an additional frame of reference, denoted as x'y', is necessary. This additional frame not only translates but also rotates relative to the fixed frame, making it...
However, to express the relative position of point B relative to point A, an additional frame of reference, denoted as x'y', is necessary. This additional frame not only translates but also rotates relative to the fixed frame, making it...
489
Relative Motion Analysis using Rotating Axes-Problem Solving
424
Consider a crane whose telescopic boom rotates with an angular velocity of 0.04 rad/s and angular acceleration of 0.02 rad/s2. Along with the rotation, the boom also extends linearly with a uniform speed of 5 m/s. The extension of the boom is measured at point D, which is measured with respect to the fixed point C on the other end of the boom. For the given instant, the distance between points C and D is 60 meters.
Here, in order to determine the magnitude of velocity and acceleration for point...
Here, in order to determine the magnitude of velocity and acceleration for point...
424
Relative Motion Analysis using Rotating Axes - Acceleration
357
Consider a component AB undergoing a linear motion. Along with a linear motion, point B also rotates around point A. To comprehend this complex movement, position vectors for both points A and B are established using a stationary reference frame. The absolute velocity of point B is determined by adding the absolute velocity of point A, the relative velocity of point B in the rotating frame, and the effects caused by the angular velocity within the rotating frame.
Time differentiation is...
Time differentiation is...
357
Phase Contrast and Differential Interference Contrast Microscopy
8.2K
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...
8.2K
IR Spectrum Peak Splitting: Symmetric vs Asymmetric Vibrations
1.1K
Identical bonds within a polyatomic group can stretch symmetrically (in-phase) or asymmetrically (out-of-phase). Similar to hydrogen bonding, these vibrations also influence the shape of the IR peak. Generally, asymmetric stretching frequencies are higher than symmetric stretching frequencies. For example, primary amines exhibit two distinct IR peaks between 3300–3500 cm−1 corresponding to the symmetric and asymmetric N-H stretching, while secondary amines exhibit a single...
1.1K
Relative Motion Analysis - Acceleration
382
A slider-crank mechanism converts rotational motion from the crank into linear motion of the slider or vice versa. This mechanism consists of three main parts: the crank, the connecting rod, and the slider. The movement of the slider-crank is an example of general plane motion as the fluctuating angle between the crank and the connecting rod. Consider a segment AB where point A is at the end of the slider and point B is on the diametrically opposite end to point A, on a crack. The variance in...
382


