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基于空间部分相千光成像理论,分析了编码相位片形成的假彩色及振幅光栅和相位光栅对这种假彩色的调节作用,求得了精确解. 相似文献
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利用部分相干光成像理论,推出傅科(Foucault)刀口相位检测时非相干光入射情况下的像面光强分布.分析表明,在一定条件下,可得到输入物函数相位变化率分布的信息.同时提出一种获取物相位变化率信息的装置,并分析了该装置的成像情况. 相似文献
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本文提出了一种专门制作的全息元件作照明器的图象处理系统,它可以利用白光照明实时处理大面积图象。这种系统可以进行两张图象差异的彩色显示、黑白图象的假彩色编码和彩色合成,以及对体视对图片的体视观察等。本文最后给出了实验结果。 相似文献
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白光照明载频照相法能产生相当于剪切干涉的莫尔条纹,本文提出用色散棱镜进行条纹的假彩色编码,使得测量上更灵敏和视觉上更舒适.首先讨论了以有限口径成像产生莫尔剪切干涉的方法,然后分析了色散假彩色编码的原理并导出了相位折射角和编码色之间关系,最后给出了实验结果. 相似文献
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借助模糊函数理论分析了空间周期相干光照明产生的自成像现象及Lau效应。理论分析结果表明:当照明光源满足一定条件时,会出现自成像现象及Lau效应。根据分析结果讨论了这些现象的可能应用。 相似文献
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依据阿贝成像原理,相干光照明下的物通过透镜成像,当频谱有所丢失时,像就不完全与物相似,由此使黑白光栅在相干光照明下通过透镜成像,在频谱面上设置光阑,仅让±1级衍射光通过,这样在像平面就得到全息光栅,通过改变成像横向放大率能够达到改变全息光栅的空间频率的目的. 相似文献
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Xiaowei Song Gaoyang Li Lei Yang Luxiao Zhu Chunping Hou Zixiang Xiong 《Entropy (Basel, Switzerland)》2022,24(8)
With the development of convolutional neural networks, the effect of pedestrian detection has been greatly improved by deep learning models. However, the presence of pseudo pedestrians will lead to accuracy reduction in pedestrian detection. To solve the problem that the existing pedestrian detection algorithms cannot distinguish pseudo pedestrians from real pedestrians, a real and pseudo pedestrian detection method with CA-YOLOv5s based on stereo image fusion is proposed in this paper. Firstly, the two-view images of the pedestrian are captured by a binocular stereo camera. Then, a proposed CA-YOLOv5s pedestrian detection algorithm is used for the left-view and right-view images, respectively, to detect the respective pedestrian regions. Afterwards, the detected left-view and right-view pedestrian regions are matched to obtain the feature point set, and the 3D spatial coordinates of the feature point set are calculated with Zhengyou Zhang’s calibration method. Finally, the RANSAC plane-fitting algorithm is adopted to extract the 3D features of the feature point set, and the real and pseudo pedestrian detection is achieved by the trained SVM. The proposed real and pseudo pedestrian detection method with CA-YOLOv5s based on stereo image fusion effectively solves the pseudo pedestrian detection problem and efficiently improves the accuracy. Experimental results also show that for the dataset with real and pseudo pedestrians, the proposed method significantly outperforms other existing pedestrian detection algorithms in terms of accuracy and precision. 相似文献
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利用空间滤波合成狭缝彩虹全息技术对二维透射物进行假彩色编码,当参考光以不同的方向传播时,记录二维透射物的不同空间频谱所对应的物像,全息图在白光再现时将透镜平移就呈现不同颜色全息效果图。 相似文献
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提出一种在显微镜照明光路上实现假彩色编码的方法,即在照明光路上对光源进行分区彩色编码,以得到彩色化的显微图像。 相似文献
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为适应人眼的感知能力,伪彩色编码技术常被用于处理红外探测系统输出的灰度图像。较于灰度图像,计算机对彩色图像处理所需的存储量与计算量较大。鉴于某些红外设备只提供伪红外图像的输出,因此伪红外图像的去彩色化算法成为该文的主要研究目标。除利用最大值分解、平均值与光亮度法3种常见灰度化算法对伪红外图像的处理外,直接对伪彩色图像进行解码的方式也在文中被用于红外图像的去彩色化。实验基于上述两类方法,对线性与正弦非线性彩虹伪彩色图像的去彩色化进行了研究,并对处理后图像的质量进行了比较。实验结果表明,常规灰度算法处理后的伪彩色图像质量较差,而线性伪彩色图像经解码处理后可完全恢复出原图,实现0均方差;对于正弦非线性算法,虽然存在由量化误差引起的损失,但与原图像比仍有非常低的均方差(0.309 4)与高的峰值信噪比(101.356 0)。 相似文献
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Chen Zaiqing Liu Hui Xiong Qi Huang Xiaoqiao Tai Yonghang Shi Junsheng 《Optical Review》2023,30(1):50-60
Optical Review - The stereo image consisting of an achromatic image and a chromatic image (mixed stereo pair) can be fused as a three-dimensional (3D) color scene by human observers. It is said... 相似文献
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In this paper, an anaglyph stereo visualization is studied by the use of a single image and depth information. The present technique allows the stereo visualization of the target image without binocular camera, which has been used for generating the standard anaglyphs. Three test cases are shown in this work, which covers the generation of monochrome anaglyph from given geometrical information, and that of monochrome and color anaglyph from depth information evaluated from other imaging devises, which are placed in parallel. The experimental depth information of the target image is evaluated from the correlation-based template matching analysis of the random dot patterns optically projected on the target objects. Examples of anaglyph stereo visualization are shown for scientific art, such as the monochrome cube, monochrome plaster figure and the color artificial flowers. These results indicate that the present technique of anaglyph stereo visualization through the depth information is very useful and widely applicable to the general three-dimensional visualization. 相似文献