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PDH can convert images into a compact hash code and perform fast and memory-saving searching for large-scale images. Furthermore, by applying PDH to biometric information such as vein patterns and faces, a hands-free authentication platform that identifies individuals from a large-scale biometric database can be established.

2018年9月26日 · A graph is plotted, with the pixel difference value on X-axis and frequency on Y-axis. The curve obtained is called the PDH. The PDH of original image will be a smooth curve. If the PDH of stego image is also a smooth curve then steganography is not detected. If the PDH of stego image shows step effects, then steganography is identified.

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Download scientific diagram | Pixel Difference Histogram (PDH) for input images and marked images (part I) from publication: Reversible data hiding techniques with high message embedding...

One directional Pixel Difference Histogram (PDH) analysis for identification of pixels in image is studied in [15]. As a real-world case study, the GOA-DE algorithm solves visual tracking issues....

We present visualization and layout algorithms that can enhance informal story-telling using personal digital data such as photos in a face-to-face social setting.

In this paper, we present visualization and layout algorithms that can enhance informal storytelling using personal digital data such as photos, audio and video in a face-to-face social setting.

2025年2月24日 · PDH（Plesiochronous Digital Hierarchy），即准同步数字体系。 作为第一代 光通信 的标准，规定了一系列的速率等级和等级间的复用方法。 PDH的各速率等级称为一次群、二次群…五次群，将 数字信号 以固定的速率进行传输。 简单来说，就是PDH规定了一系列大小不同的 容器 （次群）来容纳不同数量的信号，可以满足不同业务需求。 可以把次群当做是粗细不同的水管，细的水管（低次群）流速（传输速率）较慢，粗的水管（高次群）流速（传输速率）较 …

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