Apr 19 · 27 min read · TLDR: A watermark tells Spark Structured Streaming: "I will accept events up to N minutes late, and then I am done waiting." Spark tracks the maximum event time seen per partition, takes the global mi
Join discussionJan 29 · 3 min read · In modern office environments, the security of PDF documents has become increasingly important. Adding watermarks is an effective means to ensure data security and prevent unauthorized copying. This article will introduce how to use Python's Spire.PD...
Join discussionSep 16, 2024 · 5 min read · Have you ever wondered how websites automatically generate watermarks on uploaded images? If you're curious about how it's done, you're in the right place! In this tutorial, I will guide you on how to achieve this using Node.js and the popular image-...
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Jul 11, 2024 · 2 min read · Last week, I described how to add a dynamic watermark to your images on the JVM. I didn't find any library, so I had to develop the feature, or, more precisely, an embryo of a feature, by myself. Depending on your tech stack, you must search for an e...
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Jul 4, 2024 · 3 min read · Displaying images on your website makes for an interesting problem: on one side, you want to make them publicly available; on the other, you want to protect them against undue use. The age-long method to achieve it is watermarking: A digital waterma...
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Aug 31, 2023 · 3 min read · Welcome, dear readers, to an intriguing journey through automation and Golang. Today, we're focusing on Automating PDF Watermarking using UniPDF in Golang. Whether you're a newbie just dipping your toes into the Golang waters or an expert looking to ...
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Jun 15, 2023 · 5 min read · Ensuring the security and authenticity of documents has become increasingly important today when information is easily shared and accessed all over the place. The million dollar question here is: “ How can someone really protect the security of a doc...
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Nov 6, 2022 · 1 min read · Time complexity of a watermarking scheme refers to the processing power required for embedding and extracting the watermark. This factor becomes very significant if the number of images is very large for protection.
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Nov 5, 2022 · 1 min read · In the proposed scheme, the selected scrambling method is Arnold Transform Map. Although the transform is simple in Arnold Transform Map, but it not only scrambles the pixel position by encoding the number of iterations, but it also reduces the key s...
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Nov 5, 2022 · 1 min read · Aligning two similar images from the same scene taken from different perspectives is known as image registration. This may be due to correction of different scaling factors or rotation angles. Image registration is a basic step for a variety of compu...
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