https://blog.alexhere.me/tags/tech/Recent content in Tech on Alex Here - BlogHugoen-usTue, 07 Apr 2026 16:08:00 +0700https://blog.alexhere.me/2026/04/07/structural-similarity-index-ssim/Tue, 07 Apr 2026 16:08:00 +0700https://blog.alexhere.me/2026/04/07/structural-similarity-index-ssim/<h1 id="why-i-built-ssim-from-scratch-for-my-vss-project">Why I Built SSIM From Scratch for My VSS Project</h1> <p>I&rsquo;ve been working on a project called Visual Secret Sharing (VSS) for my final project in uni. It&rsquo;s been a deep dive, taking color images, breaking them into shares that look like static noise (or not), and then reconstructing them. Along the way, I hit a problem: how do you actually measure if your reconstruction is any good?</p> <p>Most developers instinctively reach for MSE or PSNR when evaluating image quality. I did too at first. The problem is they measure pixel differences, not what the eye actually notices. They&rsquo;re simple to compute, sure, but they don&rsquo;t match what our eyes actually see. And when you&rsquo;re working on something as visual as image reconstruction, that&rsquo;s a pretty big problem.</p>