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Count unique parameters (after weight tying/deduplication)
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Deploying a Bootc Image#Let’s take a fairly simple and concrete case: I want to install Fedora Silverblue on one of my servers using a system prepared with Bootc. As explained previously, Bootc uses OCI images, so we’ll start by creating a Containerfile (equivalent to a Dockerfile but for podman).
SSIM (Structural Similarity Index Measure) compares two images by evaluating luminance, contrast, and structural patterns across local windows. It returns a score from -1 to 1: 1.0 means the images are pixel-identical, 0 means no structural correlation, and negative values mean the images are anti-correlated (less alike than random noise). For glyph comparison, it answers the question: do these two rendered characters share the same visual structure?