How many phones can you spot in this picture?
The core of OsmAnd's HH-Routing is an elegant two-level hierarchy built upon "area clusters."
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Need something brilliant to read this weekend? Here are six of our favourite pieces from the last seven days
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?