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What's the methodology behind the stacked line graph, "Percent of pixels, across all photos"? Somewhat perplexing that this visualization contains data as far b
by neoncontrails 4y ago
What's the methodology behind the stacked line graph, "Percent of pixels, across all photos"? Somewhat perplexing that this visualization contains data as far back as the early 1800s, but then, to conclude that the world described by daguerreotypes was more colorful?
- Hamuko 4y agoThe year is the year of the object, not the year when the photo was taken. https://lab.sciencemuseum.org.uk/colour-shape-using-computer-vision-to-explore-the-science-museum-c4b4f1cbd72c https://lab.sciencemuseum.org.uk/colour-shape-using-computer...
- itsphilos 4y agoFascinating link, thank you! On that note though: How are the horizontal bars (first one right below the introduction) made? My guess is that they gathered all colours from all pixels, made a histogram, and then converted that into a horizontal stacked bar. However, the ordering seems weird, as some colours look like they appear multiple times (say for example the almost black-ish regions), disproving my histogram hypothesis. Then again, that may be due to image compression. And ordering the colour vectors would highly depend on the used colour space & the used partial order. I similarly stumbled over the image-version of these bars in section "The colours within a single object" further down, which I just don't quite understand how they're made. Does someone have insight on the methodology or maybe a link to a paper? The present methodology section seems to focus on object similarity.