画面を分割していく手法 まとめ
Treemaps for space-constrained visualization of hierarchies
Treemapの歴史。有名所がまとまってる。
まずはここを見ると良いかもしれない。
Squarified Treemaps
Treemapの各領域を正方形に近づけたやつ
短くわかりやすくアルゴリズムを説明してある
The first step of our algorithm is to split the initial rectangle. We choose for a hori- zontal subdivision, because the original rectangle is wider than high. We next fill the left half. First we add a single rectangle (figure 4). The aspect ratio of this first rectangle is 8/3. Next we add a second rectangle, above the first. The aspect ratios improve to 3/2. However, if we add the next (area 4) above these original rectangles, the aspect ratio of this rectangle is 4/1. Therefore, we decide that we have reached an optimum for the left half in step two, and start processing the right half.
The initial subdivision we choose here is vertical, because the rectangle is higher than wide. In step 4 we add the rectangle with area 4, followed by the rectangle with area 3 in step 5. The aspect ratio decreases. Addition of the next (area 2) however does not improve the result, so we accept the result of step 5, and start to fill the right top partition.
newsmap
分割方法としてはおそらくSquarified Treemapsの応用。
Newsmap is an application that visually reflects the constantly changing landscape of the Google News news aggregator.
