ThumbHash: A better compact image placeholder hash

ThumbHash: A very compact representation of an image placeholder. A very compact representation of an image placeholder. BlurHash: Uses BlurHash with 3x3 components for square images, 4x3 components for landscape images, and 3x4 components for portrait images. The image is reconstructed by blurring a scaled-up copy of a minimal WebP file with the VP8 chunk reinserted. In addition to these sample images, you can also drag and drop your own images to compare them here. The image is approximated using the Discrete Cosine Transform. The rationale is that the low-frequency coefficients carry most of the information, and we also want a smooth image.