Fig. 9: Illustration of image reconstruction using two image dictionaries.
From: Learning low-rank latent mesoscale structures in networks
The (a) image Woman with a Parasol - Madame Monet and Her Son (Claude Monet, 1875). In (b, c), we show reconstructions of the image. The image in (b) is a reconstruction of the image in (a) using the dictionary with 25 basis images of size 21 × 21 pixels in (d). We uniformly randomly choose the color of each pixel from all possible colors (which we represent as vectors in [0, 256]3 for red–green–blue (RGB) weights). The image in (c) is a reconstruction of the image in (a) using the dictionary with 25 basis images of size 21 × 21 pixels in (e). We learn this basis from the image in (f) using NMF. The image in (f) is from the collection Die Graphik Ernst Ludwig Kirchners bis 1924, von Gustav Schiefler Band I bis 1916 (Accession Number 2007.141.9, Ernst Ludwig Kirchner, 1926). We use the images in (a, f) with permission from the National Gallery of Art in Washington, DC, USA.
