Retaining DPI/PPI Information with PNGGauntlet

I’ve mentioned PNGGauntlet many times on this blog – it’s a great tool for squeezing the best compression ratios out of the PNG format. It combines the tools PNGOUT, OptiPNG and DeflOpt in a nice WinForms GUI. As part of the compression process, most chunks are removed by default. This includes the pHYs chunk, which […]

Pixel-perfect Multi-DPI Images in WPF (Part 3)

View source on GitHub. In Part 1 of this series, I discussed the problem of displaying different bitmap images at different DPIs in WPF. In Part 2, I proposed a solution using multi-frame TIFFs and two simple markup extensions. In this final post I will present a basic program that takes multiple images (PNG recommended), […]