Convert PDB GRAPHICS to JNG

The PDB (Palm Database ImageViewer) file extension is a format used primarily in Palm OS devices for storing bitmap images. Known also as FireViewer or TinyViewer format, it supports grayscale images with 2, 4, or 16 shades and can be uncompressed or use RLE compression. This format was integral to Palm OS applications like Image Viewer III, facilitating efficient image storage and viewing on early mobile devices.

The JPEG Network Graphics (JNG) file extension is designed for storing JPEG-encoded image data within the PNG file format. Introduced as part of the MNG (Multiple-image Network Graphics) format, JNG was created to provide a flexible, high-quality image format that supports both lossy and lossless compression. It is particularly useful in applications requiring the integration of JPEG compression within a wider range of data types and multimedia elements. Though not widely adopted, JNG offers enhanced compatibility and versatility for complex imaging tasks in computer graphics and web development.