Dynapik offers a free online tool to change image types - no need to download anything. It's quick and easy to use. You can change your PALM images to PBM format. This tool works for both professionals and casual users. Convert your images to PBM in seconds.
Palm Pixmap
The graphics format for Palm Pilot PDAs.
The Palm Pixmap format is the native bitmap resource used by Palm OS devices (like the Palm Pilot, Tungsten, and Treo). It was designed for the constraints of early handhelds: low memory, low CPU power, and limited screen depth (initially 1-bit, then 4-bit grayscale, then 8/16-bit color).
Palm images are usually stored inside a pdb (Palm Database) container file. The pixel data itself supports multiple compression types, primarily PackBits (RLE) and ScanLine. It handles transparency via a designated transparent index color. The format is tightly coupled with the Palm OS resource manager structure.
Debuted with the original Palm Pilot in 1996. As screen technology evolved, the format was extended to support color and high density (double density) screens on devices like the Sony Clie and Palm Tungsten.
Portable Bitmap
The lowest common denominator of image formats.
PBM (Portable Bitmap) is the simplest format in the Netpbm suite, designed to represent monochrome (black and white) images. It uses a straightforward text-based (or simple binary) encoding where '1' represents black and '0' represents white (or vice versa depending on the viewer, though standard entails 1=black). It was designed to be easily emailed and processed by simple scripts.
There are two variants: P1 (ASCII) and P4 (Binary). ASCII P1: The file is human-readable text. A grid of 0s and 1s defines the image. Binary P4: The bits are packed into bytes for efficiency. The header simply states the magic number (P1 or P4) and the dimensions. There is no compression, no index, no palette.
Invented by Jef Poskanzer in the 1980s as a way to send bitmaps via email properly. It became the foundation of the 'pbmplus' (later 'netpbm') toolkit, which provided a standard way to convert between dozens of incompatible 80s file formats.
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