Convert OTB to CGM

Understanding OTB and CGM file formats

OTB (Over The Air Bitmap) is a monochrome image format primarily used in older mobile phones for simple graphics, such as icons and logos. It is a compact, black-and-white bitmap format with limited support in modern software.

CGM (Computer Graphics Metafile) is a vector graphics file format used for 2D graphics. It is widely adopted in technical illustration, engineering, and aviation industries due to its scalability and support for both vector and raster elements.

Why convert OTB to CGM?

Converting an OTB file to CGM allows you to use simple mobile graphics in professional or technical documents that require scalable vector images. This is especially useful for integrating legacy mobile graphics into modern workflows or documentation systems.

How to convert OTB to CGM

Direct conversion from OTB to CGM is not commonly supported by most mainstream graphics software. The process typically involves two steps:

1. Convert OTB to a common raster format (such as PNG or BMP) using a tool like XnConvert or IrfanView.
2. Convert the raster image to CGM using a vectorization tool such as Inkscape or Potrace (for black-and-white images).

Recommended software for OTB to CGM conversion

• XnConvert: Free batch image converter that supports OTB as input. Export your OTB file to PNG or BMP.
• Inkscape: Open-source vector graphics editor. Import the PNG/BMP, then use Path → Trace Bitmap to vectorize, and File → Save As to export as CGM.
• Potrace: Command-line tool for converting bitmaps to vector graphics, including CGM output.

Step-by-step conversion process

1. Open your OTB file in XnConvert or IrfanView.
2. Export the image as PNG or BMP (File → Save As).
3. Open the PNG/BMP in Inkscape.
4. Use Path → Trace Bitmap to convert the raster image to vector.
5. Go to File → Save As and select CGM as the output format.

Tips for best results

• Since OTB images are monochrome, vectorization is straightforward and yields clean CGM files.
• Check the CGM output in a compatible viewer to ensure fidelity.