Convert ora to otb

What is the difference between .ora and .otb?

Developer: The OpenRaster Image File format was created by the OpenRaster project.; Nokia

Description: Image file saved in the OpenRaster format, and open raster graphics format that supports multiple layers; supports multiple layers and contains both image data and metadata, including XMP and EXIF tags.; The OTB (Nokia Over The Air Bitmap Image) file format is a type of image file developed for use on Nokia mobile devices. These files are specifically optimized for efficient transmission and display on Nokia phones, particularly older models. The OTB format is designed to be compact to facilitate over-the-air (OTA) transmission, which was an essential feature in the era of limited bandwidth and data transfer capabilities. The format supports monochrome graphics, making it suitable for simple images like icons and logos.