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PBM to JPE
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PBM stands for Portable Bitmap, and it is a monochrome image format that is part of the Netpbm package. It stores image data as a series of ASCII or binary values representing each pixel in the image, with 1s representing black pixels and 0s representing white pixels. PBM files are simple and easy to read but can be quite large since they do not use any compression.

The "JPE" file extension is a less common extension used for JPEG (Joint Photographic Experts Group) images. JPEG is a widely used image format known for its lossy compression, which significantly reduces file sizes while maintaining a high level of image quality, making it popular for photographs and web images. The "JPE" extension functions the same as the more common ".jpg" or ".jpeg" extensions, and it can be opened and edited with most image viewing and editing software. The reason for the different extensions simply comes down to historical variations and software preferences, and they all represent the same JPEG image format.