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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.

HDR (Radiance RGBE image format) is an image file format designed to store images with a broad range of luminance levels, from deep shadows to bright highlights, capturing more detail in both areas than standard digital imaging formats. This format is commonly used in photography and computer graphics to achieve more realistic or artistically enhanced representations of light in images. However, HDR files can be larger in size, and they require compatible software and displays to fully appreciate the enhanced dynamic range.