Convert DNG to PHM

The Digital Negative (DNG) file extension, developed by Adobe Systems and introduced in 2004, is an open, lossless raw image format designed for digital photography. DNG aims to provide a standardized format for raw files, ensuring compatibility across various software and hardware platforms. It is based on the TIFF/EP standard and incorporates extensive metadata, making it suitable for long-term archival purposes. DNG files are widely supported by numerous camera manufacturers and software applications, facilitating efficient storage, sharing, and editing of high-quality images.

The PHM file extension stands for Portable Float-map Image (16-bit half), a format used for storing High Dynamic Range (HDR) images with 16-bit half-precision floating-point values. This format is particularly useful in applications requiring precise color representation and extensive dynamic range, such as computer graphics, image processing, and scientific visualization. Originating from the Portable FloatMap (PFM) format, PHM was developed to provide a more efficient storage solution by utilizing half-precision floats, thereby reducing file size while maintaining significant detail and accuracy.