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A DPX (short for Digital Picture Exchange) file is a professional digital image file format used primarily in the film and video industry. It is a high-resolution file format that is commonly used for post-production work such as color correction and visual effects.

DPX files are typically used to store individual frames of a motion picture or video sequence in a lossless format, which means that the image data is not compressed or degraded in any way. DPX files can store a wide range of information, including color space, bit depth, and image metadata, making them useful for a variety of applications.

DPX files are often used in film scanning, where the individual frames of a film are scanned into digital format for restoration, remastering, or archival purposes. They are also used in digital intermediate processes, where color grading and other post-production work is performed on the digital files before being output to a final film or video format.