Dynapik offers a free online tool to change image types - no need to download anything. It's quick and easy to use. You can change your XCF images to JPM format. This tool works for both professionals and casual users. Convert your images to JPM in seconds.
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GIMP Image
The native project format of the GNU Image Manipulation Program.
XCF (eXperimental Computing Facility) is the native file format of the GIMP. Like Adobe's PSD, it stores all the editing data of an image project: layers, channels, paths, guides, selections, and text layers. It allows users to save their work-in-process and resume editing later non-destructively.
The format is a container for a hierarchy of image structures. Since GIMP 2.10 (2018), XCF supports high bit depth (up to 32-bit floating point) and zlib compression. Older versions were 8-bit only. Note that ImageMagick's support for XCF is often limited to flattening the image or extracting the composite preview.
Named after the XCF student group at UC Berkeley where GIMP was originally written.
JPEG 2000 Compound Image
JPEG 2000 for multi-layer documents.
JPM (JPEG 2000 Part 6) is a compound image file format. It is designed for storing document images that contain a mix of text and graphics, using a Mixed Raster Content (MRC) model. It allows for different compression methods to be applied to different 'layers' of the image (e.g., sharp edges for text, smooth gradients for photos).
JPM splits an image into multiple layers (e.g., background, foreground mask, foreground color). Each layer can be compressed differently (e.g., JBIG2 for text mask, JPEG 2000 for background photos), optimizing both quality and file size for scanned documents. This is significantly more efficient than compressing an entire scanned page as a single JPEG 2000 image.
Part of the JPEG 2000 standard (ISO/IEC 15444-6), specifically targeting the document archival market.
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