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 ERF images to JPM format. This tool works for both professionals and casual users. Convert your images to JPM in seconds.
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Epson RAW
The raw format for the cult classic Epson R-D1.
ERF is the raw format used by the Epson R-D1, the world's first digital rangefinder camera. Released in 2004, the R-D1 is a cult classic among camera enthusiasts for its analog handling (it even has a film advance lever to cock the shutter). ERF files contain the raw data from the camera's 6-megapixel CCD sensor.
ERF is a TIFF-based raw format. It is relatively simple compared to modern formats, storing 12-bit data.
Epson only made one digital camera line (R-D1, R-D1s, R-D1x). The format died with the discontinuation of the R-D1x in 2014.
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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