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 DCR images to JNG format. This tool works for both professionals and casual users. Convert your images to JNG in seconds.
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Kodak RAW
A relic from the pioneer of digital photography.
DCR is a raw image format used by older Kodak Professional digital cameras (like the DCS Pro SLR series). Kodak was a pioneer in digital imaging, and their DCS cameras were often built on Nikon or Canon bodies but used Kodak sensors and processing. DCR files contain the raw data from these CCD sensors, which were famous for their color rendition but infamous for their noise at high ISOs.
DCR files are TIFF-based but use proprietary tags and compression. They store uncompressed or losslessly compressed sensor data. Kodak had several raw extensions (.dcr, .k25, .kdc), reflecting the chaotic early days of digital standards.
Used primarily in the late 90s and early 2000s. Kodak exited the high-end professional camera market in 2005, making this format effectively dead.
JPEG Network Graphics
JPEG compression with PNG transparency.
JNG (JPEG Network Graphics) is a sub-format of the MNG animation format. It was designed to combine the high compression of JPEG with the alpha transparency features of PNG, something that standard JPEG lacks. It essentially wraps a JPEG stream and a mask channel in a chunk-based container.
A JNG file structure mimics PNG. It uses a 8-byte signature and chunks. The image data is split into a color chunk (JDAT) which contains JPEG data, and an alpha chunk (IDAT) which contains PNG-compressed alpha mask. This allows for 'lossy color, lossless alpha' images, which is very space-efficient for photographic sprites.
Created by the PNG Development Group around 2001 as part of the MNG (Multiple-image Network Graphics) project. It failed to gain traction as MNG was rejected by Mozilla and Chromium in favor of APNG and later WebP.
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