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 SR2 images to JNG format. This tool works for both professionals and casual users. Convert your images to JNG in seconds.
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Sony RAW 2
The predecessor to the modern ARW format.
SR2 is an older raw image format used by early Sony digital cameras, particularly the Cyber-shot R1 and early DSLRs before the Alpha branding fully took over with the ARW format. It contains raw sensor data, allowing for the same kind of editing flexibility as modern raw files, but from older sensor technology.
SR2 is a TIFF-based format. It typically stores 12-bit data. The encryption used in SR2 files was a point of contention in the early days of open-source raw decoding.
Sony used SRF, then SR2, and finally settled on ARW. SR2 represents the middle child of this evolution.
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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