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 CR2 images to JNG format. This tool works for both professionals and casual users. Convert your images to JNG in seconds.
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Canon RAW 2
The standard raw format for Canon DSLRs from 2004 to 2018.
CR2 (Canon Raw version 2) is the proprietary raw image format used by Canon EOS digital SLR cameras from the mid-2000s until the introduction of the CR3 format in 2018. If you shot with a Canon 5D Mark II, 7D, or Rebel T3i, you have thousands of these files. Like all raw formats, a CR2 file contains the unprocessed data from the image sensor. It is not an image yet; it is a dataset of light intensity values that must be 'demosaiced' by software to create a viewable picture. This allows you to change the white balance, recover highlights, and pull detail out of shadows long after the photo was taken.
CR2 is based on the TIFF file structure. It uses lossless compression to store the sensor data, which is typically 12-bit or 14-bit depending on the camera model. The file contains the raw image data, a full-size JPEG preview (for reviewing on the camera screen), and extensive 'MakerNotes' metadata that records every camera setting, from the lens used to the focus point selected.
CR2 replaced the older CRW format in 2004 with the release of the EOS 20D. It remained the standard for 14 years, making it one of the most widely supported and understood raw formats in history. It was eventually succeeded by CR3, which offers better compression.
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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