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 DCX format. This tool works for both professionals and casual users. Convert your images to DCX 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.
DCX (Multi-page PCX)
A legacy multi-page image format created for PC-based fax software.
DCX is a multi-page bitmap image format that essentially acts as a container for multiple PCX files. It was developed by ZSoft Corporation, the same company that created PC Paintrush and the PCX format. The primary purpose of DCX was to serve as the file format for early digital fax software, allowing a multi-page document to be stored in a single computer file. Technically, a DCX file begins with a header containing a list of offsets (pointers) to the individual PCX images stored within the file. Each 'page' is a fully valid PCX image with its own header and palette. The format relies on the simple RLE (Run-Length Encoding) compression inherited from PCX, which is efficient for simple black-and-white fax documents but poor for complex photographs.
A DCX file consists of a 4-byte signature (987654320) followed by an array of up to 1024 32-bit integer offsets. Each offset points to the start of a PCX image structure within the file. The list ends with a zero (null) terminator. Because it is wrappers around PCX, it shares all the characteristics of that format: support from 1-bit monochrome up to 24-bit RGB color. However, since it was primarily used for faxing, the vast majority of DCX files encountered today are 1-bit black and white.
DCX became popular in the early 1990s alongside the rise of fax modems and software like WinFax. It allowed users to scan or 'print' a document to a fax driver, which would save the pages as a linear .dcx file before transmission. As PDF became the dominant document format and email replaced faxing, DCX faded into obsolescence.
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