Design īecause many raw image formats are specific to one make or model of camera, dcraw is frequently updated to support new models. So here is my mission: Write and maintain an ANSI C program that decodes any raw image from any digital camera on any computer running any operating system.
In contrast to proprietary decoding software, dcraw strives for simplicity, portability, and consistency, as expressed by its author: Given this ever-expanding plethora of raw image formats, and uncertain and inconsistent support for them by the manufacturers, many photographers worry that their valuable raw images may become unreadable as the applications and operating systems required become obsolete. The file formats themselves are often undocumented, and several manufacturers have gone so far as to encrypt all or part of the data in their raw image format, in an attempt to prevent third-party software from accessing it. While most camera manufacturers supply raw image decoding software for their cameras, this software is almost always proprietary, and often becomes unsupported when a camera model is discontinued. The development has stalled, with only two releases since May 2015 and the last release dated June 2018, but parts of dcraw are included in LibRaw. Versions up to 3.15 used the name Canon PowerShot Converter, starting with v3.40 the name was Raw Photo Decoder, switching to Raw Photo Decoder "dcraw" in v5.70. Version 1.0 was released in revision 1.18, on May 5, 2000. This conversion is sometimes referred to as developing a raw image (by analogy with the process of film development) since it renders raw image sensor data (a "digital negative") into a viewable form.Ī number of other image processing programs use dcraw internally to enable them to read raw files.ĭevelopment of dcraw began on February 23, 1997.
dcraw converts these images into the standard TIFF and PPM image formats.
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