MRW to BMP Converter

The MRW (Minolta Raw) format is a legacy proprietary raw image file type developed by Minolta (later Konica Minolta) for its DiMAGE series of digital cameras, such as the A1 and A2. It stores unprocessed data directly from the camera's Charge-Coupled Device (CCD) sensor, preserving higher dynamic range and color depth than JPEG compression allows. The file structure encapsulates the raw pixel data alongside metadata headers containing shooting parameters like exposure compensation, white balance, and lens information, requiring specific demosaicing algorithms for rendering.

As a legacy format, MRW files are not natively supported by standard Windows or macOS image viewers without codec packs. Users require specialized post-processing software to view or edit these images. Adobe Lightroom and Photoshop (via Camera Raw) provide industry-standard support, while free alternatives include IrfanView (with plugins), XnView MP, and Darktable, which utilize the open-source LibRaw library to decode the sensor data.

The BMP (Bitmap) format, formally known as the Device Independent Bitmap (DIB) file format, is a raster graphics standard developed by Microsoft for the Windows operating system. The file structure consists of a file header (BITMAPFILEHEADER), an information header (typically BITMAPINFOHEADER), a color table, and the pixel array. Data is stored as a grid of pixels with color depths ranging from 1-bit to 32-bit, typically uncompressed, though the format supports lossless Run-Length Encoding (RLE4 or RLE8) and Huffman 1D compression for specific bit depths.

Due to its simplicity and documentation as a core Windows standard, BMP files possess near-universal compatibility. They can be opened natively by virtually all image viewers and web browsers across Windows, macOS, and Linux without additional software. Standard utilities include Microsoft Paint, Apple Preview, and Windows Photos. For advanced manipulation, pixel-based editors like Adobe Photoshop and CorelDRAW are recommended, though the format is rarely used for complex editing due to its large file size.