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Epson RAW
The raw format for the cult classic Epson R-D1.
ERF is the raw format used by the Epson R-D1, the world's first digital rangefinder camera. Released in 2004, the R-D1 is a cult classic among camera enthusiasts for its analog handling (it even has a film advance lever to cock the shutter). ERF files contain the raw data from the camera's 6-megapixel CCD sensor.
ERF is a TIFF-based raw format. It is relatively simple compared to modern formats, storing 12-bit data.
Epson only made one digital camera line (R-D1, R-D1s, R-D1x). The format died with the discontinuation of the R-D1x in 2014.
Microsoft Windows Cursor
The standard format for static mouse cursors on Microsoft Windows.
The CUR format is the standard file format for static mouse cursors in the Microsoft Windows operating system. It is structurally almost identical to the ICO (Icon) format, with one key difference: the header contains a defined 'hotspot'. The hotspot specifies the exact pixel coordinate (x, y) that registers the click, such as the tip of an arrow pointer.
A CUR file starts with a header similar to an ICO file, but the 'image type' field is set to 2 (Cursor) instead of 1 (Icon). For each image in the file (it can contain multiple sizes/depths), the directory entry stores the hotspot X and Y coordinates instead of the color planes/bpp fields found in ICOs. The image data itself is typically a BMP with a 1-bit AND mask for transparency, or a PNG in modern versions.
Introduced with Windows 1.0, the format has evolved alongside Windows. Originally supporting only monochrome, it grew to support 16 colors, 256 colors, and finally 32-bit alpha-blended cursors in Windows XP.
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