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2. Image scanner - Wikipedia

   en.wikipedia.org/wiki/Image_scanner

   Alexander Murray and Richard Morse invented and patented the first analog color scanner at Eastman Kodak in 1937. Intended for color separation at printing presses, their machine was an analog drum scanner that imaged a color transparency mounted in the drum, with a light source placed underneath the film, and three photocells with red, green, and blue color filters reading each spot on the ...

3. List of virtual printer software - Wikipedia

   en.wikipedia.org/wiki/List_of_virtual_printer...

   The following are distributed under free software licences: CC PDF Converter (discontinued) – A Ghostscript-based virtual printer. clawPDF – An open source virtual PDF/OCR/Image Printer with network sharing and ARM64 support [1]. cups-pdf – An open source Ghostscript-based virtual printer that can be shared with Windows users over the LAN ...

4. Image file format - Wikipedia

   en.wikipedia.org/wiki/Image_file_format

   The JPEG filename extension is JPG or JPEG. Nearly every digital camera can save images in the JPEG format, which supports eight-bit grayscale images and 24-bit color images (eight bits each for red, green, and blue). JPEG applies lossy compression to images, which can result in a significant reduction of the file size.

5. Grayscale - Wikipedia

   en.wikipedia.org/wiki/Grayscale

   Grayscale images have many shades of gray in between. Grayscale images can be the result of measuring the intensity of light at each pixel according to a particular weighted combination of frequencies (or wavelengths), and in such cases they are monochromatic proper when only a single frequency (in practice, a narrow band of frequencies) is ...

6. Pixel density - Wikipedia

   en.wikipedia.org/wiki/Pixel_density

   The ideal pixel density (PPI) depends on the output format, output device, the intended use and artistic choice. For inkjet printers measured in DPI it is generally good practice to use half or less than the DPI to determine the PPI. For example, an image intended for a printer capable of 600 dpi could be created at 300 ppi.

7. High Efficiency Image File Format - Wikipedia

   en.wikipedia.org/wiki/High_Efficiency_Image_File...

   [21] [22] Part 2 of the JPEG 2000 suite (ISO/IEC 15444-2 and ITU-T Rec. T.801) [23] [24] also defines a different format for storing JPEG 2000 images in files that is also based on ISOBMFF. Annex F of the JPEG XR image coding standard (ISO/IEC 29199-2 and ITU-T Rec. T.832) defines how to store JPEG XR images in HEIF container files.