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2. Dots per inch - Wikipedia

   en.wikipedia.org/wiki/Dots_per_inch

   Dots per inch (DPI, or dpi[1]) is a measure of spatial printing, video or image scanner dot density, in particular the number of individual dots that can be placed in a line within the span of 1 inch (2.54 cm). Similarly, dots per centimetre (d/cm or dpcm) refers to the number of individual dots that can be placed within a line of 1 centimetre ...

3. Comparison of graphics file formats - Wikipedia

   en.wikipedia.org/wiki/Comparison_of_graphics...

   Anima-tion. Layers. Color manage-ment. Extend-. ­able. HDR format. CMYK. ^ Supports raster data embedding with the use of Base64.

4. Pixel density - Wikipedia

   en.wikipedia.org/wiki/Pixel_density

   JPEG: Pixel Raster No Implicit when density is set Optional PPI or PPCM, 2 bytes each for horizontal and vertical directions [26] PDF: Length Both Yes Yes Explicit Explicit DPI (PPI) for rasterized images, fonts or effects PNG: Pixel Raster No Implicit when density is set Optional PPM, 4 bytes each horizontal and vertical directions [27] PPM ...

5. Image file format - Wikipedia

   en.wikipedia.org/wiki/Image_file_format

   An image file format is a file format for a digital image. There are many formats that can be used, such as JPEG, PNG, and GIF. Most formats up until 2022 were for storing 2D images, not 3D ones. The data stored in an image file format may be compressed or uncompressed. If the data is compressed, it may be done so using lossy compression or ...

6. Group 4 compression - Wikipedia

   en.wikipedia.org/wiki/Group_4_compression

   CCITT Group 4 compression, also referred to as G4 or Modified Modified READ (MMR), is a lossless method of image compression used in Group 4 fax machines defined in the ITU-T T.6 fax standard. It is only used for bitonal (black-and-white) images. Group 4 compression is based on the Group 3 two-dimensional compression scheme (G3-2D), also known ...

7. Image resolution - Wikipedia

   en.wikipedia.org/wiki/Image_resolution

   Image resolution is the level of detail of an image. The term applies to digital images, film images, and other types of images. "Higher resolution" means more image detail. Image resolution can be measured in various ways. Resolution quantifies how close lines can be to each other and still be visibly resolved.