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2. Enlarger - Wikipedia

   en.wikipedia.org/wiki/Enlarger

   In the 1870s hand-coloured enlargements from carte-de-visite prints and daguerreotypes as well as existing negatives were offered for sale in London, England for two shillings for an A4 print, and three pounds for a life size bust. R. L. Elliot & Company, of King's Road could print up to 25" x 20" from quarter plate negatives in 1878 using ...

3. Digital image - Wikipedia

   en.wikipedia.org/wiki/Digital_image

   A digital image is an image composed of picture elements, also known as pixels, each with finite, discrete quantities of numeric representation for its intensity or gray level that is an output from its two-dimensional functions fed as input by its spatial coordinates denoted with x, y on the x-axis and y-axis, respectively. [1]

4. Image scaling - Wikipedia

   en.wikipedia.org/wiki/Image_scaling

   Image scaling can be interpreted as a form of image resampling or image reconstruction from the view of the Nyquist sampling theorem.According to the theorem, downsampling to a smaller image from a higher-resolution original can only be carried out after applying a suitable 2D anti-aliasing filter to prevent aliasing artifacts.

5. Photo print sizes - Wikipedia

   en.wikipedia.org/wiki/Photo_print_sizes

   The alternative Super series, denoted SnR, nR Plus or nR+, has an aspect ratio of 3∶2 (or as close as possible) and thus provides a better fit for standard 135 film (35 mm) at sizes of 8 inches or above. 5R is twice the size of a 2R print, 6R twice the size of a 4R print and S8R twice the size of 6R. 4D/6D is a newer size for most consumer ...

6. Image file format - Wikipedia

   en.wikipedia.org/wiki/Image_file_format

   The size of raster image files is positively correlated with the number of pixels in the image and the color depth (bits per pixel). Images can be compressed in various ways, however. A compression algorithm stores either an exact representation or an approximation of the original image in a smaller number of bytes that can be expanded back to ...

7. The best digital photo frames of 2025 - AOL

   www.aol.com/lifestyle/best-digital-photo-frames...

   Size: The average photo frame measures about 10 inches diagonally, roughly the same as an entry-level iPad. I'd consider that the minimum size; anything smaller will make it hard to view photos ...