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2. Wratten number - Wikipedia

   en.wikipedia.org/wiki/Wratten_number

   Increase contrast of yellow objects A 25 Increase contrast of brown objects B2 58 Increase contrast of red objects; commonly known as B C5 47 Photograph blue as white; replaces C4 (#49) with a comparable filter factor as updated A and B2 F 29 Blueprints; photograph red as white Three-color separation A 25

3. Histogram equalization - Wikipedia

   en.wikipedia.org/wiki/Histogram_equalization

   This method usually increases the global contrast of many images, especially when the image is represented by a narrow range of intensity values. Through this adjustment, the intensities can be better distributed on the histogram utilizing the full range of intensities evenly. This allows for areas of lower local contrast to gain a higher contrast.

4. Staining - Wikipedia

   en.wikipedia.org/wiki/Staining

   Staining is a technique used to enhance contrast in samples, generally at the microscopic level. Stains and dyes are frequently used in histology (microscopic study of biological tissues ), in cytology (microscopic study of cells ), and in the medical fields of histopathology , hematology , and cytopathology that focus on the study and ...

5. Normalization (image processing) - Wikipedia

   en.wikipedia.org/wiki/Normalization_(image...

   The basic intent of the contrast enhancement technique is to adjust the local contrast in the image so as to bring out the clear regions or objects in the image . Low-contrast images often result from poor or non-uniform lighting conditions, a limited dynamic range of the imaging sensor, or improper settings of the lens aperture.

6. Contrast (vision) - Wikipedia

   en.wikipedia.org/wiki/Contrast_(vision)

   Contrast sensitivity is typically expressed as the reciprocal of the threshold contrast for detection of a given pattern (i.e., 1 ÷ contrast threshold). [15] Using the results of a contrast sensitivity exam, a contrast sensitivity curve can be plotted, with spatial frequency on the horizontal, and contrast threshold on the vertical axis.

7. Customize your Inbox theme, font size and layout in AOL Mail

   help.aol.com/articles/customize-your-inbox-theme...

   Do you want to adjust the default font size used in your AOL Mail inbox? If the font size in your messages list and emails is causing readability issues, changing it may help. To increase the font size: 1. Click the Settings Icon. 2. Toggle on Enable large text size to increase text size.