Contrast — adjusts the difference between black and white, thereby making an image sharper or softer. The difference between black and white is small with a low contrast setting so the image is softer. With a
Threshold — controls the level at which a pixel is considered black or white (1 bit/pixel). A low threshold value produces a lighter image, and can be used to subdue backgrounds and subtle, unneeded information. A high threshold value produces a darker image, and can be used to help pick up light information. Threshold values range from 0 to 255. The default is 90.
Threshold: 50 | Threshold: 127 |
Filters - Noise
•Lone Pixel: reduces random noise on black and white images by converting a single black pixel surrounded by white to white or by converting a single white pixel surrounded by black to black.
•Majority Rule: sets the central pixel value in a matrix according to the majority of white or black pixels in a matrix.
No Noise Filter Used | Lone Pixel |
| 53 |
