This chapter is from the book
- The term resolution refers to the number of pixels that describe an image and establish its detail. The three different types are image resolution, monitor resolution—both
of which are measured in pixels per inch (ppi)—and printer or output resolution,
measured in ink dots per inch (dpi).
- You can use the Crop tool to trim, scale, and straighten an
- You can use the black, white, and gray triangles below the
Levels command histogram to control the midpoint and where the
darkest and lightest points in the image begin, thus extending
its tonal range.
- Saturation is the strength or purity of color in an image.
You can use the Sponge tool to increase the saturation in a specific
area of an image.
- The Unsharp Mask filter adjusts the contrast of the edge detail
and creates the illusion of a more focused image.