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An image created assuming that there are 100 pixels per inch will look tiny on a 400 PPI display. A one-pixel-wide line looks good at 100 PPI, but at 400 PPI, a one-pixel-wide line is probably too thin. In fact, in many graphics systems, "pixel" doesn't really refer to the size of a physical pixel.
Types of Digital Images. The images types we will consider are: 1) binary, 2) gray-scale, 3) color, and 4) multispectral. 1. Binary images are the simplest type of images and can take on two values, typically black and white, or 0 and 1. A binary image is referred to as a 1-bit image because it takes only 1 binary digit to represent each pixel.
For example, a scale of 1:100,000 (one to one hundred thousand) means 1 centimeter on the map equals 100,000 centimeters (1km) on the ground. The following is a list of scales and equivalent ground distances for three distances measured on an image. Image scale. 1 mm on image.
If you had a map with a scale of 1:100,000, an object of 1cm length on the map would actually be an object 100,000cm (1km) long on the ground. Maps or images with small "map-to-ground ratios" are referred to as small scale (e.g. 1:100,000), and those with larger ratios (e.g. 1:5,000) are called large scale.
1 sty 2014 · Since humans are more sensitive to R and G than to B, we could shrink the R range and G range 0 .. 255 into the 3-bit range 0 .. 7 and shrink the B range down to the 2-bit range 0 .. 3, making a total of 8 bits.
Pixels are the basic building blocks of a digital image. A pixel is what we call the color or light values that occupy a specific place in an image. Think of an image as a big grid, with each square in the grid containing one color or pixel. This grid is sometimes called a bitmap.
Quiz yourself with questions and answers for Photoshop G-Metrix Exam Study Guide Lesson 1-2 (Digital Image Terms and Basic Design Principles), so you can be ready for test day. Explore quizzes and practice tests created by teachers and students or create one from your course material.
