Table of Contents
- 1 How many bytes are needed to store an image of 640×480 pixels as I Black and White II grayscale and III 24-bit color?
- 2 What is the storage requirement for a 1024 * 1024 24-bit color image?
- 3 How many bytes is a color?
- 4 How many bytes are in a RGB pixel?
- 5 How do you calculate pixels bytes?
- 6 Why is 8bit 256 colors?
- 7 How is a bitmap stored?
- 8 How many bits does it take to store a 128×128 image?
- 9 How many bits per pixel does a bitmap store?
How many bytes are needed to store an image of 640×480 pixels as I Black and White II grayscale and III 24-bit color?
A 640 X 480 24-bit color image would require 921.6KB of storage. (Actually most 24-bit images are 32-bit images. The extra byte of data for each pixel is used to store an alpha channel value representing special effect information.)
What is the storage requirement for a 1024 * 1024 24-bit color image?
2,359,296 bytes
An image displayed or stored at 1024 by 768 and 24 bit color would require 2,359,296 bytes of storage.
How many bytes is a color?
3 bytes
A byte is a convenient chunk of computer memory, so one byte was devoted to representing the amount of a single primary color. Thus, it takes 3 bytes (24 bits) to represent a single spot of pure color. With 256 values for each primary, we have 256 x 256 x 256 = 16,777,216 colors.
What is 8bit gray level image?
8 bit color format is one of the most famous image format. It has 256 different shades of colors in it. It is commonly known as Grayscale image. The range of the colors in 8 bit vary from 0-255. This format was used initially by early models of the operating systems UNIX and the early color Macintoshes.
How big is a 640×480 picture?
8.9 x 6.7 inches
Each pixel is converted into a dot of color. An image with 640×480 resolution will be displayed on a monitor as 640/72=8.9 inches by 480/72=6.7 inches, or 8.9 x 6.7 inches in size. Therefore an image with 640×480 resolution is a good size image to view on a monitor, email to a friend or use on a website.
How many bytes are in a RGB pixel?
As each RGB pixel has three sets of 8-bit binary numbers it therefore has 24 bits of computer information in total. Hence the term ’24-bit colour’. And as 8 bits equals 1 byte, each RGB pixel therefore equals 3 bytes in file size.
How do you calculate pixels bytes?
Multiply the width and height of the image, in pixels, to get the total pixel count. 2. Multiply the total pixel count by 3 to get the image size in bytes.
Why is 8bit 256 colors?
It’s simple arithmetic. To calculate how many different colors can be captured or displayed, simply raise the number 2 to the power of the number of bits used to record or display the image. For example, 8-bits gives you 256 colors because 28=256.
How many bytes are in a .jpg image?
2.1- Bytes and File size
| File type | Size as # of pages, minutes, seconds, or dimensions | Size of file in Bytes, KB, MB, GB, etc. |
|---|---|---|
| page of plain text (.txt) | About 500 words, or 2500 characters | 2500 Bytes, 2.5KB |
| .jpg image | 1 imige | 10kb |
| animated .gif image | 30 frames | 8kb |
| .pdf file | 5 pages | 20kb |
How many Colours does bitmap have?
Thus, a pure black and white image (i.e. no greys) would be described as a 1-bit or 2-colour image, since every pixel is either black (0) or white (1). Common colour depths include 8-bit (256 colours) and 24-bit (16 million colours)….
| Bitmap Colour Depth | ||
|---|---|---|
| Prev | Graphics files and formats | Next |
How is a bitmap stored?
Bitmap (or raster) images are stored as a series of tiny dots called pixels. Each pixel is actually a very small square that is assigned a color, and then arranged in a pattern to form the image. That’s because a bitmap image has to store color information for each individual pixel that forms the image.
How many bits does it take to store a 128×128 image?
Therefore the number of bits required to store a digitized image of size N x N is b = N x N x m . 128 x 128 image with 256 gray levels (ie 8 bits/pixel) required a storage of ~ 17000 bytes. Did you find this is helpful?
How many bits per pixel does a bitmap store?
The following illustration shows a bitmap that stores colors directly (24 bits per pixel) rather than using a color table. The illustration also shows an enlarged view of the corresponding image. In the bitmap, FFFFFF represents white, FF0000 represents red, 00FF00 represents green, and 0000FF represents blue.
What are bitmaps used for in computer graphics?
In the majority of situations bitmaps are used to represent images on the computer. For example the following is a bitmap which has 397 pixels horizontally, 294 pixels vertically, and each pixel contains a grey value from a possible 256 different greys. Each pixel in a bitmap contains certain information, usually interpreted as colour information.
How to calculate the amount of disk storage required for bitmapping?
The amount of disk storage required for any bitmap is easy to calculate given the bitmap dimensions (N x M) and colour depth in bits (B). The formula for the file size in KBytes is where N and M are the number of horizontal and vertical pixels, B is the number of bits per pixel.