Comparing File Sizes of Image File Formats

Windows Tutorials - Herong's Tutorial Examples

∟JPEG Image File Format Quality and Size

∟Comparing File Sizes of Image File Formats

This section provides a quick comparison of file sizes of 3 image file formats, BMP, XCF and JPEG, of the same gradient spiral image.

Now we have a single image saved in 3 file formats. Let's compare them by their file sizes:

Open a command line window and go to the folder where those image files are saved:

C:\>cd \herong

C:\herong>dir

   62,262 GIMP_Red_Gradient_Spiral.bmp
   41,767 GIMP_Red_Gradient_Spiral.xcf
   10,914 GIMP_Red_Gradient_Spiral_100.jpg

File sizes tell us that:

BMP format with 24-bit colors: 62,262 bytes - The image data is about 144 x 144 x 24 bits = 497,664 bits = 62,208 bytes. So there is no compression in BMP format.
XCF format: 41,767 bytes - Comparing to the image data size, 62,208 bytes, XCF format has a 33% compression rate.
JPEG format with 100% quality level: 10,914 bytes - Comparing to the image data size, 62,208 bytes, JPEG format has a 82% compression rate.

Table of Contents

About This Book

Introduction to Microsoft Windows

Introduction to Windows Explorer

Introduction to Internet Explorer

"Paint" Program and Computer Graphics

GIMP - GNU Image Manipulation Program

►JPEG Image File Format Quality and Size

Saving Images in JPG/JPEG Format

Saving Images in BMP (Windows Bitmap) Format

►Comparing File Sizes of Image File Formats

Comparing JPEG High Quality Levels

Comparing JPEG Low Quality Levels

GIF Image File Format and Transparent Background

"WinZip" - ZIP File Compression Tool

"WinRAR" - RAR and ZIP File Compression Tool

FTP Server, Client and Commands

"FileZilla" - Free FTP Client and Server

Web Server Log Files and Analysis Tool - "Analog"

Spyware Adware Detection and Removal

IE Addon Program Listing and Removal

Vundo (VirtuMonde/VirtuMundo) - vtsts.dll Removal

Trojan and Malware "Puper" Description and Removal

VSToolbar (VSAdd-in.dll) - Description and Removal

Spybot - Spyware Blocker, Detection and Removal

Setting Up and Using Crossover Cable Network

Home Network Gateway - DSL Modem/Wireless Router

Windows Task Manager - The System Performance Tool

"tasklist" Command Line Tool to List Process Information

"msconfig" - System Configuration Tool

Configuring and Managing System Services

Windows Registry Key and Value Management Tools

Startup Programs Removal for Better System Performance

Winsock - Windows Sockets API

Java on Windows

Glossary of Terms

Outdated Tutorials

Full Version in PDF/ePUB