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What You Need to Know About Image Formats and When to Use Them

What You Need to Know About Image Formats and When to Use Them

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🇻🇳 Đọc bằng tiếng Việt

 

Have you ever wondered what all these image formats are for and what they do?
What You Need to Know About Image Formats and When to Use Them
JPEG, GIF, TIFF, PNG, BMP are the 5 main data file formats for storing images
Depending on our needs, we can choose different image formats to suit them. Choosing the wrong image format for the purpose can waste storage, or lose image data and reduce image quality. For example, JPEG is the most commonly used format. But for long-term use, this format is quite bad for archiving material for the long term

 

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1. JPEG – The Small, Light Format 
 
JPEG (Joint Photographic Experts Group), also called JPG, is an image format that was introduced in 1992
Pros:
Small and light: when compressed, its size is only 1/10 of the original image data, which makes it suitable for sending images by email, and when posted on the web, it saves resources and improves your page load speed..etc….
Cons:
The price for that small size is: pixel image data is reduced, the image has duller colors than the original file, image data is lost…etc…

=> JPEG is not an image format for long-term storage, but it is the most suitable image format for those who build websites: it uses few resources, loads fast, and to the naked eye the colors look nearly the same as the original image

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2. PNG – Beautiful and True to Life:
PNG (Portable Network Graphics), introduced in 1996, is a format that supports image compression without reducing data or image quality, similar to TIFF. PNG is suitable for long-term storage, but its image quality is superior to TIFF
There are 2 PNG formats: PNG-8 and PNG-24
PNG-8 

  • It is equivalent to the GIF image format
  • Supports 256 colors and 1-bit transparency
  • PNG-8 is smaller in size than GIF

PNG-24

  • PNG-24 has 24-bit color like JPEG
  • Contains more than 26 million colors
  • Compressed with the Lossless standard, so PNG files are much larger than JPEG

Pros: 

  • Compressed with the Lossless standard, so image quality is preserved
  • Images have no jagged edges
  • Suitable for simple images such as text
  • PNG works well on the web for flat color areas and for designing logos and images with transparent or semi-transparent backgrounds
  • A PNG can be placed on top of another image and still show on top
  • Suitable for posting images on Facebook
Cons:
  • The price for original quality is a file size many times larger than JPEG
  • Uses more resources, and loads slower than JPEG when uploaded to the web

=> PNG is the compression format for the best-quality images, suitable for photographers and designers

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3. GIF – Maximum Simplicity:
GIF (Graphic Interface Format), introduced in 1987, is a format widely used in graphics and the digital image world, but GIF is not suitable for storing images. GIF has only 256 colors, so it does not produce true-to-life images
 
Pros
  • Because it has few colors, its file size is much smaller than JPEG
  • GIF is simple and automatically recognized by web browsers. It works by creating a series of GIF frames and then combining them to make an animated image.
  • Suitable for images and websites with few colors, and for small icons and logos with few colors
  • Small image size

Cons

  • GIF is not suitable for storing images for later
  • GIF has few colors

 

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4. TIFF – Consistent From Start to Finish:
TIFF (Tagged Image Format File), introduced in 1986, is an image format that does not lose data when compressing and saving files. TIFF is a high-quality image format suitable for photo printing and scanning
Pros

  • Can be viewed and edited
  • Good image quality; often used to save images with complex colors, and often used for scanning
  • TIFF works well for printing images that are being edited and need layers, and for high-quality images.
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5. BMP 
Introduced in 1994, BMP is a raster graphics image file format used to store bitmap digital images. It is independent of display devices such as the graphics adapter, especially on Microsoft Windows and the OS/2 operating system.
Pros
  • BMP does not support image compression well
  • Easy to create from pixel data stored in computer memory
  • BMP is easily translated into a dot format for output devices such as CRT monitors and printers
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Comparison Table of Image Formats
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JPEG: Suitable for images on websites
GIF: Suitable for web images, animated images, and clip ART.
PNG: Suitable for web images, logo design & Line ART.
TIFF: Suitable for printing.
BMP: Suitable for printing.

Which Image Format Should You Choose?
Which image format to choose depends on how you plan to store and use the image. For long-term archiving, you should use TIFF, and PNG is the number 1 choice. On the other hand, you should not use these images for the web, as they can slow down your site’s load speed a lot. So for online use, JPEG is a good choice, even though JPEG does not guarantee image quality. The best way to choose an image file format is to use these formats flexibly: – Save the master copy of the image file in TIFF or PNG format in an original folder. – When you need it for online purposes such as uploading to a website… tasks that require a compact, compressed image file, copy the original image file, save it converted to JPEG, and work on that copy. Combining image file formats flexibly like this makes sharing or using images on the internet quick and easy, while keeping your image archive safe with guaranteed high quality for your original photo library.

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Hoang Ngoc Quang Anh

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