What is jpeg

JPEG is a lossy compression method used to ensure the digital images being used are as small as possible and load quickly when someone wants to view them. It is important. Usually, images for the web design should not be pretty small, as 100KB. That is why jpeg (jpg) is an excellent choice.

JPEG is also the name of the organization Joint Photographic Experts Group, which is the name of the committee that helped creating the JPEG standard, as well as other picture coding standards under the broader group called ISO-International Organization for Standardization. The first JPEG standard was issued in 1992.

Jpeg is also a file format. Here are some facts about the .jpeg file format which web designers should know, even they are amateur bloggers.

• Most common image file format used by digital cameras and other image capturing devices.
• Supports 16,777,216 colors (8 bits / RGB).
• Can display more than 16 million colors at once, making the color scheme and contrast resolution perfect.
• Supports a size of 65,535 x 65,535 pixels.
• Reduces the size of an image by about 50-75% (because of lousy compression) when saved.
• Lastly, this type of file format is not ideal for images with sharp edges because the colors blend more than if it were saved as a .png, which display individual pixels as a combination

What Is JPG?

When it comes to .jpeg vs .jpg, the truth is there is no difference between the two except the number of characters. The term JPG exists because the earlier versions of Windows operating systems had a 3-letter limit for file’s extension. Nowadays, operating systems accept 3- or 4-letter file extensions such as .jpeg or .jpg, but many web designers have been used to saving their images as JPGs.

Raster images

• Best used for non-lined images.
• They have subtle hue or shade gradations and very undefined lines and shapes.
• Due to their pixel-based nature, they suffer quality issues when blown up in size.
• They are defined and displayed at one specific resolution, which is measured in dots per inch (dpi). The higher the dpi, the better the resolution and visual appeal of the image.
• Common raster file formats include TIFF, JPEG, GIF, PCX and BMP files.
• Raster images are the Web standard, meaning they are preferred for all images found on the internet

Raster image diagram taken from Researchgate

Choosing the best format for your blog – a practical diagram for web designers

Summary

Picking the file format for your blog is only the first step in image optimization – the second is optimal file size and SEO keywords in image name and alt text for accessibility. Tips on optimizing images for the web with SEO in focus you can find in Kinsta, Shopify, or Jimdo’s guides. See also Delante guide.

Based on: https://kinsta.com/blog/jpg-vs-jpeg/, https://www.designpowers.com/blog/image-file-formats

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