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Highline College Library - the building is closed until further notice, but staff are working remotely to support you. No services after 5pm on Wednesday, Nov. 25, through Saturday, Nov. 28, during Thanksgiving week. See our Updates and Resources page >

Visual Literacy: Image Anatomy

This guide will help you to find, read, cite, edit and present images.

What is Metadata?

Metadata is data about data!

Metadata describes a digital image file. It is similar to bibliographic data for books and articles, or food labels, map legends and data on DVDs.

Basically, it describes the Who, What, Where, Why and How of data.

Metadata can be easily manipulated so you might find different (inaccurate?) metadata the same image.

Finding Metadata

1. Right click on the image.

2. Choose View Image Info, Properties or Get Info.

This is what is shown when you right click on the Google image:

Anatomy of an Image

From: Wikipedia; under Fair Use

 Knowing a few technical things about an image - file size, resolution, format, etc., will make it easier to work with digital images.

Pixel

Pixel is short for "Picture Element,"

A pixel is a tiny individual element that makes up a digital image.

Pixel Portrait by Kevin Dean (CC BY-SA 2.0)

Resolution

Resolution

Resolution is a measure of sharpness in a digital picture and is usually measured by the number of pixels or dots per inch; for example, "a resolution of 1200 dots per inch"

Higher Resolution:

 

Medium Resolution

 

Lower Resolution

Funny by dr_XeNo (CC BY 2.0)

 

Ask a Librarian

Ask a Librarian!

We're here to help with library and research questions! 

Highline College librarians are available to help you via Chat and Email during the following hours during the campus closure:

Thanksgiving Week:
Monday, Tuesday (11/23-24): 9am-7pm
Wednesday (11/25): 9am-5pm
Thursday, Friday, Saturday (11/26-28): closed/no services
Sunday (11/29): 11am-7pm

Fall Quarter
Monday - Thursday: 9am-7pm
Friday: 9am-5pm
Sunday: 11am-7pm

If you need help from a librarian when a Highline Librarian isn't available, use the 24/7 chat service.

Email us at refhelp@highline.edu.

File Size

File Size is the amount of space an image takes up. It is usually measured in bytes, kilobytes (1000 bytes), megabytes (1000 kilobytes), gigabytes (1000 megabytes), etc.

File Format

File Format - standardized means of storing and viewing images on computers.  Each format uses a different compression scheme.

Compression

Compression is the reduction of a file's size by changing its format.

Low Compression:

More Compression:

Highly Compressed:

Sealion by Todd Ryburn (CC BY 2.0)