Image Searching: Google Image

Google Image is one of the easiest to use image search engines.  One advantage is that most people are already familiar with using Google.  So even if you never searched the image part of Google, you should be comfortable using it.

Another advantage is the advanced options in Google Image.  It is easy to control what images your search for.  You can limit the size, the ratio (vertical versus horizontal), colors, image type and usage rights.  If you forget to limit before you search, you can also limit afterwards.

While Google Image is a great tool, keep in mind that it is not perfect.  First, it pulls from various web pages.  While *most* of the images you find will be what you are looking for, there will be some irrelevant ones that sneak in.  In some cases, it may pull pornographic images, even with filters on.  However, how often this happens does seem to depend on what you're searching for.  The more common the search term (e.g. "dog" or "horse"), the less likely to get something irrelevant.

Another problem with Google is the usage rights.  You can limit to specific usage rights (i.e. images that you can use) from the advanced search; however, you cannot limit after you perform a search.  Another problem is that the usage rights are imperfect.  Even is an image is returned as "available for commercial use" or "labeled for reuse," make sure you double-check the original site.  There are several blogs and web pages that make use of images that are not theirs.

Basic searching in Google Image is pretty straight forward.  Simply type your search term(s) in the box and hit enter.

After you search, you can either browse through your results or limit your results by using the "Tools" button at the top of the search results.  This will open up a new tool bar that will let you limit by size, color, usage rights, type, and time frame. There will also be a link to the Advanced Search which will give you even more options.

Hint: While Google can handle "natural language" searching (i.e. writing a sentence), it works best if you just use keywords.  Another useful hint is to put phrases inside quotation marks.  This tells Google to ONLY return results that exactly match your terms.  It is very useful for looking up names. 

For example:
April Sheppard                Over 1 million images
"April Sheppard"              800 images

 
Finally if you're having trouble doing complex searches, try switching to advanced search or making use of Boolean connectors.  Boolean is a great way to control your searches.

If the "Tools" button doesn't have enough limits for you, click on the "Advanced Search" link:

If you know that you need the Advanced Search before you search, you can click on "Settings" in the bottom toolbar and select "Advanced Search" from there:

The top part of the search page acts as your Boolean search.  This allows you to search alternative words or omit others. 

The bottom part of the search page are your limiters:

You can limit by:

To do a reverse image search in Google Image, click on the small camera icon in the search bar.  This will give the option to upload an image or enter an URL of an image already on the web.

 
After you enter an image, Google will either tell you what the image is or show you similar looking images or videos. There is often a "Related Search" link to help you search for visually similar images and a "Find Image Source" button that will find webpages that feature the image you just uploaded.  For example: