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The 11 Best Image Search Engines

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The 11 Best Image Search Engines

These days, image search engines are more advanced than ever.

No matter what kind of image you want to find, chances are, with the right keywords, search filters, and tools, you’ll find it.

That’s not all, though.

Need to find a source for an image? Do a reverse image search.

Want a high-res image to use in your next marketing campaign or on your website?

Use advanced image search filters to find images with the correct usage rights.

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Even if you just want a big, beautiful photo to use as your desktop wallpaper, there’s an image search engine for that, too.

Here are the best ones for picture search, in no particular order.

1. TinEye Reverse Image Search Engine

TinEye is a reverse image search engine that helps you source images and finds where they appear on the web.

This tool lets you search by both URLs and uploaded images.

Just click the arrow icon in front of the search box and upload any image from your computer to find where it appears online.

There’s also a TinEye Chrome extension for faster reverse image searches. It allows you to right-click on any image and search for it using TinEye’s technology.

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The 11 Best Image Search Engines

2. Google Images

You can’t beat Google Images for basic image searches. Just enter a keyword and go.

For more in-depth searching, there are lots of filters, too.

For example, when I search for “bluebird”, I can narrow down photos to just cartoons, clipart drawings, and illustrations, or even logo designs.

The 11 Best Image Search Engines

To go even further, clicking “Tools” gives you access to more filters: size, color, usage rights, type of photo, and when it was uploaded/created.

This is super-handy for finding exactly the kind of image you want, as well as images that are royalty-free.

The 11 Best Image Search Engines

Google Reverse Image Search

Google Images also offers a reverse image search tool. To access it, click on the camera icon in the search box.

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The 11 Best Image Search Engines

3. Yahoo Image Search

Another option for image search engines is Yahoo Image Search.

This tool looks similar to Google Images, but the results are slightly different.

You’ll also notice the filtering tools aren’t hidden, but easy to access.

The 11 Best Image Search Engines

4. Bing Image Search

Want an alternative to Google?

The layout and features in Bing Image Search are still pretty close to Google, though, and you’ll see similar results:

The 11 Best Image Search Engines

One interesting feature is the People filter, which lets you choose photos of people according to how they were photographed (just faces or head & shoulders).

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The 11 Best Image Search Engines

Pretty useful, right?

The 11 Best Image Search Engines

5. Pinterest Visual Search Tool

Did you know Pinterest has its own visual search tool? It makes sense since it’s an image-based platform.

It’s pretty simple to use:

  • Log into your Pinterest account.
  • Click on any pin in your home feed (or on any profile or board).
  • Click the icon in the bottom-right corner of the pinned image.

The 11 Best Image Search Engines

The tool will return visually similar results to the image you searched.

Pinterest has quite a large database of images thanks to user-created pins, so this is a source you shouldn’t rule out when you need to find a particular image.

The 11 Best Image Search Engines

6. Picsearch

Looking for an image search engine with more varied results? Try Picsearch.

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The 11 Best Image Search EnginesThe 11 Best Image Search Engines

You won’t get results as specific as what you’ll find in Google, Bing, or Yahoo, but if you don’t need that, this could be a good tool for finding interesting photos that broadly match your keyword.

There’s also a nice feature in the Advanced Search option that lets you filter images by size, including wallpaper-size.

The 11 Best Image Search Engines

7. Flickr

Flickr is a different kind of image search engine because the pool of images comes from amateur and professional photographers sharing their work on the platform.

The 11 Best Image Search Engines

If you enjoy browsing and searching for beautiful photos, this is your spot.

If you’re looking for photos to use in commercial or marketing projects, make sure you filter your searches by the correct usage license.

The 11 Best Image Search Engines
The 11 Best Image Search Engines

8. Getty Images

For beautiful stock photos, check Getty Images.

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The 11 Best Image Search Engines

You can search by keyword or search by image – just click the camera icon in the search box.

If you search by keyword, the auto-suggest feature has some helpful options to narrow down your search.

The 11 Best Image Search Engines

Getty Images has an incredible array of search filters, too, so there’s no way you won’t find the exact type of image you’re looking for.

The 11 Best Image Search Engines

Keep in mind: You’ll have to pay for a royalty-free license for whatever photo you want to use. Getty Images offers this licensing on an image-by-image basis, or you can purchase packs of photos for a flat price.

9. Shutterstock

Another, cheaper image search engine for royalty-free stock photos is Shutterstock.

Their image library is just as large as Getty Images, and their search filters just as in-depth.

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The 11 Best Image Search Engines

Shutterstock offers pre-paid image packs as well as annual plans. Their most popular includes 350 image downloads/month for $199/month.

Another good option for marketers on a budget: get a pack of any 5 royalty-free images for $49.

10. The New York Public Library Digital Collections

Looking for high-quality digital images, including high-res scans of historical books, maps, papers, sketchbooks, ledgers, photographs, and more?

The 11 Best Image Search EnginesThe 11 Best Image Search Engines

The NYPL Digital Collections has a vast archive of images in the public domain, which means you can use and reuse the images any way you like.

It’s a great image search engine for finding unique photos.

Once you start searching, it’s fun to explore the different digitized items.

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For example, this search led me to an illustrated page from a book on New York fauna.

The 11 Best Image Search EnginesThe 11 Best Image Search EnginesThe 11 Best Image Search Engines

Quite simply, these are images you won’t find anywhere else.

11. Yandex Image Search & Similar Images

Russian search engine Yandex offers a few different ways to find and browse images.

At Yandex.Images, you can explore collections of images by topic.

Clicking through takes you to a robust image search where you can filter and sort by size, orientation, image type, file format, and more.

Yandex image search

Similar Images is another Yandex image tool that helps you find items similar to your existing one—for example, products with like features.

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And its regular Image Search is actually a reverse search that needs only a fragment of an image to scan for it on the web. Of course, if you have the full image that’s even better.

Image Search Engines Are Bursting With Potential

Overall, image search engines are better than ever. Don’t settle for just one – use the tool that best suits your needs.

Make sure you play around with keywords and search filters to find those hidden gems.

Furthermore, dare to stray from the confines of Google. You never know what you’ll find – you just might be pleasantly surprised.


Image Credits

All screenshots taken by SEJ Editor, February 2021

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How Compression Can Be Used To Detect Low Quality Pages

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Compression can be used by search engines to detect low-quality pages. Although not widely known, it's useful foundational knowledge for SEO.

The concept of Compressibility as a quality signal is not widely known, but SEOs should be aware of it. Search engines can use web page compressibility to identify duplicate pages, doorway pages with similar content, and pages with repetitive keywords, making it useful knowledge for SEO.

Although the following research paper demonstrates a successful use of on-page features for detecting spam, the deliberate lack of transparency by search engines makes it difficult to say with certainty if search engines are applying this or similar techniques.

What Is Compressibility?

In computing, compressibility refers to how much a file (data) can be reduced in size while retaining essential information, typically to maximize storage space or to allow more data to be transmitted over the Internet.

TL/DR Of Compression

Compression replaces repeated words and phrases with shorter references, reducing the file size by significant margins. Search engines typically compress indexed web pages to maximize storage space, reduce bandwidth, and improve retrieval speed, among other reasons.

This is a simplified explanation of how compression works:

  • Identify Patterns:
    A compression algorithm scans the text to find repeated words, patterns and phrases
  • Shorter Codes Take Up Less Space:
    The codes and symbols use less storage space then the original words and phrases, which results in a smaller file size.
  • Shorter References Use Less Bits:
    The “code” that essentially symbolizes the replaced words and phrases uses less data than the originals.

A bonus effect of using compression is that it can also be used to identify duplicate pages, doorway pages with similar content, and pages with repetitive keywords.

Research Paper About Detecting Spam

This research paper is significant because it was authored by distinguished computer scientists known for breakthroughs in AI, distributed computing, information retrieval, and other fields.

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Marc Najork

One of the co-authors of the research paper is Marc Najork, a prominent research scientist who currently holds the title of Distinguished Research Scientist at Google DeepMind. He’s a co-author of the papers for TW-BERT, has contributed research for increasing the accuracy of using implicit user feedback like clicks, and worked on creating improved AI-based information retrieval (DSI++: Updating Transformer Memory with New Documents), among many other major breakthroughs in information retrieval.

Dennis Fetterly

Another of the co-authors is Dennis Fetterly, currently a software engineer at Google. He is listed as a co-inventor in a patent for a ranking algorithm that uses links, and is known for his research in distributed computing and information retrieval.

Those are just two of the distinguished researchers listed as co-authors of the 2006 Microsoft research paper about identifying spam through on-page content features. Among the several on-page content features the research paper analyzes is compressibility, which they discovered can be used as a classifier for indicating that a web page is spammy.

Detecting Spam Web Pages Through Content Analysis

Although the research paper was authored in 2006, its findings remain relevant to today.

Then, as now, people attempted to rank hundreds or thousands of location-based web pages that were essentially duplicate content aside from city, region, or state names. Then, as now, SEOs often created web pages for search engines by excessively repeating keywords within titles, meta descriptions, headings, internal anchor text, and within the content to improve rankings.

Section 4.6 of the research paper explains:

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“Some search engines give higher weight to pages containing the query keywords several times. For example, for a given query term, a page that contains it ten times may be higher ranked than a page that contains it only once. To take advantage of such engines, some spam pages replicate their content several times in an attempt to rank higher.”

The research paper explains that search engines compress web pages and use the compressed version to reference the original web page. They note that excessive amounts of redundant words results in a higher level of compressibility. So they set about testing if there’s a correlation between a high level of compressibility and spam.

They write:

“Our approach in this section to locating redundant content within a page is to compress the page; to save space and disk time, search engines often compress web pages after indexing them, but before adding them to a page cache.

…We measure the redundancy of web pages by the compression ratio, the size of the uncompressed page divided by the size of the compressed page. We used GZIP …to compress pages, a fast and effective compression algorithm.”

High Compressibility Correlates To Spam

The results of the research showed that web pages with at least a compression ratio of 4.0 tended to be low quality web pages, spam. However, the highest rates of compressibility became less consistent because there were fewer data points, making it harder to interpret.

Figure 9: Prevalence of spam relative to compressibility of page.

The researchers concluded:

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“70% of all sampled pages with a compression ratio of at least 4.0 were judged to be spam.”

But they also discovered that using the compression ratio by itself still resulted in false positives, where non-spam pages were incorrectly identified as spam:

“The compression ratio heuristic described in Section 4.6 fared best, correctly identifying 660 (27.9%) of the spam pages in our collection, while misidentifying 2, 068 (12.0%) of all judged pages.

Using all of the aforementioned features, the classification accuracy after the ten-fold cross validation process is encouraging:

95.4% of our judged pages were classified correctly, while 4.6% were classified incorrectly.

More specifically, for the spam class 1, 940 out of the 2, 364 pages, were classified correctly. For the non-spam class, 14, 440 out of the 14,804 pages were classified correctly. Consequently, 788 pages were classified incorrectly.”

The next section describes an interesting discovery about how to increase the accuracy of using on-page signals for identifying spam.

Insight Into Quality Rankings

The research paper examined multiple on-page signals, including compressibility. They discovered that each individual signal (classifier) was able to find some spam but that relying on any one signal on its own resulted in flagging non-spam pages for spam, which are commonly referred to as false positive.

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The researchers made an important discovery that everyone interested in SEO should know, which is that using multiple classifiers increased the accuracy of detecting spam and decreased the likelihood of false positives. Just as important, the compressibility signal only identifies one kind of spam but not the full range of spam.

The takeaway is that compressibility is a good way to identify one kind of spam but there are other kinds of spam that aren’t caught with this one signal. Other kinds of spam were not caught with the compressibility signal.

This is the part that every SEO and publisher should be aware of:

“In the previous section, we presented a number of heuristics for assaying spam web pages. That is, we measured several characteristics of web pages, and found ranges of those characteristics which correlated with a page being spam. Nevertheless, when used individually, no technique uncovers most of the spam in our data set without flagging many non-spam pages as spam.

For example, considering the compression ratio heuristic described in Section 4.6, one of our most promising methods, the average probability of spam for ratios of 4.2 and higher is 72%. But only about 1.5% of all pages fall in this range. This number is far below the 13.8% of spam pages that we identified in our data set.”

So, even though compressibility was one of the better signals for identifying spam, it still was unable to uncover the full range of spam within the dataset the researchers used to test the signals.

Combining Multiple Signals

The above results indicated that individual signals of low quality are less accurate. So they tested using multiple signals. What they discovered was that combining multiple on-page signals for detecting spam resulted in a better accuracy rate with less pages misclassified as spam.

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The researchers explained that they tested the use of multiple signals:

“One way of combining our heuristic methods is to view the spam detection problem as a classification problem. In this case, we want to create a classification model (or classifier) which, given a web page, will use the page’s features jointly in order to (correctly, we hope) classify it in one of two classes: spam and non-spam.”

These are their conclusions about using multiple signals:

“We have studied various aspects of content-based spam on the web using a real-world data set from the MSNSearch crawler. We have presented a number of heuristic methods for detecting content based spam. Some of our spam detection methods are more effective than others, however when used in isolation our methods may not identify all of the spam pages. For this reason, we combined our spam-detection methods to create a highly accurate C4.5 classifier. Our classifier can correctly identify 86.2% of all spam pages, while flagging very few legitimate pages as spam.”

Key Insight:

Misidentifying “very few legitimate pages as spam” was a significant breakthrough. The important insight that everyone involved with SEO should take away from this is that one signal by itself can result in false positives. Using multiple signals increases the accuracy.

What this means is that SEO tests of isolated ranking or quality signals will not yield reliable results that can be trusted for making strategy or business decisions.

Takeaways

We don’t know for certain if compressibility is used at the search engines but it’s an easy to use signal that combined with others could be used to catch simple kinds of spam like thousands of city name doorway pages with similar content. Yet even if the search engines don’t use this signal, it does show how easy it is to catch that kind of search engine manipulation and that it’s something search engines are well able to handle today.

Here are the key points of this article to keep in mind:

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  • Doorway pages with duplicate content is easy to catch because they compress at a higher ratio than normal web pages.
  • Groups of web pages with a compression ratio above 4.0 were predominantly spam.
  • Negative quality signals used by themselves to catch spam can lead to false positives.
  • In this particular test, they discovered that on-page negative quality signals only catch specific types of spam.
  • When used alone, the compressibility signal only catches redundancy-type spam, fails to detect other forms of spam, and leads to false positives.
  • Combing quality signals improves spam detection accuracy and reduces false positives.
  • Search engines today have a higher accuracy of spam detection with the use of AI like Spam Brain.

Read the research paper, which is linked from the Google Scholar page of Marc Najork:

Detecting spam web pages through content analysis

Featured Image by Shutterstock/pathdoc

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New Google Trends SEO Documentation

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Google publishes new documentation for how to use Google Trends for search marketing

Google Search Central published new documentation on Google Trends, explaining how to use it for search marketing. This guide serves as an easy to understand introduction for newcomers and a helpful refresher for experienced search marketers and publishers.

The new guide has six sections:

  1. About Google Trends
  2. Tutorial on monitoring trends
  3. How to do keyword research with the tool
  4. How to prioritize content with Trends data
  5. How to use Google Trends for competitor research
  6. How to use Google Trends for analyzing brand awareness and sentiment

The section about monitoring trends advises there are two kinds of rising trends, general and specific trends, which can be useful for developing content to publish on a site.

Using the Explore tool, you can leave the search box empty and view the current rising trends worldwide or use a drop down menu to focus on trends in a specific country. Users can further filter rising trends by time periods, categories and the type of search. The results show rising trends by topic and by keywords.

To search for specific trends users just need to enter the specific queries and then filter them by country, time, categories and type of search.

The section called Content Calendar describes how to use Google Trends to understand which content topics to prioritize.

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Google explains:

“Google Trends can be helpful not only to get ideas on what to write, but also to prioritize when to publish it. To help you better prioritize which topics to focus on, try to find seasonal trends in the data. With that information, you can plan ahead to have high quality content available on your site a little before people are searching for it, so that when they do, your content is ready for them.”

Read the new Google Trends documentation:

Get started with Google Trends

Featured Image by Shutterstock/Luis Molinero

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All the best things about Ahrefs Evolve 2024

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All the best things about Ahrefs Evolve 2024

Hey all, I’m Rebekah and I am your Chosen One to “do a blog post for Ahrefs Evolve 2024”.

What does that entail exactly? I don’t know. In fact, Sam Oh asked me yesterday what the title of this post would be. “Is it like…Ahrefs Evolve 2024: Recap of day 1 and day 2…?” 

Even as I nodded, I couldn’t get over how absolutely boring that sounded. So I’m going to do THIS instead: a curation of all the best things YOU loved about Ahrefs’ first conference, lifted directly from X.

Let’s go!

OUR HUGE SCREEN

CONFERENCE VENUE ITSELF

It was recently named the best new skyscraper in the world, by the way.

 

OUR AMAZING SPEAKER LINEUP – SUPER INFORMATIVE, USEFUL TALKS!

 

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GREAT MUSIC

 

AMAZING GOODIES

 

SELFIE BATTLE

Some background: Tim and Sam have a challenge going on to see who can take the most number of selfies with all of you. Last I heard, Sam was winning – but there is room for a comeback yet!

 

THAT BELL

Everybody’s just waiting for this one.

 

STICKER WALL

AND, OF COURSE…ALL OF YOU!

 

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There’s a TON more content on LinkedIn – click here – but I have limited time to get this post up and can’t quite figure out how to embed LinkedIn posts so…let’s stop here for now. I’ll keep updating as we go along!



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