After the recent updates of Google 21 Panda and Google PR; an up-to-the-minute news is coming from the webmaster gurus about the Google image search result update. As always, Google has not stated any explicit declaration about this search update but the sudden large amount of changes in the image search results efficiently sounds the proof.
Around November 15th and November 16th 2012; a large number of SEO (Search Engine Optimization) professionals experienced a solemn modification in the Google image search indexing results (Image ranking is hard to check, as many professionals do not track the traffic). A group of webmasters argued that this change is an issue because they were loosing their ranking for their popular keywords while the others declared this as an update by the Google to provide better image search results.
So if you are also experiencing some ups and downs in the image search results for your selected keywords, then this could be the result of this most recent Google image search ranking update.
After a lot of research related to the image search ranking algorithm on Google; we listed down the prime factors that affects the ranking. This may not lead to 100% result but it still counts a lot of importance.
Factor 1: The ALT tag text of the picture is the prime factor that affects the ranking of images.
Factor 2: The Title tags play a vital role in Google crawling.
Factor 3: The ranking of the page, which boast the picture is also very important factor in Google image search results.
Factor 4: The Filename of the picture used on the webpage also affect the search results considerably.
Factor 5: When you are using the pictures in a blog (HTML page) then the closeness of the search text after the picture sharply affects the Google image result for that picture.