Tag Archives: Exalead

Exalead, Search Engines, Search Strategies

Exalead changes filetype commands

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If you are a user of Exalead (http://www.exalead.com/search/) and use the filetype command you will need to make note of some changes to the file extensions. If you are looking for Excel spreadsheets you will now have to include ‘filetype:excel’ in your search strategy, for PowerPoint it is ‘filetype:powerpoint’ and for Word documents type in ‘filetype:word’. I assume that the changes are to ensure that the ‘new’ Microsoft Office 2007 extensions pptx, docx and xlsx are picked up. Alternatively, you could run just a keyword search and select the filetype from the menu down the right hand side of the results page.

In Google you have to run separate command line searches if you want to pick up both ppt and pptx files. The advanced search screen file format drop-down menu options only search for pre Microsoft Office 2007 file extensions. Bing does not seem to recognise the newer file extensions at all but you can search for them in Yahoo using the ‘originurlextension:’ command. Like Google, Yahoo’s advanced search screen file format box does not pick up the 2007 extensions.

Most people who use Microsoft Office 2007 generally convert files to 97-2003 format before uploading them to the web, but Office 2010 is well into beta testing and the new extensions will start to become more commonplace. It will be interesting to see if and how Google, Yahoo and Bing manage search for these new filetypes.

Google, Presentations, Search Strategies

Presentation: Internet Search – a challenging and ever changing landscape

CILIP in the Thames Valley, 6th October 2009, Great Expectations, Reading

The presentation I gave to CILIP in the Thames Valley on 6th October is now available in a number of locations. At least one of these should be accessible through your firewall!

PowerPoint presentation – RBA web site
Slideshare
Authorstream
Slideboom

Some of the slides have annotations from my blog and new comments so make sure you check out the notes to the slides. Many of the slides are screen shots so they won’t make much sense without the notes or unless you were at the live presentation.

images

Searching for images by colour

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This is not a frequently asked question on my workshops but when it is raised by one of the participants it generates a great deal of interest amongst the rest. So far I have come across three that I would recommend trying.

The first is Exalead’s Chromatik, which is part of the Exalead Labs experimental area. This enables you to search a selection of Flickr images by colour and optionally by keyword. You first select one or more colours or hues from a palette which are added to a bar below the palette. You can adjust the proportions of  the colours in the photos by moving the separators between the colours in the bar. Luminosity can be toggled between bright and dark, and saturation between colourful and grey levels. The last option in the list is to search for specific images using keywords (I assume this searches the titles, tags and descriptions associated with the Flickr images). The implication is that once you have selected your colours you can then limit your search to particular objects. In practice, if you search for colour followed by keyword, Chromatik ignores your colour choices and searches only on your keywords. If, for example, you want to search for apples of a particular colour you must first search on apples and then pick your colours.

It pays to keep the number of colour choices to two or three, even if you require very specific colours, as this will give you a wider range of images to choose from. When the thumbnails are displayed you can hover over the best match and select “show images with same colors”. Click on an image and it is displayed full size, but in order to see further information about it you have to right click and select properties. This will give you a URL for the original image on Flickr but only for the image itself. It does not take you to the “full” Flickr page for the photo, which means that  you cannot check ownership and copyright.

The second tool is Multicolr Search Lab from Idée Inc. This uses “10 million of the most “interesting” Creative Commons images on Flickr”. As with Chromatik you select colours from a palette. You can select up to ten colours and click on the same colour several times if you wish to increase its prominence in the photo. Unfortunately there is no keyword search. On the plus side, if you find an image you like simply click on the image to go straight to its page on Flickr where you can double check the copyright situation.

And of course there is Google’s image search. Carry out a search on your keywords in Google images and above the results there is an option to select a colour. There are only twelve colours from which to choose and you can only select one but it works well enough. If you want to search only Creative Commons images then carry out the first stage of your search in the Advanced Image Search screen and select the appropriate option from the Usage Rights menu.