In CRM 2011, images are stored
in notes as MIME encoded text. As a result, images get converted to a
displayable format for every read and no pre-cached thumbnails exist. In CRM
2013, images are being introduced as a first class data type. You can now add
images as a field, capture/store images and improve query operations on images.
You can capture and maintain images for User Profile,
Contacts and Leads, and Account logos.
Data Modelling 
·        
Image data type
as a field type to the application customization experience. 
·        
Support for only
one Image field per entity. 
Storage 
·        
Image stored as
binary data in the CRM database. 
·        
Resize images
server-side to conserve storage space and improve performance. 
    § Original
image uploaded not saved. 
SDK 
·        
CRUD Operations 
   § Support
standard CRUD operations of Images the same as any other CRM data type. 
   § Reference images via URL- ability to include URL and
binary data in a RetrieveMultiple or   FetchXML
call. 
 
 
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