To a certain extent SharePoint 2013 can index .tif files using its built-in TIFF iFilter. Problem is that it is not turned on by default and may not be installed on the windows server.
This article explains how to configure SharePoint 2013 to use the iFilter. I provided the text of the article for posterity. Visit the actual article for further clarification.
Enabling OCR of TIFF images for SharePoint 2013 Search
Enabling OCR of TIFF images for SharePoint 2013 Search
SharePoint 2013 Enterprise Search has the built-in ability to OCR and index the content of your scanned tiff images during a crawl (whether they are are stored in SharePoint or not). This is a very powerful feature, yet a bit mysterious to configure as the configuration steps have changed since the 2010 version. I’ll outline the steps below:
Using Server Manager, ensure the Windows TIFF iFilter feature is enabled on each crawl server
Windows TIFF iFilter Feature
Open the Local Group Policy Editor and locate the OCR folder beneath Computer Configuration > Administrative Templates.
Group Policy Editor
Edit the policy setting for “Select OCR languages from a code page”. Choose Enabled and select the appropriate languages.
Select OCR Languages
Open the SharePoint Management Shell (using Run as Administrator) and run the following commands to configure content parsing for TIFF images.
$ssa = Get-SPEnterpriseSearchServiceApplication
New-SPEnterpriseSearchFileFormat -SearchApplication $ssa tif "TIFF Image File" "image/tiff"
New-SPEnterpriseSearchFileFormat -SearchApplication $ssa tiff "TIFF Image File" "image/tiff"
Restart the SharePoint Search Host Controller service.
Restart Search Host Controller Service
Open the Search Service Application administration.
Under the Crawling navigation item, navigate to File Types. Add two new File Types for tif and tiff.Add File Type
Perform a Full Crawl of your content.
Depending on how many TIFF images are crawled, this may be a considerably longer amount of time than your previous crawl time. Additional planning may be necessary, such as potentially scoping a Content Source to only content that should be OCR’d, or adjusting crawl schedules.
If your server doesn't have the iFilter installed here are a couple of articles to help:
Windows TIFF IFilter Overview
Does Sharepoint 2013 support IFilters?