Other metadata, such as websites people have visited or their device ID, would also prove useful to criminal or government spies hoping to piece together a fuller picture of targets.
The training set has 120 pictures of target object images, and the test set has 30 pictures of target object images.
This approach includes a participatory sensing application for mobile phones with which users take pictures of target areas inside a cheap and simple measurement device filled with water and send them with related metadata (e.g. location) to a central server.
First, the company's system is aimed to reduce some of the busywork that salespeople have in maintaining and updating files on people, by bringing in a number of different data sources and using them to provide composite pictures of target companies that salespeople might have had to otherwise compile with more manual means.
Once they've been compiled and cross-referenced, these pieces of information can paint a more or less complete picture of a target without ever invoking the target's name or the contents of his phone conversations.
Often they produce compelling video pictures of targets destroyed and missions accomplished.
Brooks is so gun-friendly, he affixed stickers to the walls of the trailer with pictures of targets saying, "Nothing inside worth dying for" and "If you can read this, you're in range".
Also using a form of command guidance were television-guided missiles, in which a small television camera mounted in the nose of the weapon beamed a picture of the target back to an operator who sent commands to keep the target centred in the tracking screen until impact.
But when the police stopped him, the picture of the target of terrorism drew suspicious questions from the officers, Mr. Alenany said.
Gradually police used the letters to build a picture of their target, mindful that BTK could be feeding them false clues.
