If you have attended an Amped FIVE training (if you haven’t yet, here is the list of upcoming classes), then you know how much stress we put on the “correct order of filters.” The footage you’re working with is the product of a long acquisition and processing chain, which usually introduced several artifacts. The most reasonable way to go is to compensate for these artifacts in the reverse order. If you like math, here you can find some reasons supporting this choice, which is also summarized by the drawing below. As you can see, if going from X to Z involves passing first through f and then through g, then going back from Z to X requires going through the inverse of g first, and then the inverse of f.
If you’re more on the practical side, it’s still quite intuitive: if you first put on your socks and then your shoes, you’ll have to take off the shoes first and then the socks. In this trivial example, “take off” is the inverse function of “put on”, and it is evident that you need to take off clothes in the reverse order of how you put them on!
Dear Tip Tuesday fans, welcome! This week’s Tip is dedicated to showing the power of the widely loved Amped Authenticate‘s Camera Identification filter. Based on sensor pattern noise analysis, this filter is one of the most reliable and robust in the image forensics field, where “robust” means it may still work even after the image has gone through significant processing. To demonstrate this in practice, we’ll see how the Camera Identification filter often works even on images downloaded from Facebook, which has a dramatic impact in terms of applications.
Dear Tip Tuesday lovers welcome to this new Tip! Today we’re digging into an Amped FIVE feature that almost no one knows: the logging system. You’ll discover that Amped FIVE keeps track of everything you do in every session, writes it to a text file, and stores it for your future needs. We’ll see how important this could be for repeatability.
Hi, dear Amped blog readers, welcome to this week’s Tip Tuesday! As you surely know, Amped Authenticate is the most complete image authentication suite on the market. It has so many filters… and sometimes they could be too many! Today we’re going to see how you can save time by using Batch Processing and customizing the filter configurations.
Saving time for our users is one of Amped’s main goals. We know that every day you’re dealing with a lot of casework and investigations, so we constantly strive to make our products intuitive to use, fast, and configurable. Unfortunately, there are some things that take time by their nature, and this is especially true for some of Amped Authenticate’s Local Analysis filters. The Clones Blocks, to cite the worst case, can take several minutes to run on a single image, because it has to compute millions of descriptors and match them.
Of course, we don’t like the idea of making you sit in front of the monitor waiting for a filter to complete. That’s why Authenticate features the result caching system: once a filter is computed for an image, the result is stored and will be loaded the next time you click on the filter. This functionality works great when combined with another one, the Batch Processing (available under the Tools menu).
Welcome to this week’s Tip, dear friends! Today we’re sharing with you some useful hints to create compelling reports with Amped FIVE. We’ll see the advantages of using bookmarks, grouping them into folders, and how you can insert your own comments right in the first section of the report.
Dear Tip Tuesday addict, welcome to this week’s Tip! While using Amped Authenticate have you ever noticed that, for most images, you can find a lot of different places showing dates and times? Why are they so many, and what is the difference between them? Keep reading to find out!
Hello, dear Tuesday Tip friends! This week we are talking about interlaced videos and how to deal with them with Amped FIVE. Wait! Don’t hit the “X” button yet! Even if you think you know everything about deinterlacing, stay with us! We’re not only going to see good rules, but we’ll also see an interesting exception that makes the rule. 😉
Those of you who attended Amped FIVE training classes know very well that when you load a video in FIVE and you see those “jagged lines”, you’re likely dealing with an interlaced video.
Dear Tip Tuesday lovers, welcome to this week’s Tip! When you load an image into Amped Authenticate and click on the File Format filter, a lot of tests are executed to analyze your image’s encoding properties and metadata. When Authenticate finds something suspicious, it raises a warning to help you focus your attention. Today, we will briefly review what these tests do, and show how you can customize the parameters determining their behavior.
Hello, Tip Tuesday’s loyal friends! With all the enhancement and restoration tools featured in Amped FIVE, it can easily happen that you are undecided about which filter is better to use in a specific case, or which filter configuration is the best. This week’s Tip will show you how to visually compare the output of different chains and hopefully settle the question quickly.
Hello Amped blog readers! Following last week’s Tip Tuesday idea that “simple things matter”, today we’ll show you how one of the most straightforward filters in Amped Authenticate, that is, the Thumbnail filter, can sometimes reveal interesting information.
First of all, what is the image thumbnail? It is (well… it should be) a much lower resolution version of the image, commonly in the order of 160 x 120 pixels. It is mostly used by file/image manager applications for efficiently creating image galleries: they just need to decode a few thousand instead of millions of pixels during gallery creation and browsing, while the full-size picture will be decoded when the user “opens” it. The Exif standard provides rules for embedding the thumbnail into the image file as a stand-alone JPEG object, allowing to decode it without having to process the full-sized image.