Category Archives: New features

Perspective Stabilization and Perspective Super Resolution

In our latest update to Amped FIVE, you’ll find two new filters that work together to stabilize and enhance video with an object that has some change in perspective as it moves: Perspective Stabilization and Perspective Super Resolution.

Let’s take a look at how they work!

You can also watch the two filters in action in our latest video found here:

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Amped FIVE Update 12076: Automatic Perspective Stabilization for License Plates and much more!

The festive season is on its way, but Team Amped are here with an early gift! We have another update to Amped FIVE and this time it’s huge!

Perspective Stabilization and Perspective Super Resolution

We’ve now created two new filters that work together to stabilize and enhance video that includes an object with a change in perspective as it moves. The most common scenario for this is the need to enhance the license plate of a moving car filmed by a static CCTV. While it has been possible to correct perspective issues since early versions of Amped FIVE using Perspective Registration, this could often be very time consuming and not always easy. With the Perspective Stabilization this step has now been basically automated. Of course, Perspective Registration is still there for you for the extra-difficult cases and for manual selection.

We’ve dedicated an entire post to Perspective Stabilization and Perspective Super Resolution which will be published in the next few days.

Replace Channel

Another new filter! Replace Channel replaces one color channel with another. It’s found under the Channels filter set.

Replace Channel converts the image into another selected color space and replaces one of the channels with another. Let’s take this image, for instance:

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DVRConv Update 11571: Multiplexed streams, timestamp extraction and more formats now supported

We’ve released another update for Amped DVRConv, one of the fastest ways to cleanly convert video. It is also the simplest; a clean installation tool that allows anyone who works with digital video to drag and drop proprietary video evidence in order to achieve a standard playable file – cutting out the hours, or even days, it takes to locate a proprietary player. Drag and drop – it’s that easy! With DVRConv, alongside Amped FIVE and Amped Authenticate, your workflow from scene to laboratory is completely covered and together they provide great weapons in your forensic video and image analysis arsenal!

Let’s say you regularly process video evidence and, like a lot of technicians and analysts, you are tasked with retrieving video from a scene at a location other than your lab or office. Retrieving CCTV from DVRs at scene can often be laborious, fraught with difficulty and a lot of the time the scenes are a fair distance away from your usual office. One of the most important steps during the recovery of CCTV evidence is checking to see if the download has been successful, which means playback of what is more likely to be proprietary video at scene using only a laptop and your recovery tools.

Saving time at a video recovery scene is crucial and it’s a nightmare having to trawl through hundreds of proprietary players, some of which won’t work on your current operating system or might have different versions of the same type of player. The conversion engine in Amped FIVE would be ideal, but you want something more portable to add to the tools on your retrieval laptop. This is where DVRConv steps in to quickly convert and playback your downloaded files in an easily customisable and cleanly installed package!

Utilising exactly the same conversion engine as FIVE but with twice the portability, you can not only playback and confirm your video files at scene, but have them ready for clarification and enhancement in FIVE for when you return to the office or lab.  Logs are provided for disclosure and the original files are left untouched, maintaining the continuity of your video evidence from the beginning.

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Amped Authenticate Update 11362: JPEG Dimples, Improved JPEG HT, Social Media Identification, and much more!

Not long has passed since the release of Amped Authenticate 10641 but… yes, the next one is already out! Amped Authenticate 11362 is now released with a lot of improvements, including two new filters based on JPEG Dimples, one of the last discoveries of the image forensics scientific community!

JPEG Dimples

Despite many attempts to send JPEG into retirement, today the vast majority of digital images still use it. Amped Authenticate users know that traces left by JPEG compression are a superb asset when it comes to investigating the digital history of an image, as witnessed by the vast JPEG-based toolkit that Authenticate provides: quantization table analysis, JPEG ghosts, inconsistencies in blocking artifacts, double quantization traces in the DCT coefficients, and more.

But JPEG is still full of new surprises nowadays! A few months ago, while Amped was attending (and sponsoring!) the IEEE 2017 International Workshop on Information Forensics and Security (WIFS 2017), a new footprint was presented to the scientific community: JPEG Dimples (click here to see the original work Photo forensics from JPEG dimples by Shruti Agarwal and Prof. Hany Farid).

JPEG Dimples manifest themselves as a grid of slightly brighter/darker pixels, spaced by 8 pixels in each dimension. Like most image forensic fingerprints, even JPEG Dimples are hardly visible by the human eye, but they can be easily detected with a proper algorithm.

But why does this grid appear? And why is it important for our analysis? We’ll answer these questions in detail in a future blog post, however the reason behind JPEG Dimples is rather simple: during the DCT coefficients quantization phase, different operators exist to approximate decimal values to integer values: the round operator (which approximates the decimal number to the nearest integer) the floor operator (approximation to the nearest smaller integer) or the ceil operator (approximation to the nearest bigger integer). The table below shows the difference in approximating a Value (first column) to an integer using round, floor and ceil.

Value Round Floor Ceil
9.8 10 9 10
6.3 6 6 7
4.5 5 4 5
-7.3 -7 -8 -7

Obviously, using floor tends to produce smaller values in the 8-by-8 DCT block than using round, and the opposite with ceil. And when we go back to the pixel domain, this leads to a slightly darker or brighter pixel on the top-left corner of the pixel block (see example below)! Measuring the presence of this grid will tell us to which degree an image contains the JPEG Dimples footprint.

Image showing Dimples

Example of an image showing strong JPEG Dimples

Now you may be wondering “well, how many cameras will ever be using floor or ceil in place of the more classical round?” Not so few, actually. According to the work presented at WIFS 2017, more than 60% of tested cameras do introduce Dimples. We also carried out an internal evaluation on Amped datasets and numbers were less upsetting, still, we found Dimples in roughly 30% of tested cameras. A footprint with such a spread could not be missing in Amped Authenticate, and so here we are. Continue reading

Amped FIVE Update 11284: Multiplexed Stream Support, Proprietary Timestamp, Remove Frames Filter, and a Whole Lot More

Whilst it’s been a busy time for us here at Amped with the demand for training higher than ever, we have made sure our development is continuous and we’re here again with another huge update for Amped FIVE.

A Completely Revamped Conversion Engine

As you will know, one of the biggest struggles within the world of CCTV and video analysis is the ever-increasing number of proprietary formats. Our support and development team are constantly receiving requests for new format support and in our latest update, we have enabled conversion support for BVR, DVS, H64, PSF and SHV formats, along with some variations of other formats already supported in previous versions.

All these formats are multiplexed streams. This is when a manufacturer has placed all camera footage into a single time-based video stream.

The latest FIVE not only converts the files straight away, but demultiplexes each video stream, splitting them into their own individual chains within the software. Under the Convert DVR Advanced tab you will find the options to enable this time-saving function.

Files to Convert > All, one chain per file.

No more mixed streams, no more time wasted writing carving scripts. A few clicks will now save you hours!

Multiplexed single stream decoding is huge, so expect a dedicated blog post in the next few weeks looking more deeply into decoding files of this type.

But the new conversion engine does not stop there! There are a lot of benefits even on single stream video files. Standard conversion done with vanilla FFmpeg is often not enough – there may be the risk of losing video frames because of wrongly interpreted proprietary metadata. Our new engine not only cleans almost every proprietary video format, being in MPEG4, H263, H264 and H265, but for many of them also recovers the proprietary timestamp. We found more than 50 different variations of timestamp formats!

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Identify Social Media Files with Amped Authenticate

Amped Authenticate Update 10641 introduced the new Social Media Identification filter. It can be found in the File Analysis filter group.

The filters in the File Analysis group are generally looking at the file’s container to return relevant information about the file. The Social Media Identification filter examines the file for traces of information that may indicate the file’s social media source. The key word here is “may.”

The workflow that I will explain here is typical in the US and Canada. Take from it what you need in order to apply it to your country’s legal system.

Let’s begin.

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Amped Authenticate Update 10641: Social Media Identification, Griffeye Integration & Many New Filter Options

Hi everyone!

David Spreadborough here, the International Trainer at Amped Software. It’s great to be back writing a blog post. The past few months have been very busy at Amped and our image authentication software, Amped Authenticate, has become the ‘go-to’ tool for many requiring an image’s history or to identify signs of manipulation. Helped maybe by the huge amounts of press detailing fake stories and images.

In this crazy world of multimedia forensics, we cannot stand still. The tech wizards at Amped HQ have been hard at work integrating new filters and tools to assist you further. So, let’s dive in and take a look!

Social Media Identification Filter

Under the File Analysis category, you will find this new filter.

Its purpose is to detect traces in the file formats left on images by social media platforms. As most of you probably already know, it is very easy to save other people’s images from sharing sites. With a simple right-click, you can save the displayed image to your computer.

An image from someone’s Facebook timeline

This filter now enables you to identify if the images you are examining originate from a Social Media Platform.

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Amped DVRConv for transcription?

In our most recent update of Amped DVRConv, we added the ability to separate the audio and video streams in your DME files – to save the audio as a separate file. For some, this functionality went unnoticed. For others, it was a huge deal.

Two very specific use cases required this functionality. You asked. We delivered.

Case #1 – Child Exploitation/Human Trafficking

Agencies responsible for investigating cases of child exploitation/human trafficking were spending a lot of time redacting video files (blurring faces and other sensitive information) in order to send files off for audio transcription. The distribution of files in child exploitation cases (files that can be considered child pornography) for transcription is now made a lot easier with DVRConv. All of the evidentiary videos can be loaded into the tool and processed without having to view the footage. DVRConv helps to dramatically speed up the process of getting files to transcription whilst protecting identities and shielding staff from the harmful psychological and legal effects of viewing/distributing such material.

Case #2 – Police Generated Video

Agencies that have deployed body worn/vehicle-based cameras or have interview room recorders often have to send the resulting video files to outside companies for transcription. Like the case above, they are faced with having to redact the visual information prior to releasing the files to their contractor. Even if the agency has chosen a CJIS compliant transcription contractor, they may have agency policies that require the redaction of the visual information prior to release. DVRConv eliminates the need to perform a visual redaction ahead of such a release of files. Having this ability is already saving agencies a tremendous amount of time/money.

Users of DVRConv do not require specialized training. The tool can be used by anyone. It’s drag-drop easy. Plus, the settings can be configured so that the resulting audio file meets the requirements of your transcription vendor.

If you’d like to know more about Amped DVRConv, or any of our other Amped Software products and training options, contact us today.

Amped DVRConv Update 10098: more formats, more speed, more options

Today we released an update to Amped DVRConv, the easiest way to convert videos from proprietary DVR formats.

We have been working on this update for some time and a few users have received beta updates in order to support formats that were urgently required. During this period we have re-engineered a good part of the architecture to improve stability, speed and format compatibility.

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The Amped FIVE Assistant Video Tutorial

We recently announced the release of the latest version of Amped FIVE (10039) where we introduced a new operational mode through a panel called the “Assistant”.

The Assistant provides a set of predefined workflows which can be used to automate common operations or guide new users, but it’s not obtrusive. You can use it or not, and you can always add filters or do anything, as usual, it’s just an additional option.

We’ve created a video tutorial so you can see it in action. See below or watch on YouTube now!

We’ll be adding more videos to our YouTube channel soon, so follow us to get more videos like this.