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Perícia em Áudio e Imagem e Análise de Conteúdo: o que dizem os POPs 2024 da Senasp // Perícia Criminal · Multimídia Forense Perícia em áudio e imagem e análise de conteúdo: o método por trás da prova digital Matéria técnica · Base: POPs Perícia Criminal 2024, Vol. 2 – Áudio e Imagem (Senasp/MJSP) Câmeras de CFTV, celulares e gravadores estão em quase todo lugar, e boa parte das investigações hoje depende de um vídeo ou de uma gravação. Mas um arquivo só vira prova confiável quando é tratado com método. É aí que entra a perícia em áudio e imagem, que a Secretaria Nacional de Segurança Pública (Senasp) padronizou nos Procedimentos Operacionais Padrão (POPs) de Perícia Criminal 2024 , no Volume 2, dedicado a Áudio e Imagem. Os POPs têm abrangência nacional e servem de referência para as UFs, sem engessar o perito: novas técnicas e tecnologias podem ser aplicadas. O que o Volume 2 cobre POP Exame 2.01 Análise de conteúdo em imagens 2.02 Melhoramento de qu...

Imago is a python tool that extract digital evidences from images.

Imago is a python tool that extract digital evidences from images.

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imago-forensics 🕵️

Imago is a python tool that extract digital evidences from images recursively. This tool is useful throughout a digital forensic investigation. If you need to extract digital evidences and you have a lot of images, through this tool you will be able to compare them easily. Imago allows to extract the evidences into a CSV file or in a sqlite database. If in a JPEG exif are present GPS coordinates, Imago can extract the longitude and latitude and it can convert them to degrees and to retrieve relevant information like city, nation, zip code... Imago offers also the possibility to calculate Error Level Analysis, and to detect nudity these functionalities are in BETA.

Setup

Setup via pip

  1. Install imago:
$ pip install imago
  1. Once installed, one new binary should be available: :
$ imago 
And then it should output the imago's banner

Requirements:

python 2.7
exifread 2.1.2
python-magic 0.4.15
argparse 1.4.0
pillow 5.2.0
nudepy 0.4
imagehash 4.0
geopy 1.16.0

Usage

usage: imago.py [-h] -i INPUT [-x] [-g] [-e] [-n] [-d {md5,sha256,sha512,all}]
                [-p {ahash,phash,dhash,whash,all}] [-o OUTPUT] [-s]
                [-t {jpeg,tiff}]

optional arguments:
  -h, --help            show this help message and exit
  -i INPUT, --input INPUT
                        Input directory path
  -x, --exif            Extract exif metadata
  -g, --gps             Extract, parse and convert to coordinates, GPS exif
                        metadata from images (if any)It works only with JPEG.
  -e, --ela             Extract, Error Level Analysis image,It works only with
                        JPEG. *BETA*
  -n, --nude            Detect Nudity, It works only with JPEG, *BETA*
  -d {md5,sha256,sha512,all}, --digest {md5,sha256,sha512,all}
                        Calculate perceptual image hashing
  -p {ahash,phash,dhash,whash,all}, --percentualhash {ahash,phash,dhash,whash,all}
                        Calculate hash digest
  -o OUTPUT, --output OUTPUT
                        Output directory path
  -s, --sqli            Keep SQLite file after the computation
  -t {jpeg,tiff}, --type {jpeg,tiff}
                        Select the image, this flag can be JPEG or TIFF, if
                        this argument it is not provided, imago will process
                        all the image types(i.e. JPEG, TIFF)



The only required argument is -i which is the base directory from which imago will start to search for image file. You should also provide at least one type of extraction (i.e. exif, data, gps, digest).

Example:

$ imago -i /home/solvent/cases/c23/DCIM/ -o /home/solvent/cases/c23/ -x -s -t jpeg -d all
Where:
  • -i path: is the base directory, where imago will search for file
  • -o path: the output directory where imago will save the CSV file, with the extracted metadata
  • -x : imago will extract EXIF metadata.
  • -s: the temporary SQLite database will not be deleted after the processing.
  • -t jpeg: imago will search only for jpeg images.
  • -d all: imago will calculate md5, sha256, sha512 for the jpeg images.

Features:

FunctionalityStatus
Recursive directory navigation✔️
file mtime (UTC)✔️
file ctime (UTC)✔️
file atime (UTC)✔️
file size (bytes)✔️
MIME type✔️
Exif support✔️
CSV export✔️
Sqlite export✔️
md5, sha256, sha512✔️
Error Level Analysis✔️ BETA
Full GPS support✔️
Nudity detection✔️ BETA
Perceptual Image Hashing✔️
aHash✔️
pHash✔️
dHash✔️
wHash✔️

ToDo:

TaskStatus
Test code❌
Comments and Suggestions are welcome👍

📑 Copyright and Licenses

Code copyright 2018 Redaelli. Code released under the MIT license.

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