Image Processing in Forensic Science

Although digital imaging technologies have been used in a variety of scientific fields for decades, their application in the criminal justice system has been relatively recent. Today are digital image processing and imaging technologies an accepted practice in forensic science.

Sources of images can be from:

• security video,
• crime scene photographs,
• fingerprint images,
• various documents.

Common problems in images:

• poor resolution,
• poor contrast due to under or over expoisure,
• corruption with noise,
• motion blur or poor focus.

Image processing techniques:

• histogram equalisation,
• gamma correction,
• Fourier transform,
• denoising,
• deblurring,
• low-pass, high-pass, band-pass iltering.
• etc.