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What is the .WSQ File Extension?

.WSQ File Extension Description:

The .wsq file extension contains a bitmap image, which is an output of the Wavelet Scalar Quantization application. The Wavelet Scalar Quantization is an algorithm for compression, which is used for fingerprint images in grayscale. The WSQ algorithm was based in the theory of wavelet, and it has set a standard for fingerprint images' replacement and storage. These images use the .wsq file extension.

The WSQ algorithm is favored over the normal compression algorithm such as JPEG for the reason that at the same ratios of compression, WSQ does not display the blocking artifacts and fine-line scale feature loss, which are not accepted as a form of identification in criminal justice and financial environments. Files with the .wsq file extension are converted in order to comply with the FBI WSQ decoder. NIST (National Institute of Standards and Technology) has dedicated a public domain for WSQ compression tools.

The Slap Fingerprint Segmentation Evaluation 2004 is an application used to test the overall accuracy of the systems for fingerprint image segmentation used together with slap images of multi-finger. The program has the function to read files with the .wsq file extension, which is a slap image that is compressed and a raw slap image that is unpacked, thus resulting into four unpacked raw segmented images with each image corresponding to a person's fingers that are slap-captured. Files with the .wsq file extension are used as input in the program for further analysis as well as to ensure that the fingerprint matches accurately to a specific individual.

The WSQ algorithm can expose several functionalities as follows:

•to store a bitmap image in .wsq file extension,thus applying the detailed compression ratio;

•to transform WSQ files into bitmap images;

•to recover attributes of the WSQ file extension;

•and to designate attributes for a WSQ file.

The WSQ file extension attributes are composed of the key = value list seen in the comments field, transform table, quantization table, and Huffman table.

Author: FBI, Los Alamos National Laboratory, and the National Institute of Standards and Technology (,NIST),
Author URL:,,
Related Applications: WSQ Algorithm, Slap Fingerprint Segmentation Evaluation 2004
Common Path: User-defined


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The Reason for .WSQ files Errors:

A common and likely reason for .WSQ files errors is failure in the Windows program registry - cleaning is essential to protect against additional harm in other applications and/or devices. While the errors continue your PC remains capable of likely blue screen errors, system failure and fatal crashes.

.WSQ files Errors - Common Symptoms:

.WSQ files error symptoms include software lock ups, system start up or shut down troubles, slow pc performance, laggy behaviour, screen freeze, beeping sounds, trouble saving documents as well as issues during application installation.

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