addition to the normative requirements presented in ISO/IEC , open issue talking over objective metric for human perceived quality vs. metric for. The Part 5 of the ISO/IEC standard, which is mentioned in the ICAO ( International Civil Aviation Organization) recommendations about the travel. As per ISO/IEC Face Image Data standard, there are mainly two types of face images as follows: Basic face image: It specifies face image record format.

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The face has to be centered both vertically and horizontally. From Wikipedia, the free encyclopedia. By using this site, you agree to the Terms of Use and Privacy Policy. This type of Face Image Type includes the full head with all hair in most cases, as well as neck and shoulders.

Bibliography Click here if you are interested in any of the publications below. Unfortunately, due to the lack of clear specifications and of an appropriate benchmark, comparing the performance of such systems is not easy.

The tests can be organized into three categories: For this reason a training set of images of which 50 are fully compliant has been extracted from the BioLab-ICAO database to be used for parameters setup and training. Images labeled as dummy for a given characteristic are of course excluded from the corresponding test. The geometric requirements are specified as a function of some measures represented in the following figure; Photographic and pose-specific tests: In some cases a non neutral expression and closed eyes may be acceptable.

Retrieved from ” https: Pose The applicant shall be shown facing square to the camera, not loking over one shoulder portrait style.

Evaluation Due to privacy restrictions the database cannot be downloaded. Colours and lighting The portrait shall be colour neutral showin the applicant with eyes open and clearly visible. Head coverings Head coverings shall not be accepted except in circumstances which the comptetent State authority specifically approves.

To enable many applications on variety of devices, including devices that have the limited resources required for data storage, and to improve face recognition accuracy, this International Standard specifies not only a data format, but also:.


Face is chosen as the primary globally interoperable biometric characteristic for machine assisted identity confirmation in Machine Readable Travel Documents MRTD. The photograph showed below have been published by ICAO. Hair style and expression No hair shall obscure big areas of jso face or the eyes. Database An ad hoc database has been created using, ios possible, public databases and acquiring additional images to cover the missing defects. Dynamic range of levels in the face area is recommended.

ISO/IEC – Wikipedia

In any case the child shall be alone with no other people, chair backs or toys visible. Children States may issue special recommendations for children. Position of the subject and background The subject shall not be to close nor to far from the camera: Testing Protocol The algorithms for compliance verification are usually characterized by a set of parameters that need to be tuned according to the kind of images the algorithm has to process.

All the remaining Face Image Types inherit the properties of this type. Nowadays the digital images are replacing the traditional photos on photographic paper in all kind of applications: The dummy value is used for the cases of uncertainty e.

Those recommendations are used in several countries also for the issuance of driver licenses or residence permits. A precise formalization is here proposed to limit as much as possible the ambiguity. A Face Image Type that specifies frontal images with sufficient resolution for human examination as well as reliable computer face recognition. Quality of the photograph The portrait shall be in sharp focus from nose to ears, of high quality with no creases or ink marks.

It requires less detail, which makes it suitable for less demanding applications. Modern biometric passport photos should comply with this standard.

Four face image types are introduced to define categories that satisfy the needs of different applications, and the requirements above are specified for each image type: ICAO completed the ISO standard publishing in Documentpart 1, volume 1, examples of acceptable or not acceptable photographs for travel document based on this standard.

lso No mandatory scene, photographic and digital requirements are specified for this image type. The photographs for travel documents usually needs to be recent – not older than 6 months – if submitted as a print, it should be on high quality paper with high resolution. This image type is suitable for permanent storage of the face information, and it is applicable to ID portraits for passportdriver’s licenseand mug shot images.


For teststhe number of images n i included in the subset related to the characteristic i is: The ISO standard donesn’t allow digital alteration of the image to correct the dynamic range or the colours.

Images have been reduced in size and 91794-5. The frames 1994-5 not cover any part of the eyes. The standard is intended to allow computer analysis of face images for automated face identification one-to-many searching and authentication one-to-one matchingas well as human identification of distinctive features such as moles and scars that might be used to verify identity, and human verification of computer identification results.

Specifications summary Position of the subject and background Pose Quality of the photograph Colors and lighting Hair style and expression Lighting of the applicant and background Eye glasses Head coverings Children Position of the subject and background The subject shall not be to close nor to far from the camera: The database contains 5, images, gathered from different sources: If possible, avoid heavy frames. Eye glasses The portrait shall show the eyes with no light reflection off the glasses and no tinted lenses.

The database consists of fully compliant images i. The rest of images are used for testing.

ISO/IEC 19794-5

Some information about the composition of both training and test set are given in the following table where for each characteristic the number of compliant Cnon-compliant NC and dummy D images are reported. Reflexion on the face.

The head should be upright so thaht an imaginary horizotal line drawn between the centres of the eyes is parallel to the top edge of the picture. In order to enable applications that run on a variety of devices, including those with limited resources such as embedded systemsand to improve face recognition accuracy, the specification describes not only the data format, but also additional requirements, namely: Skip to main content.

Last modified: April 24, 2020