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US 2002/0164055 A1Published application
Fingerprint/palmprint image processor and processing method
AssigneeNEC Corporation
InventorJunichi Funada
Life of this patent
Estimating the term…
Abstract
The region feature judging part judges whether local regions are regions including ridges only or regions including a mixture of creases and ridges, and the suitable ridge image selecting part selects images showing ridges among ridge candidate images based on evaluation criteria adapted to each of the crease and ridge mixed regions and ridge exclusive regions.
Claims33
A fingerprint/palmprint image processor comprising:
- a reading-in part for reading-in a fingerprint or palmprint as an image;
- an extracting part for dividing a fingerprint/palmprint image into local regions and extracting ridge candidates showing ridges for each local region;
- a determining part for determining candidate images that are highly likely to be ridges among the extracted ridge candidate images and local regions including the determined candidate images as highly reliable regions;
- a judging part for judging whether or not local regions other than the highly reliable regions are ridge exclusive regions including the existence of ridges only or crease and ridge mixed regions including a mixture of creases and ridges;
- a selecting part for selecting candidate images that are supposed to show ridges among ridge candidate images based on evaluation criteria adapted to each of the ridge exclusive regions and crease and ridge mixed regions;
- and
- a generating part for generating a whole image based on the candidate images of the highly reliable region determining part and the candidate images selected by the selecting part.
4 more elements
A fingerprint/palmprint image processing method comprising the steps of:
- reading-in a fingerprint or palmprint as an image;
- dividing the fingerprint/palmprint image into local regions and extracting ridge candidate images showing ridges for each local region;
- determining candidate images that are highly likely to be ridges among the extracted ridge candidate images and local regions including the determined candidate images as highly reliable regions;
- judging whether local regions other than the highly reliable regions are ridge exclusive regions including ridges only or crease and ridge mixed regions including a mixture of creases and ridges;
- selecting candidate images that are supposed to show ridges among the ridge candidate images based on evaluation criteria adapted to each of the ridge exclusive regions and crease and ridge mixed regions;
- and
- generating a whole image based on candidate images of the highly reliable region determining step and candidate images selected in the selecting step.
4 more elements
A program for causing a computer to carry out the processes for:
- dividing a fingerprint/palmprint image into local regions and extracting ridge candidate images showing ridges for each local region;
- determining candidate images that are highly likely to be ridges among the extracted ridge candidate images and local regions including the determined candidate images as highly reliable regions;
- judging whether or not local regions other than the highly reliable regions are ridge exclusive regions including the existence of regions only or crease and ridge mixed regions including a mixture of creases and ridges;
- selecting candidate images that are supposed to show ridges among the ridge candidate images based on evaluation criteria adapted to each of the ridge exclusive regions and crease and ridge mixed regions;
- and
- generating a whole image based on candidate images of the highly reliable region determining process and candidate images selected in the selecting process.
3 more elements
Dependencies are inferred from the claim text.