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Identifying living skin tissue in a video sequence

A video sequence and video technology, applied in the field of skin tissue devices, can solve problems such as failure

Inactive Publication Date: 2018-01-26
KONINKLIJKE PHILIPS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] However, these methods must make assumptions about the expected size of the skin region to determine an appropriate segmentation, and thus tend to fail when the skin region is significantly smaller or larger than expected

Method used

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  • Identifying living skin tissue in a video sequence
  • Identifying living skin tissue in a video sequence
  • Identifying living skin tissue in a video sequence

Examples

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Embodiment Construction

[0055] figure 2 A device 2 that can be used to identify living skin tissue according to an embodiment of the present invention is shown in . The device 2 comprises an imaging unit 4 which captures a video sequence over a period of time. The imaging unit 4 can be or can include a camera (eg an RGB camera), which can be used for rPPG measurements. Imaging unit 4 supplies a video sequence comprising a plurality of image frames to processing unit 6 .

[0056] The processing unit 6 controls the operation of the device 2 and can include one or more processors, multi-core processors or processing modules for implementing the living skin tissue identification techniques described herein. In some embodiments, the processing unit 6 can be implemented as a plurality of processing modules, wherein each module is configured to perform a specific part or step of the living skin tissue identification techniques described herein.

[0057] The device 2 also comprises a memory unit 8 for st...

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Abstract

According to an aspect, there is provided an apparatus for identifying living skin tissue in a video sequence, the apparatus comprising a processing unit configured to obtain a video sequence, the video sequence comprising a plurality of image frames; divide each of the image frames into a first plurality of frame segments; form a first plurality of video sub-sequences, each video sub-sequence comprising a frame segment from the first plurality of frame segments for two or more of the image frames; divide each of the image frames into a second plurality of frame segments, the second pluralityof frame segments comprising a greater number of frame segments than the first plurality of frame segments; form a second plurality of video sub-sequences, each video sub-sequence comprising a frame segment from the second plurality of frame segments for two or more of the image frames; analyze the video sub-sequences in the first plurality of video sub-sequences and the second plurality of videosub-sequences to determine a pulse signal for each video sub-sequence; and analyze the pulse signals to identify areas of living skin tissue in the video sequence.

Description

technical field [0001] The present invention relates to devices and methods for identifying living skin tissue in video sequences. Background technique [0002] In recent years, techniques for performing remote photoplethysmography (remote PPG or rPPG) have been developed. These techniques enable obtaining a PPG signal from a video sequence of image frames captured using an imaging unit (eg, a camera). It is desirable to be able to process video sequences and automatically extract rPPG signals, enabling automatic surveillance of objects. However, this requires automatic identification of regions of live skin tissue in the video sequence. [0003] As one of the fundamental topics in computer vision, the task of detecting objects in videos has been extensively studied in the past few decades. Given a video sequence containing an object, the goal is to localize regions corresponding to the body parts of the object. Most existing work exploits human appearance features to di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/00A61B5/024G06K9/00G06K9/62
CPCA61B5/02416A61B5/0077A61B5/7485A61B2562/0233A61B2576/00G16H30/40G06V40/162G06V40/45G06V10/763G06V10/7715G06V40/15G06F18/2134G06V20/49G06V40/1388G06F18/22G06F2218/00A61B5/02427
Inventor 王文锦G·德哈恩
Owner KONINKLIJKE PHILIPS NV
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