Illuminant and device invariant colour using histogram equalisation
نویسندگان
چکیده
منابع مشابه
Illuminant and device invariant colour using histogram equalisation
Colour can potentially provide useful information for a variety of computer vision tasks such as image segmentation, image retrieval, object recognition and tracking. However, for it to be helpful in practice, colour must relate directly to the intrinsic properties of the imaged objects and be independent of imaging conditions such as scene illumination and the imaging device. To this end many ...
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In this paper we propose a new device and illumination invariant image representation based on an existing greyscale image enhancement technique: histogram equalisation. Our method is based on the premise that the rank ordering of sensor responses is preserved across a change in imaging conditions (lighting or device). We set out the theoretical conditions under which this premise is true and w...
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A chromagenic camera takes two pictures of each scene. The first is taken as normal but a specially chosen coloured filter is placed in front of the camera when capturing the second image. The chromagenic filter is chosen so that the combined image makes colour constancy, or white point estimation easier to solve. The chromagenic illuminant estimation algorithm is very simple. We compute the ex...
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The knowledge of the illuminant colour exposing an object or a scenario is very useful for computer vision and allows much more reliable colour based recognition and interpretation. In many computer vision applications humans are important parts of the scenario and the obvious detection of human skin colour is difficult due to varying illumination. Under certain conditions of direct illuminatio...
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ژورنال
عنوان ژورنال: Pattern Recognition
سال: 2005
ISSN: 0031-3203
DOI: 10.1016/s0031-3203(04)00185-2