H - Electricity – 04 – N
Patent
H - Electricity
04
N
H04N 5/30 (2006.01) G06T 9/00 (2006.01)
Patent
CA 2306372
In a method and a device for transmission of S+P transform coded digitized images a mask is calculated by means of which a region of interest (ROI) can be transmitted lossless whereby the ROI can be transmitted and received lossless and still maintaining a good compression ratio for the image as a whole. This is possible since no or very few bits can be used for the remaining part of the image. The calculated mask can also be used for transmitting the coefficients needed for a lossless region of interest during any stage of the transmission.
L'invention concerne un procédé et un dispositif de transmission d'images numériques codées par transformation en S+P. Un masque calculé permet de transmettre sans perte une région d'intérêt (ROI), la ROI pouvant être transmise et reçue sans perte. Un bon taux de compression de l'image dans son ensemble demeure conservé. Cela est possible dans la mesure où aucun ou très peu de bits peuvent être utilisés pour la partie restante de l'image. Le masque calculé peut également être utilisé pour la transmission des coefficients nécessaires à la région d'intérêt pendant une étape quelconque de la transmission.
Christopoulos Charilaos
Nister David
Ericsson Canada Patent Group
Telefonaktiebolaget Lm Ericsson
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