Image analysis – Image compression or coding – Quantization
Reexamination Certificate
2007-04-10
2007-04-10
Mehta, Bhavesh M. (Department: 2624)
Image analysis
Image compression or coding
Quantization
C382S242000, C382S275000, C382S298000, C382S302000, C348S404100, C358S003030, C358S003260, C375S229000, C375S240030, C375S240190, C375S240220, C375S254000
Reexamination Certificate
active
10614793
ABSTRACT:
A quantization error compensation includes a dividing unit to divide an input current image signal into a first high-frequency signal and a low-frequency signal; a changing unit to replace bits of the first high-frequency signal with a predetermined signal to output a second high-frequency signal; an adding unit to add the low-frequency signal and the second high-frequency signal to create a composite signal; a quantization unit to cut n number of bits of the composite signal and to output the cut composite signal and the n number of bit signal; an equalizing unit to output a brightness equalizing value of the cut composite signal; a calculating unit to calculate a compensation value using the n number of the bit signal and a difference between brightness equalizing values with respect to a current and next brightness levels; and a compensation unit to add the compensation and the current brightness equalizing values.
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European Search Report for Application No. 03016326.5; dated Aug. 2, 2006.
Oh Jae-hwan
Park Yung-jun
Mehta Bhavesh M.
Samsung Electronics Co,. Ltd.
Seth Manav
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