首页>
外国专利>
METHOD AND APPARATUS FOR DETERMINING AN OUTPUT VALUE REPRESENTING A PICTURE DATA BY APPLYING A PIECE-WISE LINEAR FUNCTION ON AN INPUT DATA REPRESENTING A PICTURE DATA
METHOD AND APPARATUS FOR DETERMINING AN OUTPUT VALUE REPRESENTING A PICTURE DATA BY APPLYING A PIECE-WISE LINEAR FUNCTION ON AN INPUT DATA REPRESENTING A PICTURE DATA
展开▼
机译:通过在表示图像数据的输入数据上应用分维线性函数来确定表示图像数据的输出值的方法和装置
展开▼
页面导航
摘要
著录项
相似文献
摘要
A method and apparatus for determining an output value representing a picture data by applying a piece-wise linear function on an input value representing a picture data, said piece-wise linear function comprising at least one piece characterized by a slope value ai, an offset value and an interval defined over a range of values comprised between a lower bound and an upper bound. The method comprises: - obtaining (50) a coded input value X coded with quantization on n bits; - obtaining (51 ) a coded slope value Ai, said coded slope value Ai representing a mantissa value ai_m coded with m bits and an exponent of 2 value ai_e coded with (K-m) bits, K being the total number of bits to code said slope value ai; - identifying the (K-m) most significant bits of the coded slope, said (K-m) most significant bits forming an exponent value ai_e of a decoded slope value; - identifying the m least significant bits of the coded slope value, said m least significant bits forming the mantissa ai_m of the decoded slope value; - determining (52) the output value y by shifting the product of the mantissa ai_m of the decoded slope and the coded input data X by an integer value equal to (n+m- ai_e -p).
展开▼