Patent ID: 9324162
Filing Date: 2016-04-26
CPC Classification: G06T,H04N

Claim Text:
1. An image processing apparatus comprising: a tone mapper that losslessly tone maps image data in a floating-point representation with a lossless logarithmic mapping by multiplying a differential value between an exponent of the image data in a floating-point representation and a minimum value of the exponent by 2 to a power of a bit depth of a mantissa of the image data in a floating-point representation, and further adds the mantissa of the image data in a floating-point representation to a result of the multiplication; a base layer generator that generates base layer image data by reducing the bit depth of the image data tone mapped by the tone mapper; and an enhancement layer generator that generates enhancement layer data by using the image data tone mapped by the tone mapper and the base layer image data generated by the base layer generator.