Picture processing unit

Abstract

Abstract PURPOSE:To improve interpolation arithmetic accuracy and to reduce the cost of the unit by storing a data being the result of color correction being combination of high-order n-bit smaller than m-bit input data into a table memory and generating an interpolation data with the interpolation method according to an algorithm. CONSTITUTION:Low-order 2 bits of input data C, M, Y and SEL1, SEL2 signals from a control circuit 61 are inputted to a ROM 11. At first high-order 6 bits of the input data and outputs from a ROM 11 are added by adders 21, 22, 23 based on an address of a 1st selection table when both the SEL1, SEL2 signals are at a low level, and inputted to a table memory 31. A data read from a table memory 31 is latched in a latch 41 by using an LCK1 from the control circuit 61. An adder 51 calculates a means value of output data from latches 41-44 and outputs an obtained data C'. Signals M', Y' are obtained by the similar procedure to above.

Inventors

• 👤 Takehiko Saito
• 👤 武彦 斎藤

Bibliographic Details