Image processing apparatus having a plurality of image processing blocks that are capable of real-time processing of an image signal

摘要

An image processing apparatus is provided which offers higher versatility than conventional image processing apparatuses. When an input signal to a spatial filtering block is a monochrome signal that contains Y component only, a selector selects its input terminal and a selector selects its input terminal. Then, a low-pass filter output signal of a programmable spatial filter is inputted to a spatial filter, and a low-pass filter output signal of the spatial filer is inputted to a spatial filter. That is, the programmable spatial filter and the spatial filters are connected in series (in cascade), and the cascade-connected three spatial filters perform filtering operation. In this example, low-pass filters with 5×5 taps are connected in cascade in three stages, which enables low-pass filtering with 13×13 taps.

主权项

1. An image processing apparatus comprising:
a plurality of image processing blocks that are capable of real-time processing of an image signal inputted from outside, said plurality of image processing blocks including a spatial filtering block that applies a spatial filtering to an input signal, said spatial filtering block including,
a first low-pass filter that performs a first low-pass filtering;a programmable spatial filter; anda first operator that subtracts a first low-pass filter output signal that is an output signal of said first low-pass filter from a center pixel signal that is an original pixel signal, so as to generate a high-frequency component, whereinsaid spatial filtering block is capable of simultaneously outputting at least two signals of said first low-pass filter output signal, a signal output from and filtered by said programmable spatial filter, and said high-frequency component,when said programmable spatial filter is set as a low-pass filter, said at least two signals include said high-frequency component, andwhen said programmable spatial filter is set as a high-pass filter, said at least two signals include said first low-pass filter output signal.