Image processing apparatus

Abstract

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.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to image processing apparatuses, and particularly to an image processing apparatus having a plurality of image processing blocks that are capable of real-time processing of an image signal inputted from outside.[0003]2. Description of the Background Art[0004]For an image input apparatus such as a digital still camera, Japanese Patent Application Laid-Open No. 2000-236473 discloses a conventional image processing apparatus including an imaging device, an analog signal processing circuit connected to the imaging device, and a Real-time Processing Unit (RPU) connected to the analog signal processing circuit, where the RPU is capable of processing in a real-time manner an image signal outputted from the analog signal processing circuit.[0005]However, this conventional image processing apparatus does not offer sufficient versatility in the following points:[0006]the number of taps of spatial fil...

AI Technical Summary

Benefits of technology

[0028]According to this configuration, the two-dimensional lookup table is connected to follow the color-space transformation circuit that outputs two-channel color signals. The color-space transformation block performs color-space transformation by real-time processing. When the color-space transformation is performed using a three-dimensional lookup table that involves l...

Problems solved by technology

However, this conventional image processing apparatus does not offer sufficient versatility in the following points:

it is not possible to obtain a high-frequency component when the spatial filter is set not as a high-pass filter;

it is not possible to obtain a mixture signal, such as a signal containing center pixel signal and low-frequency component at a desired ratio, as an output signal from the s...

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