Object detection device, object detection system, integrated circuit for object detection, camera with object detection function, and object detection method

Abstract

When an object detection device shares a bus (3) with an external memory (2) and other devices, the decrease of processing ability caused by bus occupation for resolution conversion can be suppressed. The object detection device is provided with an original image data acquisition means for acquiring original image data through the external memory (2) and the bus (3); a reduction processing means for generating a plurality of types of reduced image data reduced at mutually different reduction ratios from the acquired original image data, upon the acquisition of the original image data by the original image data acquisition means; and an object detection means (7) for detecting a position of an object shown in each of the plurality of types of reduced images, by performing a matching process using a template of the object with respect to the plurality of types of reduced image data.

Description

technical field [0001] The present invention relates to the detection of specific objects contained in image data. Background technique [0002] Conventionally, in imaging devices such as digital cameras and video cameras, an area where a specific subject is captured is detected from a captured image, and the focus of the camera is controlled based on the detection result. [0003] Here, as a subject detection method for detecting the position of a subject in a captured image, a subject detection method is proposed that can detect the positions of multiple types of subjects with different sizes in the image. [0004] As a device using such a subject detection method, the following image processing device (object detection device) is proposed such as Figure 18 As shown, the matching process is performed by using a template TP reflecting the characteristics of the subject for the original image data G0 and a plurality of reduced image data G1, G2, ..., G7 having different res...

AI Technical Summary

Problems solved by technology

[0011] Therefore, in the object detection device described in Patent Document 1, if another device occupies the bus to obtain data from the image memory, the object detection device is restricted from obtaining original image data via the bus, and the processing capability of the object detection device decreases. concerns

On the other hand, if the object detection device occupies the bus to obtain the original image data from the image memory, other devices are restricted from obtaining data via the bus, and there is a possibility that the processing capacity of other devices may decrease.

[0012] In addition, even in the object detection device described in Patent Document 2, if the resolution conversion circuit and the face detection circuit constituting a part of the object detection device are configured to obtain reduced image data from the image memory through a bus shared with other devices, then the As with the object detection device described in Document 1, there is a concern that the processing capability of this object detection device or other devices may be reduced.

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