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Information processing apparatus, distributing identicial image data in parallel for object detection and resolution conversion

a technology of information processing apparatus and image data, applied in the field of image processing apparatus, can solve problems such as increasing the access count to image memory

Active Publication Date: 2015-01-06
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the method disclosed in Japanese Patent Laid-Open No. 2008-210009 does not perform write processing in the image memory, but increases the access count to the image memory because the resolution of an image read out from the image memory is high.

Method used

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first embodiment

[0036]The first embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 4 exemplifies the functional arrangement of an image processing apparatus 40 according to the first embodiment. The image processing apparatus 40 includes a memory 401, interconnection unit 402, image readout unit 403, image resize unit 404, detection unit 405, and image write unit 410. The memory 401 includes an input image storage area 411 and resized output image storage area 412. The detection unit 405 includes a feature extraction unit 406, integral image generation unit 407, integral image memory 408, and matching processing unit 409.

[0037]The interconnection unit 402 is, for example, a connection unit for a bus, crossbar switch, and the like. The interconnection unit 402 controls connection between the memory 401, the image readout unit 403, and the image write unit 410.

[0038]The image readout unit 403 reads out an input image or resized image (convert...

second embodiment

[0059]The second embodiment of the present invention will be described below with reference to the accompanying drawings. The second embodiment will examine a case in which a read image is divided into bands and processed. FIGS. 9A to 9D are explanatory views when a read image 901 is divided into a plurality of band data in the vertical direction and processed. In FIG. 9A, a band 902 is the first band data obtained by dividing the read image 901 into bands in the vertical direction. The band 902 is read from top to bottom in the raster scan order. After the end of reading and processing the band 902, a band 903 is read as shown in FIG. 9B. At this time, the bands 902 and 903 need to overlap each other in the horizontal direction in consideration of the size (about several tens to several hundreds of pixels depending on the target object) of the detection window of the target object. After the end of reading and processing the band 903, a band 904 is read as shown in FIG. 9C. The ban...

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PUM

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Abstract

An image processing apparatus comprising a storage unit configured to store image data; a readout unit configured to read out the image data stored in the storage unit; a detection unit configured to detect a target object from the image data read out by the readout unit; a conversion unit configured to convert a resolution of the image data read out by the readout unit; and a write unit configured to write the image data having the resolution converted by the conversion unit in the storage unit, wherein the readout unit outputs the readout image data in parallel to the detection unit and the conversion unit.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to an image processing apparatus which generates a resized image and performs processing such as image recognition, a control method thereof, and a storage medium.[0003]2. Description of the Related Art[0004]To detect target objects of various sizes when performing image recognition processing such as face detection, it is common practice to generate pyramid images by resizing an original image, and perform detection processing for each pyramid image.[0005]Japanese Patent Laid-Open No. 2008-102611 discloses a method of sequentially resizing a read image at a predetermined ratio to generate pyramid images, and then performing face discrimination processing in order to detect a face at a plurality of sizes. FIG. 1 exemplifies pyramid images for detecting a target object at various sizes. An input image 101 of 320 pixels×240 pixels is resized at every 1 / 1.2 ratio in each of the horizontal and ...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): G06K9/00G06T3/40G06T1/60
CPCG06K9/00255G06T3/40G06T1/60
Inventor OSA, KINYA
Owner CANON KK