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Image processing apparatus and image processing method

An image processing device and image processing technology, applied in the direction of image communication, color signal processing circuit, picture signal generator, etc., can solve the problems of image reduction, fading, etc., so as to suppress the deterioration of image quality, suppress deterioration, and reduce inspection. effect of cycles

Inactive Publication Date: 2013-05-29
KEYENCE
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Problems solved by technology

However, in the case of producing HDR images, the entire image becomes slightly gray due to pixels with higher luminance having smaller pixel values, resulting in washed out images due to reduced chroma

Method used

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  • Image processing apparatus and image processing method
  • Image processing apparatus and image processing method
  • Image processing apparatus and image processing method

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Embodiment Construction

[0038] An image processing apparatus according to an embodiment of the present invention will be described below with reference to the drawings. It should be noted that elements having the same or similar configuration or function in all the drawings referred to in the description of the embodiment are provided with the same or similar reference numerals, and detailed descriptions thereof are omitted. Hereinafter, an image processing sensor will be described as an example of an image processing device.

[0039] figure 1 is a schematic diagram showing the configuration of an image processing sensor according to one embodiment of the present invention. Such as figure 1 As shown, the image processing sensor according to this embodiment is composed of an imaging device 1 and a display device 2 , wherein the display device 2 is connected to the imaging device 1 via a connection cable 3 in a data-communicable manner. Needless to say, the image processing sensor may be an external...

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Abstract

The invention provides an image processing apparatus and an image processing method. Provided is an image processing apparatus which can prevent deterioration in defect detection accuracy. The image processing apparatus includes an imaging unit and an image processing unit. The imaging unit converts a color image imaged by the imaging element to an HDR image based on a conversion characteristic for expanding a dynamic range, to output the HDR image. The image processing unit inversely converts color component values with respect to each pixel of the HDR image outputted from the imaging unit, based on the conversion characteristic, calculates brightness and a ratio of the color component values with respect to each pixel from the inversely converted color component values, and converts the calculated brightness based on the conversion characteristic, to generate a post-correction HDR image based on a ratio of the converted brightness and the calculated color component values.

Description

technical field [0001] The present invention relates to an image processing apparatus capable of accurately reproducing chromaticity, hue, etc. of a surface of an inspection object thereby preventing deterioration of defect detection accuracy, an image processing method and a computer program executed by the image processing apparatus. Background technique [0002] In the case of performing visual inspection on an inspection object, when an inspection object with a large contrast is imaged, overexposure may occur in a high-intensity region of the imaged image and underexposure may occur in a low-intensity region thereof. In order to avoid overexposure and underexposure in images, HDR processing has been adopted to perform image inspection of inspection objects. [0003] As typical HDR processing, for example, a plurality of images having different exposure times are imaged, and based on the plurality of imaged images, a composite image having a dynamic range wider than that ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N9/04H04N9/64H04N9/73H04N5/243
CPCH04N5/2355H04N23/741
Inventor 桂田雅章名越敬祐
Owner KEYENCE
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