Image detection method, image detection apparatus and image testing apparatus
An image detection device and an image detection technology are applied in the fields of image detection, image detection device and image inspection device, which can solve the problems of large error, inability to improve detection error, and non-identical spectroscopic characteristics, and achieve the effect of good accuracy
Active Publication Date: 2015-04-15
RICOH KK
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In addition, the difference in distortion due to the difference in the spectral characteristics of the photographed image light causes a large error when calculating the distortion of the projected image of the detection projector.
In addition, in the detection of the projected image of the projectors, the spectral characteristics of the light irradiated by each projector are not completely the same, so even if the position of the imaging device is adjusted by each projector, the lens aberration of each projector still exists. , can not improve the detection error caused by the aberration of the lens
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[0053] Hereinafter, an embodiment of an image detection device to which the present invention is applied will be described in detail with reference to the drawings. In the following embodiments, various limitations are made on constituent elements, types, combinations, positions, shapes, numbers, relative arrangements, etc., but these are merely examples, and the present invention is not limited thereto.
[0054] figure 1 It is a schematic diagram showing the configuration of an image detection device according to an embodiment of the present invention. The image detection device 10 shown in this figure includes a fixing device 11 for fixing a projector 20 to be detected, a screen 12 for projecting an image by the projector 20, a photographing device 13 for photographing the projected image projected on the screen 12, and a photographing device 13 for photographing the projected image. The image analyzing means 14 for analyzing the captured image signal, and the correction s...
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The present invention relates to an image detection method, an image detection apparatus and an image testing apparatus. A black color, a white color and a determined pattern to form an alignment pattern, and monochromatic light is used to illuminate the alignment pattern by using a projector. Then a photographic apparatus is used to take photographs of the alignment pattern on an alignment surface, and positions of the alignment pattern are analyzed via an image processing apparatus according to image signals output by the photographic apparatus. A correction value of deformation of optical properties of the photographic apparatus is calculated according to a relative relationship between an actual alignment-pattern position obtained after analysis and the position of an ideal alignment-pattern position. The correction value is used to correct the image signals obtained from projected image of the detected object with the image projected by the projector, and the optical properties of the projected image are detected according to the corrected image signals. The photographic apparatus can be corrected according to the correction value of deformation of the optical properties of the photographic apparatus, and the optical properties of the projected images of the projectors can be accurately and excellently detected.
Description
technical field [0001] The present invention relates to an image detection method for detecting optical characteristics of a projected image projected from a projector to a screen, an image detection device, and an image inspection device. Background technique [0002] The projector modulates the light beam irradiated from the light source according to the image information, creates a light image, and projects the light image on a screen. If the screen is a reflective screen, the projected image can be observed from the front side of the screen, and if the screen is a transmissive screen, the projected image can be observed from the rear side of the screen. [0003] As a characteristic for judging the quality of a projected image of a projector, there is distortion of the projected image. The deformation of the so-called projected image refers to the following states: Figure 12 As shown, the actual projected image 103 projected from the projector on the screen 102 ( The s...
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IPC IPC(8): G01M11/02G03B21/00
Inventor 中重文宏伊藤仁志首藤宪彦
Owner RICOH KK