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CN-115695750-B - Display method, projector and projection system

CN115695750BCN 115695750 BCN115695750 BCN 115695750BCN-115695750-B

Abstract

Provided are a display method, a projector, and a projection system, wherein in multi-projection, the influence of the vibration of the projector on the brightness of an overlapping region where a plurality of projection images are overlapped is suppressed, thereby preventing the degradation of the display quality of the display image in the overlapping region. The image display method includes attenuating brightness of an image corresponding to an overlapping region in a first image based on a first attenuation coefficient determined based on a position within the overlapping region when a position of a projector is a reference position, calculating displacement information related to the displacement of the projector based on an output signal of an inertial sensor when the position of the projector is displaced from the reference position, correcting the first attenuation coefficient based on the displacement information, and attenuating brightness of the image corresponding to the overlapping region in the first image based on the corrected first attenuation coefficient when the position of the projector is displaced from the reference position.

Inventors

  • Naoki Naoki

Assignees

  • 精工爱普生株式会社

Dates

Publication Date
20260505
Application Date
20220728
Priority Date
20210730

Claims (7)

  1. 1. A display method, comprising the following processing: When the position of the projector is a reference position, the brightness of an image corresponding to an overlapping region where the first image and a second image displayed by another projector overlap on the display surface, among the first images displayed by the projector on the display surface, is attenuated based on a first attenuation coefficient determined according to the position in the overlapping region; Correcting the first attenuation coefficient based on displacement information relating to the displacement of the projector calculated based on an output signal of an inertial sensor fixed to the projector when the position of the projector is displaced from the reference position, and When the position of the projector is displaced from the reference position, the brightness of the image corresponding to the overlapping region in the first image is attenuated based on the corrected first attenuation coefficient.
  2. 2. The display method according to claim 1, wherein, The displacement information includes a displacement amount indicating a magnitude of displacement of the projector and a displacement direction indicating a direction of displacement of the projector, The image display method further includes a process of moving the first image in a direction opposite to the displacement direction according to the displacement amount when the position of the projector is displaced from the reference position.
  3. 3. The display method according to claim 1 or 2, wherein, The image display method further includes a process of transmitting position information on the position of the overlapping region on the display surface calculated from the displacement information to the other projector.
  4. 4. The display method according to claim 1 or 2, wherein, The first attenuation coefficient is a ratio of brightness of an image corresponding to the overlapping region in the first image to brightness of an image corresponding to a region other than the overlapping region in the first image, The second attenuation coefficient is a ratio of brightness of an image corresponding to the overlapping region in the second image to brightness of an image corresponding to a region other than the overlapping region in the second image, The sum of the first attenuation coefficient and the second attenuation coefficient is 1.
  5. 5. A projector provided with processing means programmed to perform the following processing: When the position of the projector is a reference position, the brightness of an image corresponding to an overlapping region where the first image and a second image displayed by another projector overlap on the display surface, among the first images displayed by the projector on the display surface, is attenuated based on a first attenuation coefficient determined according to the position in the overlapping region; Correcting the first attenuation coefficient based on displacement information relating to the displacement of the projector calculated based on an output signal of an inertial sensor fixed to the projector when the position of the projector is displaced from the reference position, and When the position of the projector is displaced from the reference position, the brightness of the image corresponding to the overlapping region in the first image is attenuated based on the corrected first attenuation coefficient.
  6. 6. A projection system, comprising: A first projector for displaying a first image on a display surface, and A second projector that displays a second image on the display surface, The first projector is provided with a processing device programmed to perform the following processing: When the position of the first projector is a reference position, attenuating the brightness of an image corresponding to an overlapping region where the first image and the second image overlap on the display surface, of the first image, based on a first attenuation coefficient determined from the position within the overlapping region; correcting the first attenuation coefficient based on displacement information relating to the displacement of the first projector calculated based on an output signal of an inertial sensor fixed to the first projector when the position of the first projector is displaced from the reference position, and When the position of the first projector is displaced from the reference position, the brightness of the image corresponding to the overlapping region in the first image is attenuated based on the corrected first attenuation coefficient.
  7. 7. A projection system, comprising: A first projector for displaying a first image on a display surface, and A second projector that displays a second image on the display surface, The first projector includes: A first attenuation unit that attenuates, when the position of the first projector is a reference position, the brightness of an image corresponding to an overlapping region where the first image and the second image overlap on the display surface, of the first image, based on a first attenuation coefficient determined from the position within the overlapping region; A calculation unit that calculates positional information about the position of the overlapping region on the display surface, based on positional information about the displacement of the first projector calculated based on an output signal of an inertial sensor fixed to the first projector when the position of the first projector is displaced from the reference position; an information output unit for outputting the position information to the second projector, and A correction section that corrects the first attenuation coefficient based on the displacement information, When the position of the first projector is displaced from the reference position, the first attenuation unit attenuates the brightness of an image corresponding to the overlapping region in the first image based on the corrected first attenuation coefficient, The second projector includes: A second attenuation unit that attenuates the brightness of an image corresponding to the overlapping region in the second image based on a second attenuation coefficient determined from a position within the overlapping region; an information acquisition unit for acquiring the position information, and A correction section that corrects the second attenuation coefficient based on the position information, The second attenuation unit attenuates the brightness of the second image based on the corrected second attenuation coefficient.

Description

Display method, projector and projection system Technical Field The invention relates to a display method, a projector and a projection system. Background In the case of multi-projection by a plurality of projectors, if at least 1 projector vibrates, the projected images projected by the respective projectors deviate from each other. Therefore, conventionally, in the process of performing multi-projection, a technique of correcting the deviation of the projected image is used. For example, patent document 1 discloses a multi-projection technique in which a plurality of projectors each project a detection image for detecting a deviation of a projection range. In the technique of patent document 1, in a state where the above-described detection image is projected, the imaging unit images an overlapping region where the projection ranges of the projectors overlap. Then, the detection unit detects the amount of deviation of the projected image from the captured image of the capturing unit. Finally, the deviation correcting unit processes the image signal to shift the projection range by a predetermined amount based on the detected deviation amount. Patent document 1 Japanese patent application laid-open No. 2012-165091 In the overlapping region, since 2 display images are synthesized, the ratio of the mixture of the 2 display images is generally predetermined. When a certain projector vibrates, the position of the overlapping area deviates from the original position of the overlapping area due to the vibration. However, the technique of patent document 1 shifts only the projection range by processing the image signal, and therefore, even if the display image can be displayed in the overlapping region after the shift, the display image can be displayed at a ratio of mixing corresponding to the original overlapping region. As a result, the display quality of the display image in the overlapping region may be degraded. Disclosure of Invention A method for displaying an image according to one embodiment of the present invention includes the steps of, when a position of a projector is a reference position, causing a brightness of an image corresponding to an overlapping area where the first image and a second image displayed by another projector overlap on a display surface, of a first image displayed by the projector, to be attenuated based on a first attenuation coefficient determined based on the position in the overlapping area, correcting the first attenuation coefficient based on displacement information on the displacement of the projector calculated based on an output signal of an inertial sensor fixed to the projector when the position of the projector is displaced from the reference position, and, when the position of the projector is displaced from the reference position, attenuating the brightness of the image corresponding to the overlapping area in the first image based on the corrected first attenuation coefficient. A projector according to an aspect of the present invention includes a processing device programmed to perform a process of, when a position of a projector is a reference position, causing brightness of an image corresponding to an overlapping region where the first image and a second image displayed by another projector overlap on a display surface, among first images displayed on the display surface, to be attenuated based on a first attenuation coefficient determined based on a position within the overlapping region, correcting the first attenuation coefficient based on displacement information on a displacement of the projector calculated based on an output signal of an inertial sensor fixed to the projector when the position of the projector is displaced from the reference position, and attenuating brightness of an image corresponding to the overlapping region among the first images based on the corrected first attenuation coefficient when the position of the projector is displaced from the reference position. A projection system according to one embodiment of the present invention includes a first projector that displays a first image on a display surface, and a second projector that displays a second image on the display surface, wherein the first projector includes a processing device that is programmed to perform a process of correcting, when a position of the first projector is a reference position, a first attenuation coefficient based on a first attenuation coefficient determined based on a position of the first projector in an overlapping region where the first image and the second image overlap each other on the display surface, when the position of the first projector is displaced from the reference position, the first attenuation coefficient based on displacement information calculated based on a displacement of the first projector, and to correct, when the position of the first projector is displaced from the reference position, a brightness of the first image correspondin