Projection plane color correction method of projector, projection plane color correction system of projector and program for projection plane color correction of projector
AssigneeNEC Corporation
InventorJohji Tajima
Life of this patent
Estimating the term…
Abstract
By using a spectral reflectance of a projection plane or color information under a light source, which is stored in wall color storage means 4, matrix calculation means 5 calculates a conversion matrix, and mixing amounts R, G, B of primary colors of an input image are converted into corrected mixing amounts R′, G′, B′, and they are projected by means of a projector. Thereby, even in a case where a wall is colored, correct color reproduction is made in a colorimetric manner.
Claims13
1 A projection plane color correction method of a projector for projecting a color image on a projection plane such as a wall plane to display an image, characterized in that color reproduction is conducted by converting a mixing amount of primary colors to be projected on an original projection plane into a mixing amount of primary colors for reproducing an equal color by means of mixture of primary colors including color information of the projection plane.
2 A projection plane color correction method of a projector for projecting a color image on a projection plane such as a wall plane to display an image, recited in claim 1, characterized in that spectral information or color information of the projection plane such as a wall plane is measured by a color sensor, and said measured information is used.
3 A projection plane color correction method of a projector for projecting a color image on a projection plane such as a wall plane to display an image, comprising the steps of:
- converting a mixing amount of primary colors to be projected on an original projection plane into a mixing amount of primary colors for reproducing an equal color by means of mixture of primary colors including color information of the projection plane, and
- applying color area compression to a color which appears outside a range of reproduction by means of said conversion;
- Wherein color reproduction is conducted within a range of reproduction.
4 A projection plane color correction method of a projector for projecting a color image on a projection plane such as a wall plane to display an image, recited in claim 3, characterized in that spectral information or color information of the projection plane such as a wall plane is measured by a color sensor, and said measured information is used.
5 A projection plane color correction system of a projector, comprising:
- wall color storage means for storing spectral information or color information under a light source of a projection plane such as a wall plane,
- primary color conversion establishment means for establishing conversion of a mixing amount of primary colors for projecting an image on an original projection plane into a mixing amount of primary colors for projecting it on said projecting plane based on said spectral information or color information, and
- color conversion means for converting the mixing amount of primary colors for projecting an image on the original projection plane into an mixing amount of primary colors for actually projecting it by means of the conversion obtained by said establishment means;
- and
- wherein an output from said color conversion means is provided to a projector to display an image.
6 A projection plane color correction system of a projector recited in claim 5, wherein said color conversion means comprises primary color conversion means and color area compression means.
7 A projection plane color correction system of a projector recited in claim 5, characterized in that the system includes a color sensor for measuring spectral information or color information of the projection plane such as a wall plane, and the spectral information or color information obtained by said color sensor is utilized.
8 A projection plane color correction program of a projector, said comprises the steps of:
- a primary color conversion establishment step of establishing conversion of a mixing amount of primary colors for projecting an image on an original projection plane into a mixing amount of primary colors for projecting it on said projecting plane based on spectral information or color information under a light source of a projection plane such a wall plane;
- a color conversion step of converting an image data of the mixing amount of primary colors for projecting an image on the original projection plane into an image data of an mixing amount of primary colors for actually projecting it by means of the conversion obtained by said primary color conversion establishment step;
- and
- a step of providing an image data of a result of said color conversion to a projector to display an image.
9 A projection plane color correction program of a projector recited in claim 8, wherein said color conversion step comprises a primary color conversion step and a color area compression step.
10 A projection plane color correction program of a projector recited in claim 8, further comprising a step of reading the spectral information or color information of said projection plane such a wall plane from a color sensor.
11 A recording medium is stored a projection plane color correction program of a projector, said projection plane color correction program comprises the steps of:
- a primary color conversion establishment step of establishing conversion of a mixing amount of primary colors for projecting an image on an original projection plane into a mixing amount of primary colors for projecting it on said projecting plane based on spectral information or color information under a light source of a projection plane such a wall plane;
- a color conversion step of converting an image data of the mixing amount of primary colors for projecting an image on the original projection plane into an image data of an mixing amount of primary colors for actually projecting it by means of the conversion obtained by said primary color conversion establishment step;
- and
- a step of providing an image data of a result of said color conversion to a projector to display an image.
12 A recording medium is stored a projection plane color correction program of a projector recited in claim 11, wherein said color conversion step comprises a primary color conversion step and a color area compression step.
13 A recording medium is stored a projection plane color correction program of a projector recited in claim 11, said projection plane color correction program further comprising a step of reading the spectral information or color information of said projection plane such a wall plane from a color sensor.