Method and apparatus for illumination
View Patent ↗In accordance with an example embodiment of the present invention, an apparatus comprises a light source capable of illuminating a target scene and an adjustable light filter coupled with the light source, the adjustable light filter adapted to display a filter image, the filter image created to spatially filter the illumination based at least in part on at least one parameter.
1. An apparatus, comprising:
a light source configured to illuminate a target scene;
an image processor and
an adjustable light filter coupled with said light source, said adjustable light filter adapted to display on a target scene a filter image as a grey-scale image, said filter image created to spatially filter light originating from said light source based at least in part on at least one parameter processed by the image processor to generate an input filter signal to the adjustable light filter to provide the grey-scale image, wherein brightness of each pixel of the grey-scale image is inversely proportional to a local brightness of a pre-flash image of the target scene.
2. The apparatus according to claim 1 , wherein said at least one parameter is related to the pre-flash image.
3. The apparatus according to claim 2 , wherein said pre-flash image is an image from a perspective of a view finder.
4. The apparatus according to claim 1 , wherein light originating from said light source is projected through said filter image toward a target scene.
5. The apparatus according to claim 1 , wherein light originating from said light source is adaptively attenuated by said filter image.
6. The apparatus according to claim 1 , wherein said light source is capable of flash illumination.
7. The apparatus according to claim 1 , wherein said apparatus is capable of saturation elimination.
8. The apparatus according to claim 1 , wherein said adjustable light filter comprises at least one of a liquid crystal display, digital light processing technology and liquid crystal on silicon technology.
9. The apparatus according to claim 1 , wherein said filter image comprises an achromatic image.
10. The apparatus according to claim 1 , wherein said apparatus is at least one of a camera, a communications device, a computer and a personal digital assistant.
11. The method, comprising:
processing by an image processor at least one parameter to generate an input filter signal to an adjustable light filter to provide a grey-scale image;
providing light from a light source toward a target scene; and
filtering said light using the adjustable light filter adapted to spatially filter said light to display on the target scene a filter image as the grey-scale image based at least in part on the at least one parameter processed by the image processor, wherein brightness of each pixel of the grey-scale image is inversely proportional to a local brightness of a pre-flash image of the target scene.
12. The method according to claim 11 , further comprising projecting said light toward a target scene using said light source.
13. The method according to claim 11 , wherein said at least one parameter comprises the pre-flash image of the target scene.
14. An apparatus, comprising:
at least one processor coupled with a light source and an adjustable light filter; and
at least one memory including computer program code,
said at least one memory and said computer program code configured with said at least one processor to cause said apparatus to perform at least the following:
provide illumination of a target scene using said light source; and
spatially filter light originating from said light source using said adjustable light filter to display on the target scene a filter image as a grey-scale image based at least in part on at least one parameter processed by the at least one processor to generate an input filter signal to the adjustable light filter to provide the grey-scale image, wherein brightness of each pixel of the grey-scale image is inversely proportional to a local brightness of a pre-flash image of the target scene.
15. The apparatus according to claim 14 , wherein said apparatus is capable of saturation elimination.
16. The apparatus according to claim 14 , wherein said at least one parameter is related to a pre-flash image.
17. The apparatus according to claim 14 , wherein said light source is capable of flash illumination.
18. The apparatus according to claim 14 , wherein light originating from said light source is projected through said filter image toward said target scene.
19. The apparatus according to claim 14 , wherein said apparatus is at least one of a camera, a communications device, a computer and a personal digital assistant.
20. The apparatus according to claim 14 , wherein said at least one parameter comprises the pre-flash image of the target scene.