Object imaging system

Claim 2

An image processing system for separating one or more objects in a scene from a background of the scene, comprising: a controllable light source for illuminating the scene, the controllable light source having an on illumination level and a reduced illumination level, the controllable light source positioned at an object distance from the object and a background distance from the background, a reflectance of light from the object divided by the square of the object distance being greater than a reflectance of light from the background divided by the square of the background distance when the controllable light source is at the on illumination level and the reduced illumination level; an image input device taking two or more images of the the scene, a first scene image taken with the controllable light source on and a second scene image taken with the controllable light source at the reduced illumination level, the first scene image having an object image brighter than the object image in the second scene; a comparator comparing the first and second scene images, one or more pixels being object pixels that are brighter in the first scene image than in the second scene image; and a comparator designator designating the object pixels as an object image separate from a background image of the background of the scene.

Claim 3

A system, as in claim 1, where one or more pixels are background pixels, the background pixels having the same brightness, within a tolerance, in the first and second scene images, and the comparator designator designating the background pixels as a background image of the background of the scene instead of designating the object image.

Claim 4

A system, as in claim 1, where one or more pixels are background pixels, the background pixels having the same brightness, within a tolerance, in the first and second scene images and the comparator designator designating the background pixels as a background image of the background of the scene in addition to the object image.

Claim 5

A system, as in claim 1, where the comparator designator is a digital circuit for selecting the pixels that were brighter in the first scene image than the second scene image.

Claim 6

A system, as in claim 4, where the digital circuit is a computer and one or both of the scene images is stored on a memory storage device before being compared.

Claim 7

A system, as in claim 1, where the comparator designator is an analog circuit which subtracts and tolerances two synchronized video signals.

Claim 8

A system, as in claim 1, where the object is closer to the light source than the background and the illumination of the scene by the light source makes the object brighter, by more than a tolerance, than a brightness of the background.

Claim 9

A system, as in claim 1, where the reduced illumination level of the light source is off.

Claim 10

A system, as in claim 1 where the angle formed by the image input device, the object, and the light source is between 0 and 15 degrees.

Claim 11

A system, as in claim 1, where the image input device is a camera.

Claim 12

A system, as in claim 1, further comprising an output device.

Claim 13

A system, as in claim 1, where a part of the object image is further separated into a dark part that was dark in the first scene image and a light part that was light in the first scene image, the dark part being an image of one or more opaque parts of the object and the light part being an image of one or more translucent parts of the object.

Claim 14

An image processing system for separating one or more objects in a scene from a background of the scene, comprising: a controllable light source for illuminating the scene, the controllable light source having an on illumination level and a reduced illumination level, the controllable light source positioned at an object distance from the object and a background distance from the background, a reflector of light from the object divided by the square of the object distance being greater than a reflectance of light from the background divided by the square of the background distance when the controllable light source is at the on illumination level and the reduced illumination level; an image input device taking two or more images of the scene, a first scene image taken with the controllable light source on and a second scene image taken with the controllable light source at the reduced illumination level, the first scene image having an object image of each of the objects brighter than the object image in the second scene; an opaque enclosure that encloses the image input device and the light source, the enclosure having an opening facing the object so that the light can illuminate the object and the image input device can image the object, the enclosure opening being placed a first distance from the object so that there is a reduction in the ambient light reflected from the object to the imaging input device; a comparator for comparing the first and second scene images, one or more pixels being object pixels that are brighter in the first scene image than in the second scene image; and a comparator designator designating the object pixels as the object image separate from a background image of the background of the scene.

Claim 15

An image processing system for separating one or more objects in a scene from a background of the scene, comprising: a controllable light source for illuminating the scene, the controllable light source having an on illumination level and a reduced illumination level, the controllable light source positioned at an object distance from the object and a background distance from the background, a reflector of light from the object divided by the square of the object distance being greater than a reflectance of light from the background divided by the square of the background distance when the controllable light source is at the on illumination level and the reduced illumination level; an image input device taking two or more images of the scene, a first scene image taken with the controllable light source on and a second scene image taken with the controllable light source at the reduced illumination level, the first scene image having an object image of each of the objects brighter than the object image in the second scene; an opaque enclosure that encloses the image input device and the light source, the enclosure having an opening facing the object so that the light can illuminate the object and the image input device can image the object, the enclosure opening being placed a first distance from the object so that there is a reduction in the ambient light reflected from the object to the imaging input device; a comparator for comparing the first and second scene images, one or more pixels being object pixels that are brighter in the first scene image than in the second scene image; and a comparator designator designating the object pixels as the object image separate from a background image of the background of the scene.

Claim 16

A system, as in claim 13, where there is a transparent cover over the enclosure opening.

Claim 17

A system, as in claim 14, where the transparent cover supports the object.

Claim 18

A system, as in claim 13, where the light source is a polarized light used to reduce glare from the objects and from the supporting surface.

Claim 19

A system, as in claim 16, where a linear polarizer is placed over the light source and another linear polarizer is placed over the image input device such that the polarization axes of the two polarizers are perpendicular.

Claim 20

A system, as in claim 13, where there is a mesh covering the opening in the enclosure for supporting the object.

Claim 21

A system, as in claim 1, where more than two images are taken, each image being taken at a different light intensity of the controllable light source.