Back to results
US 12,135,284 B2Granted
Image processing method, image processing apparatus, imaging system, and storage medium, for content concentration estimation
AssigneeCanon Kabushiki Kaisha
InventorHironobu Koga
Life of this patent
Estimating the term…
Abstract
An image processing method includes acquiring an image obtained by imaging of an object, ambient light data during the imaging, and reflection characteristic data and transmission characteristic data which depend on a concentration of a material contained in the object, and separating a reflected light component and a transmitting light component in the image using the ambient light data, the reflection characteristic data, and the transmission characteristic data.
Claims15
An image processing method comprising:
- acquiring an image obtained by imaging of an object, ambient light data during the imaging, and reflection characteristic data and transmission characteristic data which depend on a concentration of a material contained in the object;
- separating a reflected light component and a transmitting light component in the image using the ambient light data, the reflection characteristic data, and the transmission characteristic data;
- and
- estimating a concentration of a material contained in the object based on the separated reflected light component and transmitting light component in the image,
- wherein the separating includes optimizing for acquiring, through optimization, a ratio of the reflected light component and a ratio of the transmitting light component to a luminance value of the image,
- wherein the ambient light data includes first illuminance information acquired by a first ambient light sensor and second illuminance information acquired by a second ambient light sensor, and
- wherein the optimizing performs the optimization using the following expression:
- min
- k
- R
-
- k
- T
- ,
- c
- ∑
- n
- =
- 1
- L
-
- I
- n
- -
- (
- k
- R
-
- I
- R
- 0
- ,
- n
-
- R
- n
- (
- c
- )
- +
- k
- T
-
- I
- T
- 0
- ,
- n
-
- T
- n
- (
- c
- )
- )
-
- 2
- where In is the luminance value of the image, IT0, n is the first illuminance information, IR0, n is the second illuminance information, c is the concentration of the material, Rn(c) is the reflection characteristic data, and Tn(c) is the transmission characteristic data, kR is the ratio of the reflected light component, and kT is the ratio of the transmitting light component.
55 more elements
An image processing method comprising:
- acquiring an image obtained by imaging of an object, ambient light data during the imaging, and reflection characteristic data and transmission characteristic data which depend on a concentration of a material contained in the object;
- separating a reflected light component and a transmitting light component in the image using the ambient light data, the reflection characteristic data, and the transmission characteristic data, wherein the separating includes optimizing for acquiring, through optimization, a ratio of the reflected light component and a ratio of the transmitting light component to a luminance value of the image;
- and
- estimating a concentration of a material contained in the object based on the separated reflected light component and transmitting light component in the image,
- wherein the ambient light data is illuminance information acquired by an ambient light sensor, and
- wherein the optimizing performs the optimization using the following expression:
- min
- k
- R
-
- k
- T
- ,
- c
- ∑
- n
- =
- 1
- L
-
- I
- n
- -
- (
- k
- R
-
- I
- TR
- 0
- ,
- n
-
- R
- n
- (
- c
- )
- +
- k
- T
-
- I
- TR
- 0
- ,
- n
-
- T
- n
- (
- c
- )
- )
-
- 2
- where In is the luminance value of the image, IT0, n is the first illuminance information, IR0, n is the second illuminance information, c is the concentration of the material, Rn(c) is the reflection characteristic data, and Tn(c) is the transmission characteristic data, kR is the ratio of the reflected light component, and kT is the ratio of the transmitting light component.
54 more elements
An image processing apparatus comprising:
- at least one processor or circuit configured to execute a plurality of tasks including:
- an acquiring task of acquiring an image obtained by imaging of an object, ambient light data during the imaging, and reflection characteristic data and transmission characteristic data which depend on a concentration of a material contained in the object;
- a separating task of separating a reflected light component and a transmitting light component in the image using the ambient light data, the reflection characteristic data, and the transmission characteristic data;
- and
- estimating a concentration of a material contained in the object based on the separated reflected light component and transmitting light component in the image,
- wherein the separating task acquires, through optimization, a ratio of the reflected light component and a ratio of the transmitting light component to a luminance value of the image,
- wherein the ambient light data includes first illuminance information acquired by a first ambient light sensor and second illuminance information acquired by a second ambient light sensor, and
- wherein the separating task performs the optimization using the following expression:
- min
- k
- R
-
- k
- T
- ,
- c
- ∑
- n
- =
- 1
- L
-
- I
- n
- -
- (
- k
- R
-
- I
- R
- 0
- ,
- n
-
- R
- n
- (
- c
- )
- +
- k
- T
-
- I
- T
- 0
- ,
- n
-
- T
- n
- (
- c
- )
- )
-
- 2
- where In is the luminance value of the image, IT0, n is the first illuminance information, IR0, n is the second illuminance information, c is the concentration of the material, Rn(c) is the reflection characteristic data, and Tn(c) is the transmission characteristic data, kR is the ratio of the reflected light component, and kT is the ratio of the transmitting light component.
56 more elements
An image processing apparatus comprising:
- at least one processor or circuit configured to execute a plurality of tasks including:
- an acquiring task of acquiring an image obtained by imaging of an object, ambient light data during the imaging, and reflection characteristic data and transmission characteristic data which depend on a concentration of a material contained in the object;
- a separating task of separating a reflected light component and a transmitting light component in the image using the ambient light data, the reflection characteristic data, and the transmission characteristic data;
- and
- estimating a concentration of a material contained in the object based on the separated reflected light component and transmitting light component in the image,
- wherein the separating task acquires, through optimization, a ratio of the reflected light component and a ratio of the transmitting light component to a luminance value of the image,
- wherein the ambient light data is illuminance information acquired by an ambient light sensor, and
- wherein the separating task performs the optimization using the following expression:
- min
- k
- R
-
- k
- T
- ,
- c
- ∑
- n
- =
- 1
- L
-
- I
- n
- -
- (
- k
- R
-
- I
- TR
- 0
- ,
- n
-
- R
- n
- (
- c
- )
- +
- k
- T
-
- I
- TR
- 0
- ,
- n
-
- T
- n
- (
- c
- )
- )
-
- 2
- is the luminance value of the image, ITR0, n is the illuminance information, c is the concentration of the material, Rn(c) is the reflection characteristic data, and Tn(c) is the transmission characteristic data, kR is the ratio of the reflected light component, and kT is the ratio of the transmitting light component.
56 more elements
Dependencies are inferred from the claim text.