초록 ▼

A system (12) for providing an adjusted image (228) of a scene (10) from a blurred captured image (14) includes a control system (26) that provides the adjusted image (228). The control system (26) can create a downsampled blurred image (236) from the captured image (14), deblur the downsampled blur

A system (12) for providing an adjusted image (228) of a scene (10) from a blurred captured image (14) includes a control system (26) that provides the adjusted image (228). The control system (26) can create a downsampled blurred image (236) from the captured image (14), deblur the downsampled blurred image (236) to create a downsampled deblurred image (238), and upsample the downsampled deblurred image (238) to create the adjusted image (228). With this design, because the deblurring is performed on the downsampled blurred image (236), the computational and memory costs are substantially less than if this task is performed on the original captured image (14). Further, the control system (26) can create the adjusted image (228) using a joint bilateral filter that combines information from the blurred captured image (14) and the downsampled deblurred image (238).

대표청구항 ▼

1. A system for providing an adjusted image of a scene from a blurred captured image, the system comprising: a control system including a processor, wherein the control system creates a downsampled blurred image from the blurred captured image, deblurs the downsampled blurred image to create a downs

1. A system for providing an adjusted image of a scene from a blurred captured image, the system comprising: a control system including a processor, wherein the control system creates a downsampled blurred image from the blurred captured image, deblurs the downsampled blurred image to create a downsampled deblurred image, and upsamples the downsampled deblurred image to create the adjusted image, using a joint bilateral filter that combines information from the blurred captured image and the downsampled deblurred image; wherein the joint bilateral filter can be expressed as follows: S⁡(x❘Sd⁡(x↓);B)=1C⁡(X)⁢∑x′↓∈N⁡(x↓)⁢Gspatil_distance⁡(x↓-x′↓)⁢GIntensity_distance⁡(B⁡(x)-B⁡(x′))*Sd⁡(x′↓) wherein (i) B is the captured image; (ii) Sd is downsampled deblurred image; (iii) S is the final, adjusted image; (iv) C is a normalization coefficient; (v) N(x) is a small neighborhood of a pixel x; (vi) G is a Gaussian function; (vii) x denotes the pixel coordinate in the upsampled adjusted image; (viii) x′ denotes a neighboring pixel to pixel x; and (ix) x↓, x′↓ denote the corresponding coordinates in the downsampled deblurr image Sd. 2. The system of claim 1 wherein the control system estimates a point spread function and deconvolutes the downsampled blurred image using the estimated point spread function. 3. A system for providing an adjusted image of a scene from a first blurred captured image of the scene and a second captured image of the scene, the system comprising: a control system including a processor, wherein the control system creates a first downsampled blurred image from the first blurred captured image, creates a second downsampled from the second captured image, provides a downsampled deblurred image from the first downsampled blurred image and the second downsampled image, and upsamples the downsampled deblurred image to create the adjusted image, using a joint bilateral filter that combines information from one of the captured images and the downsampled deblurred image; wherein the joint bilateral filter can be expressed as follows: S⁡(x❘Sd⁡(x↓);B)=1C⁡(X)⁢∑x′↓∈N⁡(x↓)⁢Gspatil_distance⁡(x↓-x′↓)⁢GIntensity_distance⁡(B⁡(x)-B⁡(x′))*Sd⁡(x′↓) wherein (i) B is the captured image; (ii) Sd is downsampled deblurred image; (iii) S is the final, adjusted image; (iv) C is a normalization coefficient; (v) N(x) is a small neighborhood of a pixel x; (vi) G is a Gaussian function; (vii) x denotes the pixel coordinate in the upsampled adjusted image; (viii) x′ denotes a neighboring pixel to pixel x; and (ix) x↓, x′↓ denote the corresponding coordinates in the downsampled deblurr image Sd. 4. The system of claim 3 wherein the first blurred captured image is properly exposed and the second captured image is properly underexposed. 5. The system of claim 3 wherein the control system estimates a point spread function and deconvolutes the first downsampled blurred image using the estimated point spread function. 6. A system for providing an adjusted image of a scene from a blurred captured image, the system comprising: a control system including a processor, wherein the control system (i) creates a downsampled blurred image from the blurred captured image, (ii) deblurs the downsampled blurred image to create a downsampled deblurred image, and (iii) upsamples the downsampled deblurred image using a joint bilateral filter that combines information from the blurred captured image and the downsampled deblurred image to create the adjusted image. 7. The system of claim 6 wherein the control system estimates a point spread function and deconvolutes the downsampled blurred image using the estimated point spread function. 8. A system for providing an adjusted image of a scene from a first blurred captured image of the scene and a second captured image of the scene, the system comprising: a control system including a processor, wherein the control system (i) creates a first downsampled blurred image from the first blurred captured image, (ii) creates a second downsampled image from the second captured image, (iii) provides a downsampled deblurred image from the first downsampled blurred image and the second downsampled image, and (iv) upsamples the downsampled deblurred image using a joint bilateral filter that combines information from one of the captured images and the downsampled deblurred image to create the adjusted image. 9. The system of claim 8 wherein the control system estimates a point spread function and deconvolutes the first downsampled blurred image using the estimated point spread function. 10. The system of claim 8 wherein the first blurred captured image is properly exposed and the second captured image is properly underexposed.