User sliders for simplified adjustment of images

1. A computer-implemented method for modifying an image, the method comprising:

receiving, using one or more computing devices, an input selecting the image for modification;

detecting, using the one or more computing devices, a face in the image;

determining, using the one or more computing devices, a first portion of the image including the face;

determining, using the one or more computing devices, an enhancement threshold of the first portion of the image;

providing, using the one or more computing devices, a user slider for modification of the image;

modifying, using the one or more computing devices, a second portion of the image for image enhancement in response to the user slider being selected to apply an effect, the second portion of the image excluding the first portion;

modifying, using the one or more computing devices, the first portion of the image for image enhancement without exceeding the enhancement threshold in response to the user slider being selected; and

storing, using the one or more computing devices, the modified image.

2. The computer-implemented method of claim 1 , wherein the effect is a pop effect, the user slider controls the pop effect, and the method further comprises:

determining, using the one or more computing devices, an amount of the pop effect to apply to the image based on the user slider;

adjusting, using the one or more computing devices, the image by applying the pop effect to the first portion of the image; and

applying, using the one or more computing devices, the pop effect to the second portion of the image based on the user slider.

3. The computer-implemented method of claim 2 , wherein the pop effect includes one of the group of a saturation boost, a brightness adjustment, and use of a local contrast to enhance details of the image.

4. The computer-implemented method of claim 1 , wherein the effect is a light adjustment, the user slider controls the light adjustment to the image, and the method further comprises:

extending, using the one or more computing devices, a histogram range to include an available range for the light adjustment and to spread out distributions based on a desired light adjustment amount selected using the user slider;

adjusting, using the one or more computing devices, a shadow associated with the image based on the desired light adjustment amount; and

adjusting, using the one or more computing devices, gamma associated with the image based on the desired light adjustment amount.

5. The computer-implemented method of claim 1 , wherein the effect is a light adjustment, the user slider controls the light adjustment to the image, and the method further comprises:

extending, using the one or more computing devices, a histogram range to include an available range for the light adjustment and to spread out distributions based on a desired light adjustment amount selected using the user slider;

adjusting, using the one or more computing devices, highlight details associated with the image based on the desired light adjustment amount; and

adjusting, using the one or more computing devices, gamma associated with the image based on the desired light adjustment amount.

6. The computer-implemented method of claim 1 , wherein the effect is a color adjustment, the user slider controls the color adjustment to the image, and the method further comprises:

determining, using the one or more computing devices, a color in the image that is saturated; and

saturating, using the one or more computing devices, the second portion of the image based on a color adjustment amount selected using the user slider.

7. The computer-implemented method of claim 1 , wherein the modification is resizing the image into a fixed lower resolution image, and the method further comprises:

determining, using the one or more computing devices, a number of pyramid levels to match a pre-defined fixed lower resolution image;

selecting, using the one or more computing devices, a remapping level to be a fixed offset from a top level of the pyramid levels; and

applying, using the one or more computing devices, a local Laplacian smoothing to ensure similar frequency bands are processed for differently-sized images to produce similar visual results for the fixed lower resolution image.

8. The computer implemented method of claim 1 , wherein providing the user slider for the modification of the image includes providing a user interface, the user interface including a pop slider, a color slider, a light slider, and a preview of the image.

9. A computer program product comprising a non-transitory computer usable medium including a computer program, wherein the computer program when executed on a computer causes the computer to:

receive an input selecting an image for modification;

determine a face in the image;

determine a first portion of the image including the face;

determine an enhancement threshold of the first portion of the image;

provide a user slider for modification of the image;

modify a second portion of the image for image enhancement in response to the user slider being selected to apply an effect, the second portion of the image excluding the first portion;

modify the first portion of the image for image enhancement without exceeding the enhancement threshold in response to the user slider being selected; and

store the modified image.

10. The computer program product of claim 9 , wherein the effect is a pop effect, the user slider controls the pop effect, and the computer program when executed on the computer further causes the computer to:

determine an amount of the pop effect to apply to the image based on the user slider;

adjust the image by applying the pop effect to the first portion of the image; and

apply the pop effect to the second portion of the image based on the user slider.

11. The computer program product of claim 10 , wherein the pop effect includes one from the group of a saturation boost, a brightness adjustment, and use of a local contrast to enhance details of the image.

12. The computer program product of claim 9 , wherein the effect is a light adjustment, the user slider controls the light adjustment to the image, and the computer program when executed on the computer further causes the computer to:

extend a histogram range to include an available range for the light adjustment and to spread out distributions based on a desired light adjustment amount selected using the user slider;

adjust a shadow associated with the image based on the desired light adjustment amount; and

adjust gamma associated with the image based on the desired light adjustment amount.

13. The computer program product of claim 9 , wherein the effect is a light adjustment, the user slider controls the light adjustment to the image, and the computer program when executed on the computer further causes the computer to:

extend a histogram range to include an available range for the light adjustment and to spread out distributions based on a desired light adjustment amount selected using the user slider;

adjust highlight details associated with the image based on the desired light adjustment amount; and

adjust gamma associated with the image based on the desired light adjustment amount.

14. The computer program product of claim 9 , wherein the effect is a color adjustment, the user slider controls the color adjustment to the image, and the computer program when executed on the computer further causes the computer to:

determine a color in the image that is saturated; and

saturate the second portion of the image based on a color adjustment amount selected using the user slider.

15. The computer program product of claim 9 , wherein the modification is resizing the image into a fixed lower resolution image, the computer program when executed on the computer further causes the computer to:

determine a number of pyramid levels to match a pre-defined fixed lower resolution image;

select a remapping level to be a fixed offset from a top level of the pyramid levels; and

apply a local Laplacian smoothing to ensure similar frequency bands are processed for differently-sized images to produce similar visual results for the fixed lower resolution image.

16. The computer program product of claim 9 , wherein to provide the user slider for the modification of the image, the computer program when executed on the computer further causes the computer to provide a user interface, the user interface including a pop slider, a color slider, a light slider, and a preview of the image.

17. A system comprising:

a processor; and

a memory storing instructions that, when executed, cause the system to:

receive an input selecting an image for modification;

determine a face in the image;

determine a first portion of the image including the face;

determine an enhancement threshold of the first portion of the image;

provide a user slider for modification of the image;

modify a second portion of the image for image enhancement in response to the user slider being selected to apply an effect, the second portion of the image excluding the first portion;

modify the first portion of the image for image enhancement without exceeding the enhancement threshold in response to the user slider being selected; and

store the modified image.

18. The system of claim 17 , wherein the effect is a pop effect, the user slider controls the pop effect, and the memory stores further instructions that, when executed, cause the system to:

determine an amount of the pop effect to apply to the image based on the user slider;

adjust the image by applying the pop effect to apply to the first portion of the image; and

apply the pop effect to the second portion of the image based on the user slider.

19. The system of claim 18 , wherein the pop effect includes one from the group of a saturation boost, a brightness adjustment, and use of a local contrast to enhance details of the image.

20. The system of claim 17 , wherein the effect is a light adjustment slider, the user slider controls the light adjustment to the image, and the memory stores further instructions that, when executed, cause the system to:

extend a histogram range to include an available range for the light adjustment and to spread out distributions based on a desired light adjustment amount selected using the user slider;

adjust a shadow associated with the image based on the desired light adjustment amount; and

adjust gamma associated with the image based on the desired light adjustment amount.

21. The system of claim 17 , wherein the effect is a light adjustment slider, the user slider controls the light adjustment to the image, and the memory stores further instructions that, when executed, cause the system to:

extend a histogram range to include an available range for the light adjustment and to spread out distributions based on a desired light adjustment amount selected using the user slider;

adjust highlight details associated with the image based on the desired light adjustment amount; and

adjust gamma associated with the image based on the desired light adjustment amount.

22. The system of claim 17 , wherein the effect is a color adjustment, the user slider controls the color adjustment to the image, and the memory stores further instructions that, when executed, cause the system to:

determine a color in the image that is saturated; and

saturate the second portion of the image based on a color adjustment amount selected using the user slider.

23. The system of claim 17 , wherein the modification is resizing the image into a fixed lower resolution image, and the memory stores further instructions that, when executed, cause the system to:

determine a number of pyramid levels to best match a pre-defined fixed lower resolution image;

select a remapping level to be a fixed offset from a top level of the pyramid levels; and

apply a local Laplacian smoothing to ensure similar frequency bands are processed for differently-sized images to produce similar visual results for the fixed lower resolution image.

24. The system of claim 17 , wherein to provide the user slider for the modification of the image, the memory stores further instructions that, when executed, cause the system to provide a user interface, the user interface including a pop slider, a color slider, a light slider, and a preview of the image.