Image processing for introducing blurring effects to an image
Image processing includes: applying shader code to an original image to generate a blurred image version (BIV); obtaining a composite image that is generated based at least in part on the original image and the BIV, wherein the composite image is generated by: obtaining a mask that includes an unblurred region and a blurred region; applying the mask to combine the original image and the BIV to render a composite image that includes an unblurred portion comprising a portion of the original image corresponding to the unblurred region of the mask, and a blurred portion comprising a portion of the BIV corresponding to the blurred region of the mask; and outputting the composite image to be displayed.
1. A method, comprising:
applying shader code to an original image to generate a blurred image version (BIV);
obtaining a composite image that is generated based at least in part on the original image and the BIV, wherein the composite image is generated by:
obtaining a mask that includes an unblurred region and a blurred region; and
applying the mask to combine the original image and the BIV to render a composite image that includes an unblurred portion comprising a portion of the original image corresponding to the unblurred region of the mask, and a blurred portion comprising a portion of the BIV corresponding to the blurred region of the mask; and
outputting the composite image to be displayed.
2. The method of claim 1 , wherein location of the unblurred region of the mask corresponds to a position in the original image.
3. The method of claim 1 , further comprising receiving configuration information associated with the mask.
4. The method of claim 1 , wherein the shader code is precomputed.
5. The method of claim 1 , wherein the shader code is precomputed for a plurality of kernels corresponding to a plurality of images sizes.
6. The method of claim 1 , wherein the shader code includes a precomputed one-dimensional kernel based on a blur function.
7. The method of claim 1 , wherein the shader code is selected among a plurality of precomputed shader codes that correspond to images of different sizes.
8. The method of claim 1 , wherein applying the shader code includes:
applying a first one-dimensional kernel to the original image to generate an intermediate result;
rotating the intermediate result; and
applying a second one-dimensional kernel to the rotated intermediate result.
9. The method of claim 8 , wherein applying the shader code further includes rotating a result of applying the second one-dimensional kernel to obtain the BIV.
10. A system, comprising:
one or more processors configured to:
apply shader code to an original image to generate a blurred image version (BIV);
obtain a composite image that is generated based at least in part on the original image and the BIV, wherein the composite image is generated by:
obtaining a mask that includes an unblurred region and a blurred region; and
applying the mask to combine the original image and the BIV to render a composite image that includes an unblurred portion comprising a portion of the original image corresponding to the unblurred region of the mask, and a blurred portion comprising a portion of the BIV corresponding to the blurred region of the mask; and
output the composite image to be displayed; and
one or more memories coupled to the one or more processors, configured to provide the one or more processors with instructions.
11. The system of claim 10 , wherein:
location of the unblurred region of the mask corresponds to a position in the original image.
12. The system of claim 10 , wherein the one or more processors are further configured to receive configuration information associated with the mask.
13. The system of claim 10 , wherein the shader code is precomputed.
14. The system of claim 10 , wherein the shader code is precomputed for a plurality of kernels corresponding to a plurality of images sizes.
15. The system of claim 10 , wherein the shader code includes a precomputed one-dimensional kernel based on a blur function.
16. The system of claim 10 , wherein the shader code is selected among a plurality of precomputed shader codes that correspond to images of different sizes.
17. The system of claim 10 , wherein to apply the shader code includes to:
apply a first one-dimensional kernel to the original image to generate an intermediate result;
rotate the intermediate result; and
apply a second one-dimensional kernel to the rotated intermediate result.
18. The system of claim 17 , wherein to apply the shader code further includes to rotate a result of applying the second one-dimensional kernel to obtain the BIV.
19. A computer program product embodied in a tangible non-transitory computer readable storage medium and comprising computer instructions for:
applying shader code to an original image to generate a blurred image version (BIV);
obtaining a composite image that is generated based at least in part on the original image and the BIV, wherein the composite image is generated by:
obtaining a mask that includes an unblurred region and a blurred region; and
applying the mask to combine the original image and the BIV to render a composite image that includes an unblurred portion comprising a portion of the original image corresponding to the unblurred region of the mask, and a blurred portion comprising a portion of the BIV corresponding to the blurred region of the mask; and
outputting the composite image to be displayed.