Generating and displaying blur in images

A computer-implemented method to provide blurring in an image, the method comprising:

• obtaining an input image;
• generating a plurality of mipmap images based on the input image, wherein generating the plurality of mipmap images includes, for each mipmap image:
• applying a blur to each particular pixel of a plurality of pixels derived from the input image for the mipmap image, wherein the blur is applied to each particular pixel based on a depth of the particular pixel into a scene depicted by the input image and based on a respective focal plane associated with the particular pixel;
• obtaining data indicating an output focal plane depth for an output focal plane of an output image;
• determining blurred output pixel values of the output image using at least one selected mipmap image of the plurality of mipmap images, including, for each designated pixel of a set of pixels of the input image, selecting the at least one selected mipmap image based on the depth of the designated pixel and based on the output focal plane depth;
• and
• causing the output image to be displayed on a display device.

A system comprising:

• a memory;
• and
• at least one processor configured to access the memory and configured to perform operations comprising:
• obtaining an input image;
• generating a plurality of background mipmap images based on the input image, wherein generating each of the background mipmap images includes applying a background blur to a plurality of background pixels derived from the input image for a respective background mipmap image, wherein each background pixel is associated with a respective depth behind a respective focal plane associated with the background pixel;
• generating a plurality of foreground mipmap images based on the input image, wherein generating each of the foreground mipmap images includes applying a foreground blur to a plurality of foreground pixels derived from the input image for a respective foreground mipmap image, wherein each foreground pixel is associated with a respective depth in front of a respective focal plane associated with the foreground pixel;
• obtaining parameter data indicating an output focal plane depth for an output focal plane of an output image and indicating an output focal range in front of the output focal plane;
• and
• generating output pixel values of the output image that include an output blur, wherein the output blur is based on particular pixels associated with a depth outside the output focal range, and wherein generating output pixel values includes:
• determining opaque pixel values based on at least one background mipmap image selected based on the output focal plane depth;
• determining overlay pixel values based on at least one foreground mipmap image selected based on the output focal range;
• and
• combining the opaque pixel values with corresponding values of the overlay pixel values to determine the output pixel values of the output image.