Center based image resizer
View Patent ↗A method for resizing image data from a first size image to a second size image is disclosed. In one operation of the method, a scale factor is determined based on a number of gaps between pixels in the first size image and a number of gaps between pixels in the second size image. In another operation, the scale factor is applied to the first size image to generate a representation of the second size image data. In yet another operation a remainder representing an offset from a last pixel of the first size image data and a last pixel from the representation of the second size image data is determined. With the offset determined, another operation offsets each end pixel of a line of the second size image data by a portion of the remainder.
1. A method for resizing image data from a first size image to a second size image, comprising:
determining a scale factor based on a number of gaps between pixels in the first size image and a number of gaps between pixels in the second size image;
applying the scale factor to the first size image to generate a representation of the second size image data;
determining a remainder representing an offset from a last pixel of the first size image data and a last pixel from the representation of the second size image data; and
offsetting each end pixel of a line of the second size image data by a portion of the remainder.
2. The method for resizing image data as in claim 1 , wherein the portion of the remainder is one-half, the one-half portion of the remainder centering the second size image data in relation to the first size image data.
3. The method for resizing image data as in claim 1 , wherein the scale factor is applied to vertical spacing between pixels in the first image size.
4. The method for resizing image data as in claim 1 , wherein the scale factor is applied to horizontal spacing between pixels in the first image size.
5. The method for resizing image data as in claim 1 , wherein the scale factor is applied to vertical spacing and horizontal spacing between pixels in the first image size.
6. A method for center-based image resizing, comprising:
determining a scale factor based on a number of gaps between pixels in the first size image and a number of gaps between pixels in the second size image;
determining a vertical remainder representing a difference between a last pixel position of the first size image and a last pixel position of the second size image;
determining a vertical offset for the second size image based on a proportion of the remainder;
applying the scale factor and vertical offset to vertical pixels in the first size image;
determining a horizontal remainder representing a difference between a last pixel position of the first size image and a last pixel position of the second size image;
determining a horizontal offset for the second size image based on a proportion of the remainder; and
applying the scale factor and horizontal offset to horizontal pixels in the first size image.
7. The method for center-based image resizing as in claim 6 , wherein the portion of the remainder is one-half, the one-half portion of the remainder centering the second size image data in relation to the first size image data.
8. The method for center-based image resizing as in claim 6 , wherein the scale factor includes a vertical scale factor and a horizontal scale factor.
9. A method for center-based image resizing as in claim 8 , wherein the vertical scale factor and horizontal scale factor are different.
10. A computer-implemented resizer for scaling image data, comprising:
a horizontal scale factor component configured to include logic to identify a number of gaps between the horizontal pixels within a row,
a vertical accumulator, the vertical accumulator configured to apply a scale factor based on a number of gaps between vertical pixels in the first image size and a number of gaps between vertical pixels in the second image size; and
a horizontal accumulator, the horizontal accumulator configured to apply the scale factor based on a number of gaps between horizontal pixels in the first image size and a number of gaps between horizontal pixels in the second image size,
wherein a center based scaled image is output from the resizer based on the scale factor and the horizontal accumulator includes logic configured to determine a horizontal remainder based on the horizontal scale factor, a portion of the remainder applied to offset each end pixel of a line.
11. The resizer for scaling image data as in claim 10 , wherein the portion of the remainder applied to offset each horizontal row of pixels is one-half, the one-half portion horizontally centering the center based scaled image.
12. The resizer for scaling image data as in claim 10 , further including:
a vertical scale factor component configured to include logic to identify a number of gaps between the vertical pixels within a column.
13. The resizer for scaling image data as in claim 12 , wherein the vertical accumulator includes logic configured to determine a vertical remainder based on the vertical scale factor, a portion of the remainder applied to offset each end pixel of a column.
14. The resizer for scaling image data as in claim 13 , wherein the portion of the remainder applied to offset each vertical column of pixels is one-half, the one-half portion vertically centering the center based scaled image.
15. The resizer for scaling image data as in claim 13 , wherein the resizer is integrated into a graphics processing unit.
16. The resizer for scaling image data as in claim 15 , wherein the graphics processing unit is incorporated into a portable electronic device.