Computer graphics processing and selective visual display system – Computer graphics processing – Attributes
Reexamination Certificate
2006-05-09
2006-05-09
Bella, Matthew C. (Department: 2676)
Computer graphics processing and selective visual display system
Computer graphics processing
Attributes
C345S589000, C345S422000, C345S629000, C345S630000
Reexamination Certificate
active
07042463
ABSTRACT:
It is an object to provide an image generating system and program which can generate such an image as in the real world with reduced processing load. The alpha-value for each pixel in the original image is set to a value corresponding to its Z-value. The set alpha-value is used to perform alpha-blending between the original image and a defocused image. As the difference between the Z-value of the focus and the depth value increases, the synthesis ratio of the defocused image is increased. The range of depth of field and defocusing effect are controlled by varying the corresponding relationship between the Z-value and the alpha-value. The alpha-value is set such that the alpha-value for an pixel located in an area AR1between Z1and Z2will be set to α1, the alpha-value for an pixel located in an area AR2between Z2and Z3will be set to α2and so forth. The alpha-value is set by updating the alpha-value of a pixel located farther from an object when the object is drawn in a frame buffer. When the original image is set as a texture which is in turn mapped through the bi-linear filtering method, the defocused image is generated by shifting the texture coordinates by a value smaller than one texel.
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Bella Matthew C.
Namco Ltd.
Tran Tam
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