Image processing unit and method including blending processing

An image processing method for executing image processing for a plurality of polygons including translucent polygons to generate image data to be displayed, wherein color data Tn and opacity αn or transparency (1−αn) are assigned to the nth polygon of the polygons sequentially arranged from the front in a display screen, comprising:

• a step of supplying the color data Tn and opacity αn or transparency (1−αn) of said polygon sequentially from said front;
• and
• a rendering processing step of adding the color data Tn of the nth polygon to an image data Dn−1, up to the (n−1)th polygon, according to an accumulated transparency value Xn−1 of the (n−1) polygons positioned at the front.

An image processing method for executing image processing for a plurality of polygons including translucent polygons to generate image data to be displayed, wherein a color data Tn and opacity αn or transparency (1−αn) are assigned to the nth polygon of the polygons sequentially arranged from the front in a display screen comprising:

• a step of supplying the color data Tn and opacity αn or transparency (1−αn) of said nth polygon sequentially from said front;
• and
• rendering processing step of determining work data Xn by Xn=(1−αn)·Xn−1, recording said work data Xn in a work data buffer memory, and determining an image data Dn by Dn=Dn−1+Tn·αn·Xn−1.

An image processing unit for executing a predetermined blending processing for a plurality of polygons to generate image data to be displayed, wherein color data Tn and data on a destination mixing coefficient DEn, and a source mixing coefficient SRn are assigned to the nth polygon of the plurality of polygons sequentially arranged from the front in a display screen, comprising:

• a rendering processing part where the color data Tn of said nth polygon, said destination mixing coefficient DEn and source mixing coefficient SRn are supplied sequentially from said front, and the color data Tn of the nth polygon is added to an image data Dn−1, which is provided by rendering processing up to the (n−1)th polygon, according to said destination mixing coefficient DEn and an accumulated value Xn−1 of the source mixing coefficients SR1-SRn−1 of (n−1) polygons positioned at the front.

An image processing method for executing a predetermined blending processing for a plurality of polygons to generate image data to be displayed, wherein color data Tn and data on a destination mixing coefficient DEn and a source mixing coefficient SRn are assigned to the nth polygon of the plurality of polygons sequentially arranged from the front in a display screen, comprising:

• a step of supplying the color data Tn of said nth polygon, said destination mixing coefficient DEn and the source mixing coefficient SRn sequentially from said front;
• and
• a rendering processing step of adding the color data Tn of the nth polygon to the image data Dn−1, up to the (n−1)th polygon, according to said destination mixing coefficient DEn and the accumulated value Xn−1 of the source mixing coefficients SR1-SRn−1 of the (n−1) polygons positioned at the front.

An image processing unit which executes image processing for a plurality of polygons including translucent polygons, to generate image data to be displayed, wherein color data Tn, and transparency (1−αn), are assigned to the nth polygon of the polygons sequentially arranged from the front in a display screen, comprising:

• a rendering processing part where the color data Tn, and transparency (1−αn), of said nth polygon are supplied sequentially from said front, and the color data Tn of the nth polygon is added to an image data Dn−1, which is provided by rendering processing up to the (n−1)th polygon, according to an accumulated transparency value Xn−1 of the (n−1) polygons positioned at the front.

An image processing unit which executes image processing for a plurality of polygons including translucent polygons, to generate image data to be displayed, wherein color data Tn, and opacity αn are assigned to the nth polygon of the polygons sequentially arranged from the front in a display screen, comprising:

• a rendering processing part where the color data Tn, and opacity αn of said nth polygon are supplied sequentially from said front, and the color data Tn of the nth polygon is added to an image data Dn−1, which is provided by rendering processing up to the (n−1)th polygon, according to an accumulated opacity value Xn−1 of the (n−1) polygons positioned at the front.