Program, information storage medium, image generation system, and image generation method for generating an image for overdriving the display device

A computer-readable information storage medium that stores a program for generating an image, the program causing a computer to function as:

• a drawing section which draws an object to generate image data;
• and
• an overdrive effect processing section which performs overdrive effect processing for the generated image data and generates image data to be output to a display section, wherein:
• the overdrive effect processing section generates image data subjected to the overdrive effect processing by performing alpha blending which calculates IMK+(IMK−IMJ)×α based on image data IMK generated in a Kth frame, image data IMJ generated by drawing an object in a Jth frame (K>J), and an alpha value α,
• in the Kth frame, the overdrive effect processing section generates the image data IMK by drawing an object in a first buffer, and writes into a second buffer image data subjected to the overdrive effect processing by performing alpha blending which calculates IMK+(IMK−IMJ)×α based on the generated image data IMK, the image data IMJ in the Jth frame which has been written into the second buffer, and the alpha value α,
• in an Lth frame, the overdrive effect processing section generates image data IML by drawing an object in a third buffer, and writes into the first buffer image data subjected to the overdrive effect processing by performing alpha blending which calculates IML+(IML−IMK)×α based on the generated image data IML, the image data IMK in the Kth frame which has been written into the first buffer, and the alpha value α, and
• in an Mth frame (M>L>K), the overdrive effect processing section generates image data IMM by drawing an object in the second buffer, and writes into the third buffer image data subjected to the overdrive effect processing by performing alpha blending which calculates IMM+(IMM−IML)×α based on the generated image data IMM, the image data IML in the Lth frame which has been written into the third buffer, and the alpha value α.