Video signal processing apparatus, image display control method, storage medium, and program

A computer-readable storage medium storing a program of an image display control method applied to a video signal processing apparatus including an image sensor for outputting an image signal corresponding to an object image, wherein

• the image display control method comprises a display step of displaying on display means an object image represented by image frames sequentially output from at least two image display memory areas which alternately repeat input and output operations upon receiving a signal obtained by performing predetermined processing for an output image signal from said image sensor, a control step which, when an image frame is to be input to one of said two image display memory areas, causes the other one of said two image display memory areas to output a held image frame, and causes said two image display memory areas to alternately repeat the input and output operations, thereby switching inputting and outputting of said two image display memory areas, and a determination step of determining whether a frame rate of the output image signal from said image sensor is higher or lower than an image display rate of said display means, and
• the control step comprises changing input/output control for said two image display memory areas on the basis of a result of determination in the determination step.

A program to be supplied to a video signal processing apparatus including an image sensor for outputting an image signal corresponding to an object image, comprising a display step of displaying on display means an object image represented by image frames sequentially output from at least two image display memory areas which alternately repeat input and output operations upon receiving a signal obtained by performing predetermined processing for an output image signal from said image sensor, a control step which, when an image frame is to be input to one of said two image display memory areas, causes the other one of said two image display memory areas to output a held image frame, and causes said two image display memory areas to alternately repeat the input and output operations, thereby switching inputting and outputting of said two image display memory areas, and a determination step of determining whether a frame rate of the output image signal from said image sensor is higher or lower than an image display rate of said display means,

• wherein the control step comprises changing input/output control for said two image display memory areas on the basis of a result of determination in the determination step.