Information processing device, image transmission method, and recording medium

An image transmission method comprising:

• drawing, using a processor, a processing result from software into an image memory that stores therein an image to be displayed on a terminal device that is connected through a network;
• detecting, using the processor, an update area containing an update between frames in an image drawn in the image memory;
• performing, using the processor, still image compression on an image in the update area by using one of a compression format from among multiple compression formats;
• identifying, using the processor, a high-frequency change area in which a frequency of changes between the frames in the image drawn in the image memory exceeds a predetermined frequency;
• performing, using the processor, moving image compression, from among images drawn in the image memory, on an image in the high-frequency change area;
• transmitting, using the processor, still image compressed data in the update area and moving image compressed data in the high-frequency change area to the terminal device;
• attempting, using the processor, to change a compression format used at the still image compression when compression of a moving image ends at the moving image compression;
• and
• selecting, using the processor, a compression format used at the still image compression based on the result of comparing a compression ratio of still image compressed data in update areas obtained, at the attempting, before and after a change in a compression format.

A computer readable recording medium having stored therein an image transmission program causing a computer to execute a process comprising:

• drawing a processing result from software into an image memory that stores therein an image to be displayed on a terminal device that is connected through a network;
• detecting an update area containing an update between frames in an image drawn in the image memory;
• performing still image compression on an image in the update area by using one of a compression format from among multiple compression formats;
• identifying a high-frequency change area in which a frequency of changes between the frames in the image drawn in the image memory exceeds a predetermined frequency;
• performing moving image compression, from among images drawn in the image memory, on an image in the high-frequency change area;
• transmitting still image compressed data in the update area and moving image compressed data in the high-frequency change area to the terminal device;
• attempting to change a compression format used at the still image compression when compression of a moving image ends at the moving image compression;
• and
• selecting a compression format used at the still image compression based on the result of comparing a compression ratio of still image compressed data in update areas obtained, at the attempting, before and after a change in a compression format.