INFORMATION PROCESSING APPARATUS AND METHOD AS WELL AS PROVIDING MEDIUM

An information processing apparatus and method as well as a providing medium which allow thumbnail images to be displayed in an arbitrary size designated by a user thereby to allow efficient management of image data. A setting inputting section detects and outputs parameters set by a user to an arithmetic section. The arithmetic section calculates one of a horizontal number or a vertical number of thumbnail images to be displayed at a time in an image display region and outputs the calculated number to a decision section. The decision section rounds the value inputted from the arithmetic section into an integer based on a predetermined criterion to obtain an integral value. The decision section further determines a width and a height for a thumbnail image using the integral value and outputs the values to a display control section. The display control section reads out image data stored in a storage section, reduces images of the image data so that each of the images may remain in a thumbnail image having the width and the height inputted from the decision section and causes the images to be displayed in the image display region.