Image processing apparatus, image processing program, recording medium, and image processing method

An image processing apparatus realized by running an image processing program on a PC. In the image processing apparatus, a plurality of thumbnail images included in images stored in the PC are displayed in an array in a browse mode; a classification check box is displayed in each of the images displayed in the browse mode in order to put the corresponding image into any of categories, when one or more categories are designated among the categories; a plurality of images each of which belongs to any of the designated categories are displayed in a virtual light box mode to compare the images; and at least one image is selected and designated from among the images displayed in the virtual light box mode with selective collection.