Image file reproduction apparatus and image data reproduction apparatus

An image data reproduction apparatus comprising:

• a reproduction unit capable of reproducing image data stored in a first image file or a second image file, the first image file storing main image data and image data having a pixel count not equal to that of the main image data, the second image file storing main image data and image data having a pixel count equal to that of the main image data;
• a reception unit that receives a frame advance command for reproducing image data different from image data being currently reproduced;
• and
• a control unit that controls the reproduction unit;
• wherein,
• when the reception unit receives a frame advance command, the control unit controls the reproduction unit such that, when the reproduction unit is reproducing image data stored in the first image file, the reproduction unit reproduces image data stored in an image file different from the image file storing the image data being currently reproduced, and
• when the reproduction unit is reproducing image data stored in the second image file, the reproduction unit reproduces image data which is different from the image data being currently reproduced and is stored in the image file storing the image data being currently reproduced.

An image data reproduction apparatus comprising:

• a reproduction unit operable to reproduce image data stored in an image file capable of storing plural pieces of image data each having different feature;
• a reception unit that receives a command for changing image data to be reproduced by the reproduction unit, from the image data being currently reproduced, to image data stored in an image file different from the image file storing the image data being currently reproduced;
• a determination unit that determines whether or not the different image file stores image data having the same feature as that of the image data being currently reproduced, based on information stored in the header of the different image file;
• and
• a decision unit that decides image data to be reproduced by the reproduction unit from the image data stored in the different image file based on the result of the determination by the determination unit, when the reception unit receives a command.