Image compression apparatus and image compression method

An image compression apparatus includes: first and second imaging sections for capturing an image of a subject to generate first and second image signals, respectively; first and second encoding sections for encoding the first and second image signals to generate first and second image data, respectively; first and second distance measuring sections for measuring a distance to the subject for each of image blocks, at the same time as the first and second imaging sections perform image capturing, to generate first and second distance information, respectively; first and second multiplexing sections for generating first and second multiplexed data on the basis of the first and second image data and the distance, respectively, by respectively multiplexing the first and second image data and first and second distance data, which are generated on the basis of the first and second distance information and indicate the distance to the subject for each of predefined pixel blocks in the first and second image data, respectively; and a compression processing section for reducing amounts of the first and second multiplexed data to generate compressed data. The compression processing section generates the compressed data by extracting long-distance blocks in the first and second image data on the basis of the first and second distance data, respectively, calculating a differential between the long-distance blocks in the first and second multiplexed data, and deleting the long-distance blocks in the first or second multiplexed data which are identical to their counterparts in the other multiplexed data.