Method and apparatus for converting resolution of digital hologram data

A method for converting a hologram resolution of an apparatus for converting a hologram resolution, comprising:

• receiving hologram data having a first resolution;
• configuring a plurality of hologram vectors each having a real part and an imaginary part of the hologram data;
• and
• performing a resolution conversion by using a vector prediction method for predicting a new hologram vector using sizes and angles of the plurality of hologram vectors, wherein the new hologram vector is a center vector corresponding to a center pixel, and the plurality of hologram vectors are a plurality of adjacent vectors corresponding to a plurality of adjacent pixels surrounding the center pixel,
• wherein the vector prediction method obtains a first average value by averaging the sizes of only some of the plurality of adjacent vectors, obtains a second average value by averaging the angles of the some of the plurality of adjacent vectors, and obtains a real part and an imaginary part of the new hologram vector based on the first average value and the second average value.