Displacement measurement for color images by a phase-encoded joint transform correlator

Displacement measurement for color images using phase-encoded joint transform correlator (PJTC) is proposed. Color reference and target images are decomposed into red, green and blue components. We form new monochromic target and reference images by spatially arranging the three channels. The corresponding displacement of the color images is obtained using the PJTC with the new monochromic target and reference. Our method generates only one sharp peak, and could detect out the displacement of color images accurately. An appropriate hybrid-setup is proposed for pragmatic implementation.

► A displacement measurement for color images based on phase-encoding JTC is proposed. ► Technology scatters the DC item into noises distributing in the whole output plane. ► It leaves only one cross-correlation thus improving the detection ability and precision.