Depth signal generation apparatus, pseudo stereo image signal generation apparatus, depth signal generation method, pseudo stereo image signal generation method, computer-readable recording medium recording depth signal generation program, and computer-readable recording medium recording pseudo stereo image signal generation program

摘要

A depth signal generation apparatus includes a depth signal estimation unit, a depth signal histogram generator, and a depth signal level converter. The depth signal estimation unit estimates a depth signal for each pixel of a predetermined unit in a video image signal. The depth signal histogram generator divides a range of a depth signal level which the depth signal can have, into depth signal level regions each having a predetermined range size, determines which depth signal level region includes the depth signal for each pixel, counts the number of pixels included in each depth signal level region to generate depth signal histogram data according to the count value. The depth signal level converter generates a depth signal level conversion curve according to the depth signal histogram data and generates a depth signal after level conversion by executing depth signal level conversion according to the depth signal level conversion curve.

主权项

1. A depth signal generation apparatus comprising:
a depth signal estimation unit configured to generate a depth signal which expresses a depth for each pixel of a predetermined unit in a video image signal; a depth signal histogram generator configured to divide a range of a depth signal level which the depth signal can have, into a plurality of depth signal level regions each having a predetermined size, determine which depth signal level region includes the depth signal for each pixel of the predetermined unit, and count the number of pixels included in each depth signal level region to generate depth signal histogram data which expresses a level distribution of the depth signal in the depth signal level regions, according to the counted number of pixels; a gain correction value calculator configured to calculate a dispersion value of the depth signal histogram data and calculate a gain correction value according to the dispersion value; a point generator configured to generate points for generating a depth signal level conversion curve to be used to perform level conversion of the depth signal, according to the gain correction value; an interpolation data generator configured to generate interpolation data which interpolates between the points in the depth signal level conversion curve; and a conversion curve generator configured to generate the depth signal level conversion curve using the points and the interpolation data to perform the level conversion of the depth signal using the depth signal level conversion curve.