Shaking detection device, shaking correction device, imaging device, and shaking detection method

A shaking correction device performing matching processing and detecting an amount of shaking based on a standard image and reference image differing in exposure conditions and correcting the shaking based on the amount of shaking, comprising:

• a macro block dividing unit configured to divide each of the standard image and reference image into a plurality of macro blocks,
• a block extracting unit configured to extract a first block including one or more macro blocks each having a predetermined size from the standard image divided by the macro block dividing unit and extract a second block including one or more macro blocks each having a predetermined size from macro blocks of the reference image divided by the macro block dividing unit,
• a residual difference acquiring unit configured to acquire residual differences between the first block and the second block extracted by the block extracting unit and acquire a residual difference integral value for each of the macro blocks based on the acquired residual differences,
• a block selecting unit configured to select a predetermined number of macro blocks having small residual difference integral values acquired by the residual difference acquiring unit,
• a shaking acquiring unit configured to acquire residual differences again at the residual difference acquiring unit for the macro blocks selected by the block selecting unit and define, as the amount of shaking, a value at a predetermined place order when arranging the residual difference integral values in an order from the largest value or from the smallest value, and
• an image mixing unit configured to mix the plurality of images based on the amount of shaking found by the shaking acquiring unit.

An imaging device capturing object images, wherein

• said device comprises a shaking detection device configured to perform matching processing and detect an amount of shaking based on a standard image and reference image differing in exposure conditions,
• the shaking detection device being a shaking detection device performing matching processing and detecting shaking correction of the imaging device based on the standard image and reference image differing in exposure conditions and having
• a macro block dividing unit configured to divide each of the standard image and reference image into a plurality of macro blocks,
• a block extracting unit configured to extract a first block including one or more macro blocks each having a predetermined size from the standard image divided by the macro block dividing unit and extract a second block including one or more macro blocks each having a predetermined size from macro blocks of the reference image divided by the macro block dividing unit,
• a residual difference acquiring unit configured to acquire residual differences between the first block and the second block extracted by the block extracting unit and acquire a residual difference integral value for each of the macro blocks based on the acquired residual differences,
• a block selecting unit configured to select a predetermined number of macro blocks having small residual difference integral values acquired by the residual difference acquiring unit, and
• a shaking acquiring unit configured to acquire residual differences again at the residual difference acquiring unit for the macro blocks selected by the block selecting unit and define, as the amount of shaking, a value at a predetermined place order when arranging residual difference integral values in order from the largest value or from the smallest value.

A shaking detection method for performing matching processing and detecting an amount of shaking based on a standard image and a reference image differing in exposure conditions, including:

• a first step of dividing each of the standard image and reference image into a plurality of macro blocks,
• a second step of extracting a first block including one or more macro blocks each having a predetermined size from the standard image divided at the first step and extracting a second block including one or more macro blocks each having a predetermined size from macro blocks of the reference image divided at the first step,
• a third step of acquiring a residual difference between the first block and the second block extracted in the second step and acquiring a residual difference integral value for each of the macro blocks based on the acquired residual differences,
• a fourth step of selecting a predetermined number of macro blocks having small residual difference integral values acquired at the third step, and
• a fifth step of acquiring residual differences again for the macro blocks selected at the fourth step and defining, as the amount of shaking, a value at a predetermined place order when arranging residual difference integral values in order from the largest value or from the smallest value.