Image data processing apparatus and electronic camera

An image data processing apparatus, comprising:

• a color separation device in which a plurality of color filters, each of which (1) passes light of one of a plurality of color components, are arranged in a specified order, and (2) separates an image of a subject into the plurality of color components;
• an imaging device which images the image of the subject which has been color-separated by the color separation device with a plurality of pixels;
• an A/D conversion device which A/D converts an image signal outputted from the imaging device;
• and
• a data size conversion device which changes a data size of the image data after A/D conversion at an optional ratio, wherein:
• the data size conversion device newly calculates a value of color component of each pixel after changing the data size based upon values of color components of a plurality of same color pixels before changing the data size, while maintaining the order of arrangement of the plurality of color components,
• the each pixel after changing the data size and the plurality of the same color pixels before changing the data size have one of the plurality of color components, and
• when the data size conversion device calculates a value of color component of a new pixel after changing the data size having a specific color component, the data size conversion device varies a coefficient used to calculate the value of color component of the new pixel according to a relative positional relationship between the new pixel after changing the data size having the specific color component and a plurality of same color pixels before changing the data size having the specific color component, and
• the relative positional relationship varies according to a position of the new pixel.

An electronic camera comprising:

• a color separation device in which a plurality of color filters, each of which (1) passes light of one of a plurality of color components, are arranged in a specified order, and (2) separates an image of a subject into the plurality of color components;
• an imaging device which images the image of the subject which has been color-separated by the color separation device with a plurality of pixels;
• an A/D conversion device which A/D converts an image signal outputted from the imaging device;
• and
• a data size conversion device which changes a data size of the image data after A/D conversion at an optional ratio, wherein
• the data size conversion device newly calculates a value of color component of each pixel after changing the data size, based upon values of color components of a plurality of same color pixels before changing the data size, while maintaining the order of arrangement of the plurality of color components,
• the each pixel after changing the data size and the plurality of the same color pixels before changing the data size have one of the plurality of color components, and
• when the data size conversion device calculates a value of color component of a new pixel after changing the data size having a specific color component, the data size conversion device varies a coefficient used to calculate the value of color component of the new pixel according to a relative positional relationship between the new pixel after changing the data size having the specific color component and a plurality of same color pixels before changing the data size having the specific color component, and
• the relative positional relationship varies according to a position of the new pixel.

An image data processing method comprising:

• obtaining an image data that has a plurality of pixels each of which includes any one of a plurality of color components which are arranged in a specific order;
• and
• changing a data size of the image data at an optional ratio, wherein:
• a value of color component of each pixel after changing the data size is newly calculated based upon values of color components of a plurality of same color pixels before changing the data size in order to change the data size while maintaining the order of arrangement of the plurality of color components,
• the each pixel after changing the data size and the plurality of the same color pixels before changing the data size have one of the plurality of color components, and
• when calculating a value of color component of a new pixel after changing the data size having a specific color component, the data size conversion device varies a coefficient used to calculate the value of color component of the new pixel according to a relative positional relationship between the new pixel after changing the data size having the specific color component and a plurality of same color pixels before changing the data size having the specific color component;
• and
• the relative positional relationship varies according to a position of the new pixel.

A computer-readable recording medium containing a control program for image data size conversion processing, the control program comprising instructions of:

• obtaining an image data that has a plurality of pixels each of which includes any one of a plurality of color components which are arranged in a specific order;
• and
• changing a data size of the image data at an optional ratio, wherein:
• a value of color component of each pixel after changing the data size is newly calculated based upon values of color components of a plurality of same color pixels before changing the data size in order to change the data size while maintaining the order of arrangement of the plurality of color components,
• the each pixel after changing the data size and the plurality of the same color pixels before changing the data size have one of the plurality of color components, and
• when calculating a value of color component of a new pixel after changing the data size having a specific color component, the data size conversion device varies a coefficient used to calculate the value of color component of the new pixel according to a relative positional relationship between the new pixel after changing the data size having the specific color component and a plurality of the same color pixels before changing the data size having the specific color component;
• and
• the relative positional relationship varies according to a position of the new pixel.