Digital camera, storage medium for image signal processing, carrier wave and electronic camera

A computer-readable recording medium that stores an image processing program that is executable by a computer, the image processing program comprising:

• a first image processing instruction that causes the computer to perform pre-treatment on image data corresponding to N lines X M rows of image data captured by an imaging device, in line sequence to create a first image data;
• a storing instruction that causes the computer to temporarily store the first image data in a first memory device;
• a second image processing instruction that causes the computer to perform format processing appropriate for recording processing on the first image data stored in the first memory device, in units of blocks each ranging over n lines X m rows (N>n, M>m, n and m each are equal to or greater than 2) in block sequence, so as to create a second image data having a block size of (n−i) X (m−j), wherein i and j are integers having values of at least 1, in the format processing, the first image data are processed through a plurality of intermediate image processing steps to create the second image data, each of the intermediate image processing steps outputting a block of intermediate image data that is temporarily stored in corresponding memory areas, the block of intermediate image data output from one of the intermediate image processing steps being input to a subsequent one of the intermediate image processing steps to ultimately generate the second image data, a block size of the blocks of intermediate image data output by the intermediate image processing steps becoming smaller sequentially to ultimately obtain the block size of (n−i) X (m−j);
• and
• a recording processing instruction that causes the computer to perform recording processing on the second image data, wherein the block size of the (n−i) X (m−j) for the second image data is used for the recording processing.

A digital camera comprising:

• an image-capturing device that captures a subject image having passed through a taking lens and outputs image data;
• a recording processing circuit that performs recording processing on image data;
• and
• an image processing circuit that, with the image data output by said image-capturing device input as data corresponding to n lines X m rows, calculates color difference signals based upon the image data thus input, performs interpolation processing and low pass filtering processing simultaneously on said color difference signals using filter coefficients for interpolation/low pass filtering and then performs matrix processing appropriate for recording performed at said recording processing circuit to generate a formatted signal, wherein
• the interpolation processing and the low pass filtering processing are carried out by an arithmetic operation and further color difference signals obtained by the interpolation processing are assigned to pixels originally having no color difference signal.

A computer-readable storage medium that stores an image processing program that is executable by a computer, the program having instructions that cause the computer to perform:

• format processing to format image data of an image captured at an image-capturing device for recording, in which color difference signals corresponding to n lines X m rows are calculated using image data that are input, interpolation processing and low pass filtering processing are performed simultaneously on the color difference signals corresponding to n lines X m rows using filter coefficients for interpolation/low pass filtering and then a formatted signal is generated by implementing matrix processing;
• and
• recording processing in which image data having undergone said format processing are recorded, wherein
• the interpolation processing and the low pass filtering processing are carried out by an arithmetic operation and further color difference signals obtained by the interpolation processing are assigned to pixels originally having no color difference signal.