Abstract: A first device decides whether or not a level of a first digital signal representative of an original picture changes discontinuously at a pixel of interest in a first elongated region. A second device generates a discontinuity condition signal representing a continuity-related condition of a discontinuity of the first digital signal in a second elongated region perpendicular to the first elongated region. First data representative of a linear interpolation coefficient is generated in response to a conversion magnification. Second data representative of a nonlinear-interpolation coefficient is generated in response to the conversion magnification and the discontinuity condition signal. The second data is selected when the signal level changes discontinuously. Otherwise, the first data is selected.

Abstract: An image data processing apparatus includes a first device for monitoring a level of a first digital signal representative of an original picture in a prescribed region having a predetermined number of pixels, and deciding whether or not the monitored level changes discontinuously at a pixel of interest in the prescribed region. First data representative of a linear interpolation coefficient are generated in response to a conversion magnification. Second data representative of a non-linear-interpolation coefficient are generated in response to the conversion magnification. The first data are selected when the monitored level does not change discontinuously at the pixel of interest. The second data are selected when the monitored level changes discontinuously at the pixel of interest. The first digital signal is subjected to an interpolation-based filtering process responsive to the selected data to generate a second digital signal representative of a conversion-result picture.

Abstract: To prevent color turbidity due to residual image characteristics of an image sensor and to improve low color saturation due to rise-response characteristics of the image sensor, a object image to be taken is separated into three primary color images two fields by two fields for each primary color image through a color separating rotary filter; and transduced into six-field primary color image signals. Each primary color image signal obtained at each first field (this includes a preceding different-color residual image signal) is omitted, but each primary color image signal obtained at each second field (this includes a preceding same-color residual image signal) is outputted as video signals in sequence.