Camera signal processing apparatus and camera signal processing method

A camera signal processing method comprising the steps of:

• interpolating pixel data in at least two directions based on a position of said pixel data and/or pixel data around said position, said pixel data being generated based on an imaging signal coming from a solid-state image sensor in which an imaging light enters through a color filter having a different spectral characteristic for each pixel, thereby separately generating interpolated pixel data in said at least two directions;
• detecting a correlation value indicative of a degree of correlation in each of said at least two directions of said interpolated pixel data;
• normalizing said correlation value in each of said at least two directions to generate a normalized value indicative of a relative value of said correlation value in each of said at least two directions;
• adding a predetermined correction value to said normalized value;
• weighting said interpolated pixel data in each of said at least two directions with said normalized value obtained by adding said correction value to said interpolated pixel data in each of said at least two directions and adding together the weighted interpolated pixel data in all of said at least two directions to generate interpolated pixel data;
• and
• generating an image based on said weighted interpolated pixel data.

A camera signal processing apparatus comprising:

• an interpolated pixel data generating means for interpolating pixel data in at least two directions based on a position of said pixel data and/or pixel data around said position, said pixel data being generated based on an imaging signal coming from a solid-state image sensor in which an imaging light enters through a color filter having a different spectral characteristic for each pixel, thereby separately generating interpolated pixel data in said at least two directions;
• a correlation detecting means for detecting a correlation value-indicative of a degree of correlation in each of said at least two directions of said interpolated pixel data generated by said interpolated pixel data generating means;
• and
• a weighting means for weighting said interpolated pixel data in each of said at least two directions generated by said interpolated pixel data generating means with said correlation value detected by said correlation value detecting means in each of said at least two directions and adding the weighted interpolated pixel data in said at least two directions to generate interpolated pixel data.

A camera signal processing method comprising the steps of:

• interpolating pixel data in at least two directions based on a position of said pixel data and/or pixel data around said position, said pixel-data being generated based on an imaging signal coming from a solid-state image sensor in which an imaging light enters through a color filter having a different spectral characteristic for each pixel, thereby separately generating interpolated pixel data in said at least two directions;
• detecting a correlation value indicative of a degree of correlation in each of said at least two directions of said interpolated pixel data;
• and
• weighting said interpolated pixel data in each of said at least two directions with said correlation value in each of said at least two directions and adding the weighted interpolated pixel data in said at least two directions to generate interpolated pixel data.

A camera signal processing apparatus comprising:

• an interpolated pixel data generating means for interpolating pixel data in at least two directions based on a position of said pixel data and/or pixel data around said position, said pixel data being generated based on an imaging signal coming from a solid-state image sensor in which an imaging light enters through a color filter having a different spectral characteristic for each pixel, thereby separately generating interpolated pixel data in said at least two directions;
• an edge processing means for computing a limit value for each of said interpolated pixel data based on pixel data around said each of interpolated pixel data generated by said interpolated pixel data generating means;
• a correlation detecting means for detecting a correlation value indicative of a degree of correlation in each of said at least two directions of said interpo lated pixel data generated by said interpolated pixel data generating means;
• a weighting means for weighting said interpolated pixel data in each of said at least two directions generated by said interpolated pixel data generating means with said correlation value detected by said correlation detecting means in each of said at least two directions and adding together the weighted interpolated pixel data in all of said at least two directions to generate interpolated pixel data;
• and
• an image generating means for generating an image based on said interpolated pixel data generated by said interpolated pixel data generating means;
• wherein said interpolated pixel data generating means generates interpolated pixel data for said pixel data based on said limit value computed by said edge processing means and said image generating means generates said image based on the generated interpolated pixel data.

A camera signal processing method comprising the steps of:

• interpolating pixel data in at least two directions based on a position of said pixel data and/or pixel data around said position, said pixel data being generated based on an imaging signal coming from a solid-state image sensor in which an imaging light enters through a color filter having a different spectral characteristic for each pixel, thereby separately generating interpolated pixel data in said at least two directions;
• computing a limit value for each of said interpolated pixel data based on pixel data around said each of interpolated pixel data;
• generating, based on said limit value, interpolated pixel data in each of said at least two directions based on said position of said pixel data and said pixel data around said position;
• detecting a correlation value indicative of a degree of correlation in each of said at least two directions of said interpolated pixel data;
• weighting said interpolated pixel data in each of said at least two directions with said correlation value of each of said at least two directions and adding together the weighted interpolated pixel data in all of said at least two directions to generate interpolated pixel data;
• and
• generating. an image based on the weighted interpolated pixel data.

A camera signal processing apparatus comprising:

• an interpolated pixel data generating means for interpolating pixel data in at least two directions based on a position of said pixel data and/or pixel data around said position, said pixel data being generated based on an imaging signal coming from a solid-state image sensor in which an imaging light enters through a color filter having a different spectral characteristic for each pixel, thereby separately generating interpolated pixel data in said at least two directions;
• a correlation detecting means for detecting a correlation value indicative of a degree of correlation in each of said at least two directions of said interpolated pixel data generated by said interpolated pixel data generating means;
• a noise canceling means for subtracting a predetermined value from said correlation value detected by said correlation value detecting means;
• a weighting means for weighting said interpolated pixel data in each of said at least two directions generated by said interpolated pixel data generating means with said correlation value detected by said correlation detecting means in each of said at least two directions and adding together the weighted interpolated pixel data in all of said at lea st two directions to generate interpolated pixel data;
• and
• an image generating means for generating an image based on said interpolated pixel data weighted by said weighting means.

A camera signal processing method comprising the steps of:

• interpolating pixel data in at least two directions based on a position of said pixel data and/or pixel data around said position, said pixel data being generated based on an imaging signal coming from a solid-state image sensor in which an imaging light enters through a color filter having a different spectral characteristic for each pixel, thereby separately generating interpolated pixel data in said at least two directions;
• detecting a correlation value indicative of a degree of correlation in each of said at least two directions of said interpolated pixel data;
• subtracting a predetermined value from said correlation value;
• and
• weighting said interpolated pixel data in each of said at least two directions with the subtracted correlation value in each of said at least two directions to generate interpolated pixel data obtained by adding together the weighted interpolated pixel data in all of said at least two directions.

A camera signal processing apparatus comprising:

• an interpolated pixel data generating means for interpolating pixel data in at least two directions based on a position of said pixel data and/or pixel data around said position, said pixel data being generated based on an imaging signal coming from a solid-state image sensor in which an imaging light enters through a color filter having a different spectral characteristic for each pixel, thereby separately generating interpolated pixel data in said at least two directions;
• a correlation detecting means for detecting a correlation value indicative of a degree of correlation in each of said at least two directions of said interpolated pixel data generated by said interpolated pixel data generating means;
• an offset means for adding a predetermined value to the correlation value detected by said correlation detecting means in each of said at least two directions;
• a weighting means for weighting said interpolated pixel data generated by said interpolated pixel data generating means in each of said at least two directions with the correlation value added by said offset means in each of said at least two directions and adding together the weighted interpolated pixel data in all of said at least two directions to generate interpolated pixel data;
• and
• an image generating means for generating an image based on said interpolated pixel data weighted by said weighting means.

A camera signal processing method comprising the steps of:

• interpolating pixel data in at least two directions based on a position of said pixel data and/or pixel data around said position, said pixel data being generated based on an imaging signal coming from a solid-state image sensor in which an imaging light enters through a color filter having a different spectral characteristic for each pixel, thereby separately generating interpolated pixel data in said at least two directions;
• detecting a correlation value indicative of a degree of correlation in each of said at least two directions of said interpolated pixel data;
• adding a predetermined value to the correlation value in each of said at least two directions;
• weighting said interpolated pixel data in each of said at least two directions with the correlation value added with said predetermined value and adding together the weighted interpolated pixel data in all of said at least two directions to generate interpolated pixel data;
• and
• generating an image based on the weighted interpolated pixel data.

A camera signal processing apparatus comprising:

• an interpolated pixel data generating means for interpolating pixel data to be generated according to a signal coming from a solid-state image sensor in which a light enters through a color filter having a different spectral characteristic for each pixel to provide interpolated pixel data based on a position of said pixel data and/or pixel data around said position;
• a correlation detecting means for detecting a correlation value for indicating a degree of correlation between a horizontal direction and a vertical direction of said interpolated pixel data generated by said interpolated pixel data generating means to weight said interpolated pixel data;
• and
• an image generating means for generating an image based on interpolated pixel data obtained by weighting said interpolated pixel data generated by said interpolated pixel data generating means with said correlation value detected by said correlation detecting means;
• wherein said correlation detecting means uses only pixel data indicative of a predetermined color in pixel data detected by said solid-state image sensor to detect a correlation value for interpolated pixel data indicative of said predetermined color and a correlation value for interpolated pixel data indicative of a color other than said predetermined color.

A camera signal processing method comprising the steps of:

• interpolating pixel data to be generated according to a signal coming from a solid-state image sensor in which a light enters through a color filter having a different spectral characteristic for each pixel to provide interpolated pixel data based on a position of said pixel data and/or pixel data around said position;
• detecting a correlation value for interpolated pixel data indicative of a predetermined color and a correlation value for interpolated pixel data indicative of a color other than said predetermined color by using only pixel data indicative of said predetermined color;
• weighting said interpolated pixel data with said correlation value;
• and
• generating an image based on the weighted interpolated pixel data.

A camera signal processing apparatus comprising:

• an interpolated pixel data generating means for interpolating pixel data in at least two directions based on a position of said pixel data and/or pixel data around said position, said pixel data being generated based on an imaging signal coming from a solid-state image sensor in which an imaging light enters through a color filter having a different spectral characteristic for each pixel, thereby separately generating interpolated pixel data in said at least two directions;
• a correlation detecting means for detecting a correlation value indicative of a degree of correlation in each of said at least two directions of said interpolated pixel data generated by said interpolated pixel data generating means;
• an emphasis/deemphasis means for performing control whether said interpolated pixel data is to be generated by emphasizing the correlation depending on said correlation value detected by said correlation detecting means in each of said at least two directions;
• a weighting means for weighting said interpolated pixel data in each of said at least two directions generated by said interpolated pixel data generating means with the correlation value controlled by said emphasis/deemphasis means in each of said at least two directions and adding together the weighted interpolated pixel data in all of said at least two directions to generate interpolated pixel data;
• and
• an image generating means for generating an image based on said interpolated pixel data weighted by said weighting means.

A camera signal processing method comprising the steps of:

• interpolating pixel data in at least two directions based on a position of said pixel data and/or pixel data around said position, said pixel data being generated based on an imaging signal coming from a solid-state image sensor in which an imaging light enters through a color filter having a different spectral characteristic for each pixel, thereby separately generating interpolated pixel data in said at least two directions;
• detecting a correlation value indicative of a degree of correlation in each of said at least two directions of said interpolated pixel data;
• performing control whether said correlation is to be emphasized depending on said correlation value in each of said at least two directions;
• weighting said interpolated pixel data in each of said at least two directions with the correlation value in each of said at least two directions of which degree of correlation emphasis is controlled and adding together the weighted interpolated pixel data in all of said at least two directions to generate interpolated pixel data;
• and
• generating an image based on said weighted interpolated pixel data.

A camera signal processing apparatus comprising:

• an interpolated pixel data generating means for interpolating pixel data in at least two directions based on a position of said pixel data and/or pixel data around said position, said pixel data being generated based on an imaging signal coming from a solid-state image sensor in which an imaging light enters through a color filter having a different spectral characteristic for each pixel, thereby separately generating interpolated pixel data in said at least two directions;
• a correlation detecting means for detecting a correlation value indicative of a degree of correlation in each of said at least two directions of said interpolated pixel data generated by said interpolated pixel data generating means;
• a color-difference signal detecting means for detecting a color-difference signal of each of said interpolated pixel data in each of said at least two directions generated by said interpolated pixel data generating means and interpolated pixel data added with said correlation value detected by said correlation detecting means in each of said at least two directions;
• a selecting means for selecting a smallest one of the color-difference signal of said interpolated pixel data in each of said at least two directions and the color-difference signal of the interpolated pixel data computed by use of said correlation value in each of said at least two directions;
• and
• an image generating means for generating an image based on the interpolated pixel data selected by said selecting means.

A camera signal processing method comprising the steps of:

• interpolating pixel data in at least two directions based on a position of said pixel data and/or pixel data around said position, said pixel data being generated based on an imaging signal coming from a solid-state image sensor in which an imaging light enters through a color-filter having a different spectral characteristic for each pixel, thereby separately generating interpolated pixel data in said at least two directions;
• detecting a correlation value indicative of a degree of correlation in each of said at least two directions of said interpolated pixel data;
• detecting a color-difference signal of each of said interpolated pixel data in each of said at least two directions and interpolated pixel data added with said correlation value in each of said at least two directions;
• selecting a smallest one of the color-difference signal of said interpolated pixel data in each of said at least two directions and the color-difference signal of the interpolated pixel data computed by use of said correlation value in each of said at least two directions;
• and
• generating an image based on the selected interpolated pixel data.