Image signal interpolating apparatus

An apparatus for converting a first image signal having a first resolution into a second image signal having a second resolution greater than the first resolution by producing pixels of the second image signal in accordance with pixels of the first image signal, said apparatus comprising;

• means for detecting an amount of a characteristic near a picture element of the second image signal to be produced using picture elements of the first image signal near the picture element to be produced;
• means for selecting surrounding picture elements corresponding to the detected amount of the characteristic, the surrounding picture elements of the first image signal being adjacent to the picture element of the second image signal to be produced;
• means for determining a class corresponding to the picture element to be produced in accordance with the selected surrounding picture elements;
• means for generating a set of predicted coefficients from the determined class and a reference image signal having the second resolution;
• and
• means for producing the picture element of the second image signal to be produced in accordance with the set of predicted coefficients.

An apparatus for converting a first image signal into a second image signal having a greater resolution than the first digital signal by producing pixels of the second image signal in accordance with the first image signal, said apparatus comprising:

• means for detecting an amount of a characteristic near a picture element of the second image signal to be produced using picture elements of the first image signal near the picture element to be produced;
• means for selecting surrounding picture elements corresponding to the detected amount of the characteristic, the surrounding picture elements of the first image signal being adjacent to the picture element of the second image signal to be produced;
• means for determining a class corresponding to the picture element to be produced in accordance with the selected surrounding picture elements;
• means for generating a representative value from the determined class and a reference signal having the second resolution;
• and
• means for producing the picture element of the second image signal to be produced in accordance with the representative value.

A method for converting a first image signal having a first resolution into a second image signal having a second resolution greater than the first resolution by producing pixels of the second image signal in accordance with pixels of the first image signal, said method comprising the steps of:

• detecting an amount of a characteristic near a picture element of the second image signal to be produced using picture elements of the first image signal near the picture element to be produced;
• selecting surrounding picture elements corresponding to the detected amount of the characteristic, the surrounding picture elements of the first image signal being adjacent to the picture element of the second image signal to be produced;
• determining a class corresponding to the picture element to be produced in accordance with the selected surrounding picture elements;
• generating predicted data from the determined class and a reference image signal having the second resolution;
• and
• producing the picture element of the second image signal to be produced in accordance with the predicted data.

A method for converting a first image signal having a first resolution into a second image signal having a second resolution greater than the first resolution by producing pixels of the second image signal in accordance with pixels of the first image signal, said method comprising the steps of:

• detecting an amount of a characteristic near a picture element of the second image signal to be produced using picture elements of the first image signal near the picture element to be produced;
• selecting surrounding picture elements corresponding to the detected amount of the characteristic, the surrounding picture elements of the first image signal being adjacent to the picture element of the second image signal to be produced;
• determining a class corresponding to the picture element to be produced in accordance with the selected surrounding picture elements;
• generating a set of predicted coefficients from the determined class and a reference image signal having the second resolution;
• and
• producing the picture element of the second image signal to be produced in accordance with the set of a plurality of classes.

A method for converting a first image signal into a second image signal having a resolution greater than a resolution of the first image signal by producing pixels of the second image signal in accordance with the first image signal, said method comprising steps of:

• detecting an amount of a characteristic near a picture element of the second image signal to be produced using picture elements of the first image signal near the picture element to be produced;
• selecting surrounding picture elements corresponding to the detected amount of the characteristic, the surrounding picture elements of the first image signal being adjacent to the picture element of the second image signal to be produced;
• determining a class corresponding to the picture element to be produced in accordance with the selected surrounding picture elements;
• generating a representative value from the determined class and a reference signal having the second resolution;
• and
• producing the picture element of the second image signal to be produced in accordance with the representative value.