Method to up-sample frequency rich images without significant loss of image sharpness

A filter for up-sampling image data, comprising:

• a two tap filter coupled to receive the image data to preserve high frequency content of the image data, the two tap filter having a first and a second coefficient, the first coefficient is
• (cos((x)(π)/2)) (cos((x)(π)/2)),
• the second coefficient is
• (sin((x)(π)/2)) (sin((x)(π)/2)),
• the two tap filter to produce an output image that is equal to a sum of a product of the first coefficient times the image data and a product of the second coefficient times a time-delayed image data.

A filter for up-sampling image data, comprising:

• a means for sampling the image data having two taps separated in spatial frequency by one predetermined time period;
• a multiplying means coupled to each of the taps to multiply the image data of each tap by a coefficient;
• and
• a summing means coupled to the multiplying means for summing the outputs thereof in such a manner as to preserve high frequency content of the image data.

A flat panel display unit including filter for up-sampling image data, comprising:

• a two tap filter coupled to receive the image data to preserve high frequency content of the image data, the two tap filter having a first and a second coefficient, the first coefficient is
• (cos((x)(π)/2)) (cos((x)(π)/2)),
• the second coefficient is
• (sin((x)(π)/2)) (sin((x)(π)/2)),
• the two tap filter to produce an output image that is equal to a sum of a product of the first coefficient times the image data and a product of the second coefficient times a time-delayed image data.

A flat panel display unit including filter for up-sampling image data, comprising:

• a means for sampling the image data with two taps separated in spatial frequency by one predetermined time period;
• a multiplying means coupled to each of the taps to multiply the image data of each tap by a coefficient;
• and
• a summing means coupled to the multiplying means for summing the outputs thereof in such a manner as to preserve high frequency content of the image data.

A real-time image processing method comprising the steps of:

• a. multiplying the image input data by a first coefficient C0 in a first multiplier to generate a first product;
• b. delaying the image input data by a first predetermined time delay;
• c. multiplying the delayed image input data by a second coefficient C1 in a second multiplier to generate a second product;
• and
• d. summing the first and second product of the first and second multipliers to provide image output data, wherein the output node provides the image output data comprising a plurality of output pixels outpix(j) equal to:
• outpix(j)=C0*inpix(i)+C1*inpix(i−1)
• where outpix(j) represents an output pixel at the jthe position, inpix(i) represents the input pixel of the image input data at the ith position, inpix(i-l) represents an input pixel of the time delayed image input data, i is an integer equal to 0, 1, 2 . . . n where n is the number of pixels in the image input data, j is an integer equal to 1,2,3, . . . m where m is the number of pixels in the image data.