Downsampling based display method and apparatus

A downsampling based display apparatus adapted for being inputted with an image including a plurality of pixels;

• the display apparatus comprising:
• a pixel theoretical value calculation unit, configured to obtain at least two pixels, which are neighboring with a to-be-calculated downsampling pixel in a target image, on each of at least two directions from the plurality of pixels of the input image to thereby obtain at least four first neighboring pixels, and calculate theoretical values of the at least four first neighboring pixels on the at least two directions;
• a weighted cubic interpolation calculation unit, configured to obtain at least four pixels, which are neighboring with the downsampling pixel, on each of at least two directions from the plurality of pixels of the input image to thereby obtain at least eight second neighboring pixels, and build a weighted cubic interpolation calculation model for calculating the downsampling pixel in advance according to the at least eight second neighboring pixels;
• a weight coefficient calculation unit, configured to obtain errors of the theoretical values of the at least four first neighboring pixels and a corresponding original value, and determines weight coefficients for calculating the downsampling pixel according to the errors;
• and
• a downsampling pixel calculation unit, configured to select a corresponding weighted cubic interpolation calculation model according to the weight coefficients to calculate an estimation value of the downsampling pixel;
• wherein the display apparatus calculates a corresponding estimation value of each downsampling pixel in the target image, and thereby a downsampling processed image is obtained and is displayed on the downsampling based display apparatus.

A downsampling based display method comprising:

• obtaining an input image, wherein the input image comprises a plurality of pixels;
• obtaining at least four pixels, which are neighboring with a to-be-calculated downsampling pixel in a target image, on each of at least two directions from the plurality of pixels of the input image to obtain at least eight second neighboring pixels, and building a weighted cubic interpolation calculation model according to the at least eight second neighboring pixels;
• obtaining at least two pixels, which are neighboring with the downsampling pixel, on each of at least two directions from the plurality of pixels of the input image to obtain at least four first neighboring pixels, and calculating theoretical values of the at least four first neighboring pixels on the at least two directions;
• obtaining errors between the theoretical values of the at least four first neighboring pixels and a corresponding original value, and determining weight coefficients for calculating the downsampling pixel according to the errors;
• calculating an estimation value of the downsampling pixel according to the weight coefficients and the weighted cubic interpolation calculation model, using the above steps to calculate corresponding estimation values of the other downsampling pixels in the target image, and thereby obtaining a downsampling processed image;
• and
• displaying the downsampling processed image.