Method of generating image data, method of producing display, program, computer-readable storage medium, and display production system

A method of generating image data, comprising:

• acquiring first image data represented in two or more colors, the first image data comprises a plurality of pixels, wherein said acquiring comprises acquiring for each pixel of the plurality of pixels of the first image data, a tone value for each of the two or more colors;
• and
• based on the first image data, generating second image data comprising a plurality of pixels, wherein each pixel of the plurality of pixels of the second image data has a binarized tone value for each of the two or more colors, wherein
• the generating the second image data includes:
• selecting a first pixel from the plurality of pixels of the first image data;
• performing a first comparison of the tone value of the first pixel with a first threshold;
• if the first comparison shows that the tone value of the first pixel is greater than the first threshold, binarizing the tone value of the first pixel by a first binarization process;
• if the first comparison shows that the tone value of the first pixel is less or equal than the first threshold, performing a second comparison of the tone value of the first pixel with a second threshold smaller than the first threshold;
• if the second comparison shows that the tone value of the second pixel is smaller than the second threshold, binarizing the tone value of the first pixel by a second binarization process different from the first binarization process, and
• if the second comparison shows that the tone value of the second pixel is equal or greater than the second threshold, binarizing the tone value of the first pixel by a third binarization process different from the first binarization process and the second binarization process, wherein
• the first binarization process includes setting the tone value of the first pixel to a first tone value that is greater than the first threshold,
• the second binarization process includes:
• setting the tone value of the first pixel to a second tone value that is smaller than the second threshold;
• and
• distributing a value equivalent to the tone value of the first pixel to one or more second pixels of the plurality of pixels of the first image data different from the first pixel,
• the third binarization process includes:
• executing an adjustment process of subtracting a predetermined value from a tone value of one or more third pixels of the plurality of pixels of the first image data different from the first pixel and adding the predetermined value to the tone value of the first pixel;
• performing a third comparison of the tone value of the first pixel after the adjustment process with the first threshold;
• if the third comparison shows that the tone value of the first pixel after the adjustment process is more than the first threshold, setting the tone value of the first pixel to the first tone value;
• and
• if the third comparison shows showing that the tone value of the first pixel after the adjustment process is equal to or less than the first threshold, setting the tone value of the first pixel to the second threshold, wherein
• the predetermined value is 0 when the tone value of the one or more third pixels is equal to or less than the first threshold, and
• the predetermined value is a positive value that is smaller than a value obtained by subtracting the first threshold from the tone value of the one or more third pixels when the tone value of the one or more third pixels is greater than the first threshold.

A method of generating image data, comprising:

• acquiring first image data represented in two or more colors, the first image data comprises a plurality of pixels, wherein said acquiring comprises acquiring for each pixel of the plurality of pixels of the first image data, a tone value for each of the two or more colors;
• and
• based on the first image data, generating second image data comprising a plurality of pixels, wherein each pixel of the plurality of pixels of the second image data has a binarized tone value for each of the two or more colors, wherein
• the generating the second image data includes:
• selecting a first pixel from the plurality of pixels of the first image data;
• performing a first comparison of the tone value of the first pixel with a first threshold;
• if the first comparison shows that the tone value of the first pixel is greater than the first threshold, binarizing the tone value of the first pixel by a first binarization process;
• if the first comparison shows that the tone value of the first pixel is less or equal than the first threshold, performing a second comparison of the tone value of the first pixel with a second threshold smaller than the first threshold;
• if the second comparison shows that the tone value of the second pixel is smaller than the second threshold, binarizing the tone value of the first pixel by a second binarization process different from the first binarization process, and
• if the second comparison shows that the tone value of the second pixel is equal or greater than the second threshold, binarizing the tone value of the first pixel by a third binarization process different from the first binarization process and the second binarization process, and wherein the method further comprises
• before generation of the second image data, setting, for each color of the two or more colors, a magnitude of the first threshold and a magnitude of the second threshold to be used in generation of the second image, wherein
• said setting the magnitude of the first threshold and the magnitude of the second threshold to be used in generation of the second image data include:
• acquiring third image data corresponding to part of the first image data, the third image data comprises a plurality of pixels;
• for each combination of a plurality of magnitude combinations for the first threshold and of the second threshold, binarizing a tone value of each pixel of the plurality of pixels of the third image data by any of the first binarization process, the second binarization process, and the third binarization process to generate fourth image data comprising a plurality of pixels, each pixel of the plurality of pixels of the fourth image data having a binarized tone value;
• and
• setting the magnitude of the first threshold and the magnitude of the second threshold to be used in generation of the second image data to be a value of the first threshold and a value of the second threshold in a combination of the plurality of magnitude combinations, in which a summed value of differences in pixel between the third image data and the fourth image data is minimized.