IMAGE PROCESSING APPARATUS, THRESHOLD MATRIX GENERATION DEVICE, CONTROL METHOD FOR THESE, RECORDING DEVICE, AND PROGRAM

• Main Authors: MORIBE MASAHIDE, OTANI RYOSUKE
• Format: Patent
• Language: English; Japanese
• Published: 17.01.2024
• Subjects: CORRECTION OF TYPOGRAPHICAL ERRORS; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; LINING MACHINES; PERFORMING OPERATIONS; PICTORIAL COMMUNICATION, e.g. TELEVISION; PRINTING; SELECTIVE PRINTING MECHANISMS; STAMPS; TRANSPORTING; TYPEWRITERS

To provide a technique to prevent the occurrence of moire, granularity, and the like due to overlapping of dots in a plurality of colors, in forming an image on a recording medium by using the dots in the plurality of colors.SOLUTION: An image processing apparatus receives input of a plurality of pieces of multi-valued data corresponding to a plurality of coloring materials, quantizes each of the plurality of pieces of multi-valued data, and generates a plurality of pieces of quantized data indicating recording or non-recording of dots in a recording medium with each of the plurality of coloring materials. Here, a plurality of dot patterns of the plurality of coloring materials recorded based on the plurality of generated quantized data have peaks in declination directions different from each other in the power spectrum of a frequency space, and have blue noise characteristics or green noise characteristics.SELECTED DRAWING: Figure 1 【課題】複数色のドットで記録媒体に画像を形成する際の、複数色のドットの重なりによるモアレや粒状性等の発生を抑制する技術を提供する。【解決手段】画像処理装置は、複数の色材に対応する複数の多値データを入力し、複数の多値データのそれぞれを量子化して、複数の色材のそれぞれによる記録媒体へのドットの記録または非記録を示す複数の量子化データを生成する。ここで、生成された複数の量子化データに基づいて記録される複数の色材の複数のドットパターンは、周波数空間のパワースペクトルにおいてそれぞれ異なる偏角方向にピークを有し、且つ、ブルーノイズ特性またはグリーンノイズ特性を有する。【選択図】 図１