IMAGE PROCESSING DEVICE, IMAGE PROCESSING METHOD AND PROGRAM

• Main Author: NISHIKAWA NAOYUKI
• Format: Patent
• Language: English; Japanese
• Published: 15.05.2023
• Subjects: CALCULATING; COMPUTING; CORRECTION OF TYPOGRAPHICAL ERRORS; COUNTING; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; IMAGE DATA PROCESSING OR GENERATION, IN GENERAL; LINING MACHINES; PERFORMING OPERATIONS; PHYSICS; PICTORIAL COMMUNICATION, e.g. TELEVISION; PRINTING; SELECTIVE PRINTING MECHANISMS; STAMPS; TRANSPORTING; TYPEWRITERS

To perform a color conversion process efficiently using hardware resources.SOLUTION: Axis setting for deriving a point where a conversion target point ti and one of color components match is performed using a reference table. The output values of points Q1, Q2, Q3, Q4 between grid points where the conversion target point ti and the value in R axis direction are the same, are acquired from the reference table. Linear interpolation in a G axis direction is carried out using the acquired output values of Q1-Q4, and the output values of interpolation points R1, R2 between the points Q1-Q4 where the conversion target point ti and the value in G axis direction are the same are calculated. Linear interpolation in a B axis direction is carried out using the acquired output values of interpolation points R1, R2, and the output value of an interpolation point S between the interpolation points R1, R2 where the conversion target point ti and the value in B axis direction are the same, i.e., the conversion target point ti, is calculated.SELECTED DRAWING: Figure 6 【課題】ハードウェア資源を効率良く利用して色変換処理を行うこと。【解決手段】参照テーブルを用いて、変換対象点ｔｉと色成分の１つが一致する点を導出する軸の設定を行う。参照テーブルから変換対象点ｔｉとＲ軸方向の値が同じ、グリッド点間の点Ｑ１、Ｑ２，Ｑ３，Ｑ４の出力値を取得する。取得した点Ｑ１～Ｑ４の出力値を用いてＧ軸方向の線形補間演算を実施し、変換対象点ｔｉとＧ軸方向の値が同じ、点Ｑ１～Ｑ４の間の補間点Ｒ１，Ｒ２の出力値を算出する。取得した補間点Ｒ１，Ｒ２の出力値を用いてＢ軸方向の線形補間演算を実施し、変換対象点ｔｉとＢ軸方向の値が同じ、補間点Ｒ１，Ｒ２の間の補間点Ｓ、すなわち変換対象点ｔｉの出力値を算出する。【選択図】図６