Method for lowering black content in digital image

[0101] please see Figure 10 The original pixel 31a corresponds to four pixels 41j~41n to be converted, and its color information can be found in Figure 11 example.

[0102] The color information of the 2 pixels to be transformed in 41j and 41n is: R=F and G=F, and B is equal to the B value of the original pixel 31a;

[0103] The color information of the two pixels 41k and 41m to be converted is: B=F, and the R value and G value are equal to the R value and G value of the original pixel 31a.

[0104] That is, for the RGB value of the original pixel 31a, two of the to-be-transformed pixels present the B value of the original pixel 31a, and the other two to-be-converted pixels present the R and G values ​​of the original pixel 31a. Since at least one color information of each of the pixels 41j-41n to be converted has a full value (equal to F), there will be no K value when printing (the printer will convert to CMYK system). Figure 11 The embodiment is to ensure that the K valu

[0108] please see Figure 10 The original pixel 31a corresponds to four pixels 41j~41n to be converted, and its color information can be found in Figure 12 example.

[0109] The color information of the two pixels to be transformed in 41j and 41n is: G=F and B=F, and R is equal to the R value of the original pixel 31a;

[0110] The color information of the two pixels 41k and 41m to be transformed is: R=F, and the G value and B value are equal to the G value and B value of the original pixel 31a.

[0111] That is, for the RGB value of the original pixel 31a, the two to-be-transformed pixels present the R value of the original pixel 31a, while the other two to-be-converted pixels present the G and B values ​​of the original pixel 31a. Since at least one color information of each of the pixels 41j-41n to be converted is full (equal to F), no K value will appear when printing (the printer will convert to CMYK system). Figure 12 The embodiment is to ensure that the K value is rem

[0115] please see Figure 10 The original pixel 31a corresponds to four pixels to be converted 41j~41n, and its color information can be found in Figure 13 example.

[0116] The color information of the 2 pixels to be transformed in 41j and 41n is: B=F and R=F, and R is equal to the G value of the original pixel 31a;

[0117] The color information of the two pixels 41k and 41m to be transformed is: G=F, and the B value and R value are equal to the B value and R value of the original pixel 31a.

[0118] That is, for the RGB value of the original pixel 31a, the G value of the original pixel 31a is represented by the two pixels to be converted, and the B value and R value of the original pixel 31a are represented by the other two pixels to be converted. Since at least one color information in each of the pixels 41j-41n to be converted is full (equal to F), there will be no K value when printing (the printer will convert to CMYK system). Figure 12 The embodiment is to ensure that