if have layer1 and layer2 and layer3,backgroud is white,i want to Merge all layers to background.all layers is cmyk.
because layer is cmyk(0<=c,m,y,k<=100), below in black(k), Compare the color data of the different layer, in the same coordinate position,for example ,
A.layer1---c1 m1 y1 k1,layer2---c2 m2 y2 k2,layer1 and layer2 Merge to layer1
B.layer1---c1 m1 y1 k1,layer3---c3 m3 y3 k3,layer1 and layer3 Merge to layer1
C.layer1 and background multiply
D.finish
Merge arithmetic :
if k1>=k2 k1=k1+k2-2*k1*k2/100+k1*k1*k2/10000
else k1<k2 k1=k1+k2-2*k1*k2/100+k1*k2*k2/10000
Can edit by JavaScript? pls help me....thx