Please ask how to set the parameters of PS constellation filter.

H, S and B are color, saturation and brightness.

What color does R G B stand for? 92 156 252 is light blue,

H: 135s: 240b: 167 This can only be adjusted in PS 3. Now the version has been replaced by%.

Quality standard of digital photos of entry-exit documents in People's Republic of China (PRC)

background color

Is it blue or white,

When taking photos with a blue background, you need to control the average background color to:

(

R=67

、

G= 142

、

take

2 19

)