如何将 DeviceGray 颜色转换为 rgb？

Question

I read pdf structure using itext 7.0.4 library and when I read stream I found DeviceGray color in following form:

1 g

and how can I convert it to RGB format?

Answer 1

float[] hsv = color.getColorValue();
int rgb = Color.HSBtoRGB(hsv[0], hsv[1], hsv[2]);
Color target = new Color(rgb);

where color is instance of com.itextpdf.kernel.color.DeviceGray