matlab - Java rgb2 gray it's to dark -


i don't can convert exactely rgb image gray image..

my final image it's dark, , affects work.

i use code:

public static bufferedimage rgb2gray(bufferedimage bi)//converter {     int heightlimit = bi.getheight();     int widthlimit = bi.gettilewidth();      bufferedimage converted = new bufferedimage(widthlimit, heightlimit, bufferedimage.type_byte_gray);      (int height = 0; height < heightlimit; height++) {         (int width = 0; width < widthlimit; width++) {             color c = new color(bi.getrgb(width, height) & 0x00fffff);             int newred = (int) ((0.2989f * c.getred()) * 1.45);//0.2989f             int newgreen = (int) ((0.5870f * c.getgreen()) * 1.45);//0.5870f             int newblue = (int) ((0.1140f * c.getblue()) * 1.45);             int rooffset = newred + newgreen + newblue;             converted.setrgb(width, height, rooffset);         }     }     return converted; }

what wrong?

in matlab result it's perfect, code in java poor.

i not sure why works in matlab , not in java - except perhaps color representation not handled same way in both platforms (but that's speculating). however, there way want - doesn't answer specific question ("what's wrong?"), should doing hoping do:

how desaturate bufferedimage in java?


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