Convert RGB values to Integer

Question

So in a BufferedImage  you receive a single integer that has the RGB values represented in it  So far I use the following to get the RGB values from it      rgbs is an array of integers  every single integer represents the    RGB values combined in some way int r    int    Math pow 256 3    rgbs k     65536   int g    int     Math pow 256 3    rgbs k     256     256    int b    int    Math pow 256 3    rgbs k     256     And so far  it works   What I need to do is figure out how to get an integer so I can use BufferedImage setRGB    because that takes the same type of data it gave me

User · Accepted Answer

I think the code is something like   int rgb   red  rgb    rgb  lt  lt  8    green  rgb    rgb  lt  lt  8    blue    Also  I believe you can get the individual values using   int red    rgb  gt  gt  16   amp  0xFF  int green    rgb  gt  gt  8   amp  0xFF  int blue   rgb  amp  0xFF

User · Answer

int rgb     r amp 0x0ff  lt  lt 16    g amp 0x0ff  lt  lt 8   b amp 0x0ff     If you know that your r  g  and b values are never   255 or  lt  0 you don t need the  amp 0x0ff  Additionaly   int red    rgb gt  gt 16  amp 0x0ff  int green  rgb gt  gt 8   amp 0x0ff  int blue   rgb      amp 0x0ff    No need for multipling

User · Answer

To get individual colour values you can use Color like following for pixel x y    import java awt Color  import java awt image BufferedImage   Color c   new Color buffOriginalImage getRGB x y    int red   c getRed    int green   c getGreen    int blue   c getBlue      The above will give you the integer values of Red  Green and Blue in range of 0 to 255   To set the values from RGB you can do so by   Color myColour   new Color red  green  blue   int rgb   myColour getRGB       Change the pixel at  x y  ti rgb value image setRGB x  y  rgb     Please be advised that the above changes the value of a single pixel  So if you need to change the value entire image you may need to iterate over the image using two for loops

User · Answer

int rgb   new Color r  g  b  getRGB

User · Answer

if r  g  b   3 integer values from 0 to 255 for each color  then  rgb   65536   r   256   g   b    the single rgb value is the composite value of r g b combined for a total of 16777216 possible shades

[java] Convert RGB values to Integer

Examples related to java

Examples related to bufferedimage