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กระทู้ #2442 [Java] (จาก IP: 125.26.182.105)
แปลงฺBufferedImageให้ไปเป็นฺค่าBinaryยังไงอ่ะครับพี่ช่วยหน่อยนะครับ
ตอนนี้ผมทำProject เกี่ยวกับ ImageProcessing อยู่อ่ะครับต้องการที่จะแปลงค่ารูปภาพให้ไปอยู่ในฐานสองเพื่อจะเอาค่าไปคำนวณด้านต่างๆเช่น หาค่า Histogram อะไรประมาณนี้อ่ะครับพี่ช่วยผมหน่อยนะครับ ขอบคุณมากครับ
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| จากคุณ
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Nut / unji_nut@hotmail.com [2009-01-19 01:11:52]
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ความคิดเห็น #27299 (จาก IP: 125.26.182.105)
| ลืมไปครับขอเป็น JAVA นะครับ |
| จากคุณ
:
Nut / unji_nut@hotmail.com [2009-01-19 01:13:28]
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ความคิดเห็น #27300 (จาก IP: 202.142.217.162)
/**Converts the colors in the BufferedImage to their nearest color in
* the colorPallet using a modified Euclidean Distance. The user can specify
* whether Floyd-Steinberg dithering should occur during this process.
* At the end of this method the image will have only those colors present
* in the given color pallet.
* @param image the image to posterize
* @param colorPallet the argb values of the colors in your color pallet
* @param dither specifyes whether to use dithering during the posterization
* process.
*/
public static void posterize(BufferedImage image, int[] colorPallet, boolean dither) {
//cache the color components of each color in the pallet. This
//is because these are used often in the lifetime of the for loop
int[][] cpComp= new int[colorPallet.length][3];
for(int k = 0; k < colorPallet.length; k++) {
cpComp[k][0] = red(colorPallet[k]);
cpComp[k][1] = green(colorPallet[k]);
cpComp[k][2] = blue(colorPallet[k]);
}
for(int y = 0; y < image.getHeight(); y++) {
for(int x = 0; x < image.getWidth(); x++)
{
int pixel = image.getRGB(x,y);
//the color components of the pixel.
int pixelR = red(pixel); int pixelG = green(pixel); int pixelB = blue(pixel);
//find the closest color in the colorPallet to the pixel
int minimumDistance = 255*255 + 255*255 + 255*255 + 1;
int ncIndex = -1; //index of the nearest color in the color pallet
for (int j = 0; j < colorPallet.length; j++) {
int rDiff = pixelR - cpComp[j][0];
int gDiff = pixelG - cpComp[j][1];
int bDiff = pixelB - cpComp[j][2];
int distance = (int) (rDiff * rDiff * .299 +
gDiff * gDiff * .587 +
bDiff * bDiff * .114);
if (distance < minimumDistance) {
minimumDistance = distance;
ncIndex = j;
}
}
//set the current pixel to the nearest color
image.setRGB(x, y, colorPallet[ncIndex]);
if(!dither) continue;
//error distribution to the surrouding pixels
for(int i = 0; i < 4; i++) {
int xCoor = i==0?x+1:
i==1?x-1:
i==2?x:
x+1;
int yCoor = i==0?y:y+1;
if(xCoor < 0 || xCoor >= image.getWidth() || yCoor >= image.getHeight()) continue;
double factor = i==0?7.0/16:
i==1?3.0/16:
i==2?5.0/16:
1.0/16;
int p = image.getRGB(xCoor,yCoor);
int newRed = (int) Math.round(red(p) + factor * (pixelR - cpComp[ncIndex][0]));
int newGreen = (int) Math.round(green(p) + factor* (pixelG - cpComp[ncIndex][1]));
int newBlue = (int) Math.round(blue(p)+ factor* (pixelB - cpComp[ncIndex][2]));
if(newRed < 0) newRed = 0; if(newRed > 255) newRed = 255;
if(newGreen < 0) newGreen = 0; if(newGreen > 255) newGreen = 255;
if(newBlue < 0) newBlue = 0; if(newBlue > 255) newBlue = 255;
image.setRGB(xCoor, yCoor, (255<< 24)+ (newRed << 16) + (newGreen << 8) + newBlue);
}
}
}
}
/**Convenience method that returns the red component in an argb integer.*/
public static int red(int argb) {return (argb >> 16) & 0xff;}
/**Convenience method that returns the green component in an argb integer.*/
public static int green(int argb) {return (argb >> 8) & 0xff;}
/**Convenience method that returns the blue component in an argb integer.*/
public static int blue(int argb) {return (argb ) & 0xff;} |
| จากคุณ
:
sup98 [2009-01-19 10:20:03]
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ความคิดเห็น #27301 (จาก IP: 202.142.217.162)
BufferedImage image = ImageIO.read(...);
BufferedImage fgImage = //foreground image
new BufferedImage(image.getWidth(),image.getHeight(),
BufferedImage.TYPE_INT_RGB);
for(int x = 0; x < fgImage.getWidth(); x++) {
for(int y = 0; y < fgImage.getHeight(); y++) {
int rgbSrc = image.getRGB(x, y);
if(rgbSrc == rgbForeground) {
fgImage.setRGB(x,y,rgbForeground); //remain in color
}else{
int r = (rgbSrc>>16)&0xff;
int g = (rgbSrc>> 8)&0xff;
int b = (rgbSrc )&0xff;
int lum = (int) (.299 * r + .587 * g + .144 * b);
//set to grayscale
fgImage.setRGB(x,y,(255<<24)|(lum<<16)|(lum<<8)|lum);
}
}
} |
| จากคุณ
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sup98 [2009-01-19 10:21:46]
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ความคิดเห็น #27302 (จาก IP: 125.26.182.105)
| ขอบคุณมากครับพี่.... |
| จากคุณ
:
Nut / unji_nut@hotmail.com [2009-01-19 16:20:52]
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