在java中按2倍调整图像大小
这就是我到目前为止所拥有的,但不知道现在该做什么?它使图片更大,但图片中有很多空间。如何复制像素以填充孔在java中按2倍调整图像大小,java,image,pixel,image-resizing,Java,Image,Pixel,Image Resizing,这就是我到目前为止所拥有的,但不知道现在该做什么?它使图片更大,但图片中有很多空间。如何复制像素以填充孔 public Picture enlarge() { Picture enlarged = new Picture(getWidth() * 2, getHeight() * 2); for (int x = 0; x < getWidth(); x++) { for (int y = 0; y < getHeight(); y++) { Pixel orig
public Picture enlarge()
{
Picture enlarged = new Picture(getWidth() * 2, getHeight() * 2);
for (int x = 0; x < getWidth(); x++)
{
for (int y = 0; y < getHeight(); y++)
{
Pixel orig = getPixel(x,y);
Pixel enlargedPix = enlarged.getPixel(x*2,y*2);
Pixel enlargedPix2 = enlarged. getPixel(x,y);
enlargedPix.setColor(orig.getColor());
enlargedPix2.setColor(orig.getColor());
}
}
return enlarged;
}
公共图片放大()
{
图片放大=新图片(getWidth()*2,getHeight()*2);
对于(int x=0;x
新图片中存在间隙的原因是,您仅为每个原始像素设置一次像素,而您必须为原始图像的每个像素设置4个像素(即2x2),因为它是原始图像的两倍大。如果将图像放大两倍,并且不使用插值。然后,原始图像的像素(x,y)
应映射到像素(2*x,2*y)
,(2*x,2*y+1)
,(2*x+1,2*y)
和(2*x+1,2*y+1)
。因此,算法应该是:
Picture enlarged = new Picture(getWidth() * 2, getHeight() * 2);
for (int x = 0; x < getWidth(); x++) {
for (int y = 0; y < getHeight(); y++) {
Pixel orig = getPixel(x,y);
for(int x2 = 2*x; x2 < 2*x+2; x2++) {
for(int y2 = 2*y; y2 < 2*y+2; y2++) {
enlarged.getPixel(x2,y2).setColor(orig.getColor());
}
}
}
}
为什么要使用
放大像素2
?我试图制作第二组像素来填充孔
Picture enlarged = new Picture(getWidth() * mag, getHeight() * mag);
for (int x = 0; x < getWidth(); x++) {
for (int y = 0; y < getHeight(); y++) {
Pixel orig = getPixel(x,y);
for(int x2 = mag*x; x2 < mag*x+mag; x2++) {
for(int y2 = mag*y; y2 < mag*y+mag; y2++) {
enlarged.getPixel(x2,y2).setColor(orig.getColor());
}
}
}
}