[英]imagej always shows black images
for an assignment I have to display an image using imagej in java. 对于作业,我必须在Java中使用imagej显示图像。 So I used the following code:
所以我用下面的代码:
FloatProcessor abc=new FloatProcessor(imageSizeX,imageSizeY);
for (int i=0;i<imageSizeX;i++){
for(int j=0;j<imageSizeY;j++){
abc.putPixel(i, j, 100);
}
}
ImagePlus im=new ImagePlus("test",abc);
im.show();
but the Image I get is always completely black. 但是我得到的图像始终是全黑的。 Can you tell me what the mistake is?
你能告诉我错误是什么吗? It should at least be white if the value was 0 shouldn't it?
如果值为0,应该至少是白色,不是吗? (FYI: imageSizeX=imageSizeY=256)
(仅供参考:imageSizeX = imageSizeY = 256)
.putPixel
uses the conversion Float.intBitsToFloat
. .putPixel
使用转换Float.intBitsToFloat
。
If you want a direct access to the pixels, you can use setf(int x, int y, float value)
. 如果要直接访问像素,可以使用
setf(int x, int y, float value)
。
Moreover, if you already have the pixels into an array, you can use the constructors to immediately set the pixel values FloatProcessor(int width, int height, int[] pixels)
. 而且,如果已经将像素放入数组中,则可以使用构造函数立即设置像素值
FloatProcessor(int width, int height, int[] pixels)
。
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