问题描述
我想将操作 this.websocket.orders$
.pipe(
tap(orders => {
if (this.markers.length !== orders.length) this.resetMarkers(orders);
else this.updateMarkers(orders);
}),switchMapTo(
timer(X * 1000).pipe(() => {
// reset markers here
// timer gets reset on each new emitted event
})
)
)
.subscribe()
保存到一个新变量中。这是一张我要显示一定范围的图像，但是我不想使用imshow(im16,[WC-WW/2,WC+WW/2]);，我只想保存具有WC-WW /操作强度窗口一定范围的新图像。 2，WC + WW / 2。
我正在处理Matlab（png格式）的CT图像，并调整窗口宽度和窗口水平。
解决方法
imshow(im16,[WC-WW/2,WC+WW/2])的作用是将im16中强度低于WC-WW/2的每个像素变为黑色（0），将强度高于WC+WW/2的每个像素变为白色（255） ，然后重新缩放其余像素。
一种方法是：
im = imread('corn.tif',3); % your image goes here
low = 0.2*255; % lower intensity that you want to put to black (WC-WW/2)
high = 0.8*255; % upper intensity that you want to put to white (WC+WW/2)
im1 = double(im); % turn into double
idxlow = im1 <= low; % index of pixels that need to be turned to black
idxhigh = im1 >= high; % index of pixels that need to be turned to white
im1(idxlow) = 0; % black
im1(idxhigh) = 255; % white
im1(~idxlow & ~idxhigh) = im1(~idxlow & ~idxhigh) - min(im1(~idxlow & ~idxhigh),[],'all'); % rescale low values
im1(~idxlow & ~idxhigh) = im1(~idxlow & ~idxhigh).*255./max(im1(~idxlow & ~idxhigh),'all'); % rescale high values
im1 = uint8(im1); % turn back into uint8 (or your initial format)
只需检查：
figure
hold on
% Show the original image
subplot(1,3,1)
imshow(im)
title('Original')
% Show the original image reranged with imshow()
subplot(1,2)
imshow(im,[low,high])
title('Original scaled with imshow')
% Show the new reranged image
subplot(1,3)
imshow(im1)
title('New image')