Question

我正在尝试skimage.io.imread()一张先前写入tempfile.TemporaryFile()的图片（比如一个tiff文件，具体而言）。但是，skimage抱怨说

   ValueError: Cannot determine type of file b'<_io.BufferedRandom name=6>'

我这样做是因为另一个程序将图像写入标准输出。我用subprocess.check_output收集它并将其写入临时文件，从而避免将图像保存到磁盘。

有谁知道如何实现这一目标，或者更好地了解如何将图像从stdout传输到python图像，最终被视为numpy.ndarray？

Answer 1

解决方案如下

clear
clc
close all

xyloObj = VideoReader('xylophone.mp4');

imageData = read(xyloObj);

%// Open writer object
writerObj = VideoWriter('NewVideo.avi');
open(writerObj);

%// Show 1st frame
hIm = imshow(imageData(:,:,:,1));
for k = 1:size(imageData,4)

    %// Change pixel values
    imageData(1:200,1:200,:,k) = uint8(0);

    %// Refresh cdata property. Faster than calling repetitevely imshow
    set(hIm,'CData',imageData(:,:,:,k));

    drawnow
    frame = getframe;
    %// Write to video file
    writeVideo(writerObj,frame);

end

close(writerObj);

或者，可以用with NamedTemporaryFile() as f: skimage.io.imread(f.name, plugin="tifffile")替换freeimage。之前我传递的是文件对象，但tifffile实际上想要一个文件名。

skimage imread from临时文件

1 个答案: