resize image on read
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Nathan Jessurun
le 20 Oct 2019
Modifié(e) : Nathan Jessurun
le 20 Oct 2019
I am working with very high-resolution images, where reading in the image takes most of the processing time. Is there a more efficient method of reading a resized version of the image than X = imresize(imread('img.png'), ratio)?
The documentation for imread mentions a 'ReductionLevel' parameter, but it isn't present for my images. Moreover, it doesn't provide the same level of flexibility as imresize.
Note: I can't save a resized version of the image, since the resizing ratio changes depending on the algorithm and storage becomes an issue.
Thanks for the help!
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Image Analyst
le 20 Oct 2019
ReductionLevel is only an option for JPG images, not PNG images. 6000x8000 is not really that huge. How long does it ake to read in? You might look into the memmapfile() function.
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