Netvips.Image.Insert is very slow with many imaegs #4670
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wangmuzhi126
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Hi @wangmuzhi126, For an M by N array of tiles, you are making a pipeline of (M * N) elements: For large M and N, this will get very slow! A simple fix is to use This will join an array of images in a single operation. |
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The two images have a certain amount of overlap, but arrayjoin cannot handle joining them based on a specified pixel overlap. |
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You can crop before calling tiles = [pyvips.Image.new_from_file(filename[x + y * tiles_across], access="sequential")
.crop(10, 10, 1000, 1000)
for y in range(0, tiles_across)
for x in range (0, tiles_down)]
result = tiles.arrayjoin(across=tiles_across) |
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When i insert many images into a bigimage its running slow, how can i optimize the program running speed? The code as follows:
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