Pyrdown algorithm doesn´t complete the second interation DMA

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1

Hi, I am using pynqZ1 to create image pyramids using the function xf::pyrdown. My algorithm is working and the output is fine, it changes the image from 1024x1024 pixels to 512x512. But if I want to convert the 512x512 image again to 256x256 the output is this:

image
image1366×768 185 KB

The bottom part of the output image is not right, and the DMA get stuck in dma.recvchannel.wait()

Any idea why is this happening? thanks

2

Maybe you want to double check if the image you transfer and receive has the correct size. Usually the HLS IP is only capable of working on a fixed size; if you want to change the input/output size, you probably need to reimplement it with a different set of parameter.