Encoding the following file with 32x32 tiling produces jp2 image with artifact

[boxerab]

Encode the following TIF with the encoder settings

-i b2_mono.tif -o b2_mono.jp2 -OutFor jp2 -t 32,32

and the resulting jp2 image has an artifact on the right hand side of the image, about 15 pixels wide,
which corresponds to the width of the right-most tiles.

I also observed that the artifact is present for the default n=6 resolution levels, but not present
for n < 6. So, it looks like a tile of width 15 with 6 resolutions levels is not being encoded properly, probably due to LL0 having zero width.

I also observed that if I tried to do a single tile encode of a 303x179 image with n = 9,
encode fails, complaining that the number of resolutions is too high. So, in the 32x32 tile
case, it looks like the code can't handle n=6 for the boundary tiles, of width 15.

So, to be consistent, encoder should reject these settings, just like it rejects single tile encodings when n is too large.

b2_mono.zip

[boxerab]

Happy Holidays

[rouault]

Can no longer reproduce. Likely fixed per 73d1510