Coudl you please explain this settings at .config file?

  • I'd like to understand better a few settings at the config file:

    ---> tilesize=4000
    ---> levels=1
    ---> maxsize=8000
    ---> maxcubesize=2200

    ---> jpegsubsamp=422
    ---> jpegoptimize=true

  • Hi,

    Zitat

    tilesize=4000

    this means the max. size of the tiles is 4000x4000,
    together with the setting - maxcubesize=2200 - only 1 tile per cube face will be generated,

    Zitat

    levels=1

    only 1 resolution level will be generated (no multi-resolution)

    Zitat

    maxsize=8000

    the maximum size of a spherical/cylindrical image,
    a larger file will be downscaled to that size,

    when a cubical pano (or a converted cubical pano) was used this setting will be ignored at the maxcubesize setting will be used,


    Zitat

    maxcubesize=2200

    the maximum size for a cubeface side (2200x2200)
    larger images will be downscaled,

    Zitat

    jpegsubsamp=422

    the used jpeg color sub-sampling setting,
    see here for details - http://en.wikipedia.org/wiki/Chroma_subsampling

    Zitat

    jpegoptimize=true

    the jpeg compression uses two kinds of compression - first a lossy quantizing, and than a lossless compression of the quantized data, and second part, the lossless compression was done by a huffman compression,
    and this huffman compression uses internally a table of codes for compression,

    by default this codes are predefined which results in a good but not optimal compression,
    to get the best possible compression this codes can be optimized by analyzing the complete quantized data of the image,
    but to be able to analyze the complete image the whole image must be stored in memory,
    without optimizing only memory for a few lines of the images is needed and the coding is faster,

    normally optimizing isn't a problem, but for very large (e.g. gigapixel panos) and few system memory, the storing of the images for code analyzing can be a memory problem,

    btw - have also a look into the "kmakemultires.config",
    there the settings are also explained,

    best regards,
    Klaus

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