Imagine 8.4 Histogram Format

[warmerdam]

Imagine 8.4 seems to keep the histogram in "MIFObject" format, which means that gdalinfo does not properly report the metadata for histomin, histomax or histocount.

    HistogramParameters(Eimg_StatisticsParameters840) @ 1417 + 876 @ 1545
    + LayerNames = (no values)
    + ExcludedValues = 1x1 basedata of type 3
    + AOIname = 
    +     string = (no values)
    + SkipFactorX = 1
    + SkipFactorY = 1
    + BinFunction = 
    +     type = 
    +         string = `Edsc_BinFunction840'
    +     MIFDictionary =
`{0:pcstring,}Emif_String,{1:x{0:pcstring,}Emif_String,type,0:pcMIFDic
tionary,0:pCMIFObject,}Emif_MIFObject,{1:lstartBin,1:LbinCount,1:LorigBinCount,1:x{1:x{0:pcstrin
g,}Emif_String,type,0:pcMIFDictionary,0:pCMIFObject,}Emif_MIFObject,binFunction,1:x{0:pcstring,}
Emif_String,title,}Edsc_BinFunction840,.'
    +     MIFObject = `'

See zonegimg.img

[warmerdam]

Put off till 1.4.3.

[warmerdam]

This seems to be non-critical, moving to 1.5.0.

[warmerdam]

exotic histogram reading is relatively low priority, deferred to 1.6.

[warmerdam]

remove non-serious milestone.

[Jukka Rahkonen]

I believe that GDAL finds histograms from HFA but I don't have sample image which I can know to hold something called "histogram in "MIFObject" format". CC gillins, you must know because you have made such advanced patches lately. And nflood as well. Can I close this ancient ticket?

[nflood]

Replying to jratike80:

I believe that GDAL finds histograms from HFA but I don't have sample image which I can know to hold something called "histogram in "MIFObject" format". CC gillins, you must know because you have made such advanced patches lately. And nflood as well. Can I close this ancient ticket?

Yes, I would say you can close the ticket. If the original problem was that gdalinfo did not report the histomin, etc. for HFA files, it certainly does that now. They are reported via special band metadata fields. GDAL certainly access to these values for HFA. See hfaopen.cpp:HFASetMetadata(), after the comment "Special case to write out the histogram." for example of the complexity of the HFA format representation.