The fact that this method uses tiles is implementation detail. It does not change the result compared to Sauvola without tiles. The use of tiles minimize memory consumption.

Signed-off-by: NStefan Weil <sw@weilnetz.de>

Simplify the code also a little bit.
Signed-off-by: NStefan Weil <sw@weilnetz.de>

Use functions from Leptonica to provide more binarization options. The new options are: 1) Adaptive Otsu and 2) Sauvola (Tiled) .

Add new methods to Image class and replace them in non-public code.

Remove thresholder.h from the public API.
Signed-off-by: NStefan Weil <sw@weilnetz.de>

Add braces to single line statements (clang-tidy -checks='-*,google-readability-braces-around-statements')
Signed-off-by: NStefan Weil <sw@weilnetz.de>

Script:
find include src -type f | sort > all.txt
find include src -type f | grep -v "\.cpp" | grep -v "\.h" | sort > skip.txt
comm -23 all.txt skip.txt | xargs clang-format -i

Signed-off-by: NStefan Weil <sw@weilnetz.de>

The old code used pixConvertRGBToLuminance which only converts 32 bpp images.
Signed-off-by: NStefan Weil <sw@weilnetz.de>

Signed-off-by: NStefan Weil <sw@weilnetz.de>

Signed-off-by: NStefan Weil <sw@weilnetz.de>

It was rarely used, but added a lot of code and an unconditional
dependency on openclwrapper.h.
Signed-off-by: NStefan Weil <sw@weilnetz.de>

Signed-off-by: NStefan Weil <sw@weilnetz.de>

Credible resolution with be set afterward. Fixes #2080.

The ThresholdRectToPix OpenCL kernel only supports 4 channels.
Signed-off-by: NStefan Weil <sw@weilnetz.de>

Signed-off-by: NStefan Weil <sw@weilnetz.de>

Signed-off-by: NStefan Weil <sw@weilnetz.de>

Remove the unneeded include statement in platform.h.
Signed-off-by: NStefan Weil <sw@weilnetz.de>

Text files should end with a LF, but not additional empty lines.
Signed-off-by: NStefan Weil <sw@weilnetz.de>

Signed-off-by: NStefan Weil <sw@weilnetz.de>

* api: Replace Tesseract data types by POSIX data types
Signed-off-by: NStefan Weil <sw@weilnetz.de>

* ccmain: Replace Tesseract data types by POSIX data types
Signed-off-by: NStefan Weil <sw@weilnetz.de>

* ccstruct: Replace Tesseract data types by POSIX data types
Signed-off-by: NStefan Weil <sw@weilnetz.de>

* classify: Replace Tesseract data types by POSIX data types
Signed-off-by: NStefan Weil <sw@weilnetz.de>

* cutil: Replace Tesseract data types by POSIX data types
Signed-off-by: NStefan Weil <sw@weilnetz.de>

* dict: Replace Tesseract data types by POSIX data types
Signed-off-by: NStefan Weil <sw@weilnetz.de>

* textord: Replace Tesseract data types by POSIX data types
Signed-off-by: NStefan Weil <sw@weilnetz.de>

* training: Replace Tesseract data types by POSIX data types
Signed-off-by: NStefan Weil <sw@weilnetz.de>

* wordrec: Replace Tesseract data types by POSIX data types
Signed-off-by: NStefan Weil <sw@weilnetz.de>

* ccutil: Replace Tesseract data types by POSIX data types

Now all Tesseract data types which are no longer needed can be removed
from ccutil/host.h.
Signed-off-by: NStefan Weil <sw@weilnetz.de>

* ccmain: Replace Tesseract's MIN_*INT, MAX_*INT* by POSIX *INT*_MIN, *INT*_MAX
Signed-off-by: NStefan Weil <sw@weilnetz.de>

* ccstruct: Replace Tesseract's MIN_*INT, MAX_*INT* by POSIX *INT*_MIN, *INT*_MAX
Signed-off-by: NStefan Weil <sw@weilnetz.de>

* classify: Replace Tesseract's MIN_*INT, MAX_*INT* by POSIX *INT*_MIN, *INT*_MAX
Signed-off-by: NStefan Weil <sw@weilnetz.de>

* dict: Replace Tesseract's MIN_*INT, MAX_*INT* by POSIX *INT*_MIN, *INT*_MAX
Signed-off-by: NStefan Weil <sw@weilnetz.de>

* lstm: Replace Tesseract's MIN_*INT, MAX_*INT* by POSIX *INT*_MIN, *INT*_MAX
Signed-off-by: NStefan Weil <sw@weilnetz.de>

* textord: Replace Tesseract's MIN_*INT, MAX_*INT* by POSIX *INT*_MIN, *INT*_MAX
Signed-off-by: NStefan Weil <sw@weilnetz.de>

* wordrec: Replace Tesseract's MIN_*INT, MAX_*INT* by POSIX *INT*_MIN, *INT*_MAX
Signed-off-by: NStefan Weil <sw@weilnetz.de>

* ccutil: Replace Tesseract's MIN_*INT, MAX_*INT* by POSIX *INT*_MIN, *INT*_MAX

Remove the macros which are now unused from ccutil/host.h.
Remove also the obsolete history comments.
Signed-off-by: NStefan Weil <sw@weilnetz.de>

* Fix build error caused by ambiguous ClipToRange

Error message vom Appveyor CI:

    C:\projects\tesseract\ccstruct\coutln.cpp(818): error C2672: 'ClipToRange': no matching overloaded function found [C:\projects\tesseract\build\libtesseract.vcxproj]
    C:\projects\tesseract\ccstruct\coutln.cpp(818): error C2782: 'T ClipToRange(const T &,const T &,const T &)': template parameter 'T' is ambiguous [C:\projects\tesseract\build\libtesseract.vcxproj]
      c:\projects\tesseract\ccutil\helpers.h(122): note: see declaration of 'ClipToRange'
      C:\projects\tesseract\ccstruct\coutln.cpp(818): note: could be 'char'
      C:\projects\tesseract\ccstruct\coutln.cpp(818): note: or       'int'
Signed-off-by: NStefan Weil <sw@weilnetz.de>

* unittest: Replace Tesseract's MAX_INT8 by POSIX INT8_MAX
Signed-off-by: NStefan Weil <sw@weilnetz.de>

* arch: Replace Tesseract's MAX_INT8 by POSIX INT8_MAX
Signed-off-by: NStefan Weil <sw@weilnetz.de>

Fixes from pull of cleanups: clang tidied, reviewed, fixed new bugs, undeleted needed code. Probably breaks the build, due to some inclusion of changes in utf8/32 conversion

The first parameter is casted to an unsigned byte by Leptonica,
so we don't need additional type casts in Tesseract code.
Signed-off-by: NStefan Weil <sw@weilnetz.de>

Signed-off-by: NStefan Weil <sw@weilnetz.de>

git-svn-id: https://tesseract-ocr.googlecode.com/svn/trunk@1147 d0cd1f9f-072b-0410-8dd7-cf729c803f20