RePageParm, RePageResult, RePageData

typedef struct RePageParm_tag  {
  RepData rep;
  ReSpellData respell1;
  ReSpellData respell2;
  ReRect application_area;
} RePageParm_tag;

typedef struct RePageResult_tag {  
  ReRect subimage;
  long result_flag;
  long filler1;
  ReImageHandle h_result_image_bw;
  short block_number;
  short rep_result_len;
  short filler2[2];
  RepResult *rep_result;
} RePageResult_tag;

typedef struct RePageData_tag {
  ReImage image_in;
  ong parameter;
  long filler1;
  ReImage image_deskewed;
  ReImageHandle h_image_deskewed;
  ReRect content;
  short re_page_deskew; 
  short re_page_parm_len;
  short filler2[2];
  RePageParm *re_page_parm;
  short block_count;
  short re_page_result_len;
  short filler3[2];
  RePageResult *re_page_result;
} RePageData;

Elements:

rep
initialized classifier and parameters for recognition. Do not set rep.init.rep_memory or rep.init.rep_memory_size as re_page() will do this internally but set rep.init.rel_grid_maxlen, .rel_graph_maxlen, and .rel_result_maxlen.
respell1
Initialized spellchecker number one or zeroed memory.
respell2
Initialized spellchecker number two or zeroed memory.
application_area
Area of application for this classifierand the spellcheckers, related to the deskewed content image.
subimage
Position of the segmented or found area in the provided input image or position in the deskewed input image if the input image had to be deskewed.
result_flag
Specifies the type of the found area.
RESULT_FLAG_NOTEXTpicture, graphics or something else
RESULT_FLAG_GRIDline, box, grid of lines, or something like this
RESULT_FLAG_UNDERLINEunderline of a text line
RESULT_FLAG_TEXTarea of text lines
filler1
8 byte alignment.
h_result_image_bw
Image handle of a black and white version of the segmented subimage. Call re_imagehandle2image() to get this black and white result_image. Call re_freeimage(*.h_result_image_bw) to free the related memory.
block_number
the paragraphs of a page are grouped into blocks. block_number==0 means the paragraph is a block of its own.
rep_result_len
Number of items in rep_result if result_flag==RESULT_FLAG_TEXT.
filler2
8 byte alignment.
*rep_result
Results of line recognition if result_flag==RESULT_FLAG_TEXT.
image_in
Image to be analyzed for layout.
parameter
LAYOUT_OPTIONS_FAST_GRID
image_deskewed
If the given image isn't correctly horizontally positioned, the corrected, deskewed image will be provided here.
h_image_deskewedler
Image handle of the deskewed image, if this value or re_layout_deskew is different from 0. Call re_freeimage(*.h_image_deskewed) to free the allocated memory.
content
Found global area of interest in the given image, containing all results.
re_page_deskew
Corrected skew of image_in. If different from 0, image_deskewed with h_image_deskewed is provided.
re_page_parm_len
Number of items in re_page_parm, to be set before calling re_page().
filler2[2]
8 byte alignment.
re_page_parm
Parameters for page recognition, to be set before calling re_page().
block_count
The paragraphs of a page are grouped into blocks; number of found real blocks +1.
re_page_result_len
Number of items in re_page_result.
filler3
8 byte alignment.
*re_page_result
Array of results of layout analysis. Call free(*.re_page_result) to free memory.

Reference: