how to view pdf file in asp.net using c# : How to extract text from pdf image file software control dll windows web page azure web forms cips2ed36-part1034

F.1. CODE LISTINGS FOR CHAPTER 1
339
*
It returns a 1 if the images are not
*
the same size.
*
*********************************************/
int are_not_same_size(file1, file2)
char *file1, *file2;
{
int result = 0;
long cols1 = 1,
cols2 = 2,
rows1 = 3,
rows2 = 4;
get_image_size(file1, &rows1, &cols1);
get_image_size(file2, &rows2, &cols2);
if(rows1 != rows2 || cols1 != cols2)
result = 1;
return(result);
} /* ends are_not_same_size */
/*********************************************
*
*
equate_bitmapheaders(...
*
*
This function sets the elements of the
*
destination header to the values of the
*
source header.
*
*********************************************/
equate_bitmapheaders(src, dest)
struct bitmapheader *src, *dest;
{
dest->size
= src->size;
dest->width
= src->width;
dest->height
= src->width;
dest->planes
= src->planes;
dest->bitsperpixel = src->bitsperpixel;
How to extract text from pdf image file - Select, copy, paste PDF images in C#.net, ASP.NET, MVC, Ajax, WinForms, WPF
Support PDF Image Extraction from a Page, a Region on a Page, and PDF Document
extract image from pdf java; extract photo from pdf
How to extract text from pdf image file - VB.NET PDF Image Extract Library: Select, copy, paste PDF images in vb.net, ASP.NET, MVC, Ajax, WinForms, WPF
Support PDF Image Extraction from a Page, a Region on a Page, and PDF Document
extract image from pdf acrobat; extract image from pdf
340
APPENDIX F. SOURCE CODE LISTINGS
dest->compression = src->compression;
dest->sizeofbitmap = src->sizeofbitmap;
dest->horzres
= src->horzres;
dest->vertres
= src->vertres;
dest->colorsused
= src->colorsused;
dest->colorsimp
= src->colorsimp;
} /* ends equate_bitmapheader */
/******************************************
*
*
get_bitsperpixel(...
*
*
This function reads the bits per pixel
*
from either a tiff or bmp image file.
*
******************************************/
int get_bitsperpixel(file_name, bitsperpixel)
char *file_name;
long *bitsperpixel;
{
int
is_bmp = 0,
is_tiff = 0,
result = 0;
long
temp;
struct bitmapheader bmph;
struct tiff_header_struct tiffh;
if(is_a_bmp(file_name)){
is_bmp = 1;
read_bm_header(file_name, &bmph);
temp = (long)bmph.bitsperpixel;
*bitsperpixel = temp;
} /* ends if is_a_bmp */
if(is_a_tiff(file_name)){
is_tiff = 1;
read_tiff_header(file_name, &tiffh);
*bitsperpixel = tiffh.bits_per_pixel;
} /* ends if is_a_bmp */
C# PDF Text Extract Library: extract text content from PDF file in
PDF file. Ability to extract highlighted text out of PDF document. Supports text extraction from scanned PDF by using XDoc.PDF for .NET Pro. Image text extraction
extract text from image pdf file; extract images from pdf files without using copy and paste
VB.NET PDF Text Extract Library: extract text content from PDF
Extract and get partial and all text content from PDF file. Extract highlighted text out of PDF document. Image text extraction control provides text extraction
pdf image text extractor; extract jpg pdf
F.1. CODE LISTINGS FOR CHAPTER 1
341
if(is_bmp == 1 || is_tiff == 1)
result = 1;
return(result);
} /* ends get_image_size */
/******************************************
*
*
get_lsb(...
*
*
This function reads the lsb flag
*
from a tiff image file.
*
******************************************/
int get_lsb(name)
char *name;
{
int
result = 0;
struct tiff_header_struct tiff_header;
if(is_a_bmp(name))
result = 1;
if(is_a_tiff(name)){
read_tiff_header(name, &tiff_header);
if(tiff_header.lsb == 1)
result = 1;
} /* ends if is a tiff */
return(result);
} /* ends get_lsb */
Listing 1.1 - The High-Level I/O Routines
C# PDF insert image Library: insert images into PDF in C#.net, ASP
Create high resolution PDF file without image quality losing in ASP.NET application. Add multiple images to multipage PDF document in .NET WinForms.
pdf extract images; extract image from pdf using
VB.NET PDF File Compress Library: Compress reduce PDF size in vb.
Reduce image resources: Since images are usually or large size, images size reducing can help to reduce PDF file size effectively.
extract images from pdf files; extract color image from pdf in c#
342
APPENDIX F. SOURCE CODE LISTINGS
/***********************************************
*
*
read_tiff_header(...
*
*
This function reads the header of a TIFF
*
file and places the needed information into
*
the struct tiff_header_struct.
*
***********************************************/
read_tiff_header(file_name, image_header)
char file_name[];
struct tiff_header_struct *image_header;
{
char buffer[12], response[80];
FILE *image_file;
int bytes_read,
closed,
i,
j,
lsb,
not_finished,
position;
long bits_per_pixel,
image_length,
image_width,
length_of_field,
offset_to_ifd,
strip_offset,
subfile,
value;
short entry_count,
field_type,
s_bits_per_pixel,
s_image_length,
s_image_width,
s_strip_offset,
tag_type;
VB.NET PDF insert image library: insert images into PDF in vb.net
VB.NET code to add an image to the inputFilePath As String = Program.RootPath + "\\" 1.pdf" Dim doc New PDFDocument(inputFilePath) ' Get a text manager from
online pdf image extractor; extract photos pdf
C# PDF File Split Library: Split, seperate PDF into multiple files
Application. Best and professional adobe PDF file splitting SDK for Visual Studio .NET. outputOps); Divide PDF File into Two Using C#.
extract images pdf acrobat; extract jpg from pdf
F.1. CODE LISTINGS FOR CHAPTER 1
343
image_file = fopen(file_name, "rb");
if(image_file != NULL){
/*************************************
*
*
Determine if the file uses MSB
*
first or LSB first
*
*************************************/
bytes_read = fread(buffer, 1, 8, image_file);
if(buffer[0] == 0x49)
lsb = 1;
else
lsb = 0;
/*************************************
*
*
Read the offset to the IFD
*
*************************************/
extract_long_from_buffer(buffer, lsb, 4,
&offset_to_ifd);
not_finished = 1;
while(not_finished){
/*************************************
*
*
Seek to the IFD and read the
*
entry_count, i.e. the number of
*
entries in the IFD.
*
*************************************/
position
= fseek(image_file, offset_to_ifd,
SEEK_SET);
bytes_read = fread(buffer, 1, 2, image_file);
extract_short_from_buffer(buffer, lsb, 0,
&entry_count);
/***************************************
*
C# PDF File Compress Library: Compress reduce PDF size in C#.net
Reduce image resources: Since images are usually or large size, images size reducing can help to reduce PDF file size effectively.
extract photos from pdf; extract image from pdf c#
VB.NET PDF File Merge Library: Merge, append PDF files in vb.net
When you have downloaded the RasterEdge Image SDK for also provided you with detailed PDF processing demo Imaging.Demo directory with the file name RasterEdge
how to extract images from pdf files; extract image from pdf java
344
APPENDIX F. SOURCE CODE LISTINGS
*
Now loop over the directory entries.
*
Look only for the tags we need. These
*
are:
*
ImageLength
*
ImageWidth
*
BitsPerPixel(BitsPerSample)
*
StripOffset
*
*****************************************/
for(i=0; i<entry_count; i++){
bytes_read = fread(buffer, 1, 12, image_file);
extract_short_from_buffer(buffer, lsb, 0,
&tag_type);
switch(tag_type){
case 255: /* Subfile Type */
extract_short_from_buffer(buffer, lsb, 2,
&field_type);
extract_short_from_buffer(buffer, lsb, 4,
&length_of_field);
extract_long_from_buffer(buffer, lsb, 8,
&subfile);
break;
case 256: /* ImageWidth */
extract_short_from_buffer(buffer, lsb, 2,
&field_type);
extract_short_from_buffer(buffer, lsb, 4,
&length_of_field);
if(field_type == 3){
extract_short_from_buffer(buffer, lsb, 8,
&s_image_width);
image_width = s_image_width;
}
else
extract_long_from_buffer(buffer, lsb, 8,
&image_width);
break;
case 257: /* ImageLength */
extract_short_from_buffer(buffer, lsb, 2,
&field_type);
extract_short_from_buffer(buffer, lsb, 4,
F.1. CODE LISTINGS FOR CHAPTER 1
345
&length_of_field);
if(field_type == 3){
extract_short_from_buffer(buffer, lsb, 8,
&s_image_length);
image_length = s_image_length;
}
else
extract_long_from_buffer(buffer, lsb, 8,
&image_length);
break;
case 258: /* BitsPerSample */
extract_short_from_buffer(buffer, lsb, 2,
&field_type);
extract_short_from_buffer(buffer, lsb, 4,
&length_of_field);
if(field_type == 3){
extract_short_from_buffer(buffer, lsb, 8,
&s_bits_per_pixel);
bits_per_pixel = s_bits_per_pixel;
}
else
extract_long_from_buffer(buffer, lsb, 8,
&bits_per_pixel);
break;
case 273: /* StripOffset */
extract_short_from_buffer(buffer, lsb, 2,
&field_type);
extract_short_from_buffer(buffer, lsb, 4,
&length_of_field);
if(field_type == 3){
extract_short_from_buffer(buffer, lsb, 8,
&s_strip_offset);
strip_offset = s_strip_offset;
}
else
extract_long_from_buffer(buffer, lsb, 8,
&strip_offset);
break;
default:
break;
} /* ends switch tag_type */
346
APPENDIX F. SOURCE CODE LISTINGS
} /* ends loop over i directory entries */
bytes_read = fread(buffer, 1, 4, image_file);
extract_long_from_buffer(buffer, lsb, 0,
&offset_to_ifd);
if(offset_to_ifd == 0) not_finished = 0;
} /* ends while not_finished */
image_header->lsb
= lsb;
image_header->bits_per_pixel = bits_per_pixel;
image_header->image_length
= image_length;
image_header->image_width
= image_width;
image_header->strip_offset
= strip_offset;
closed = fclose(image_file);
} /* ends if file opened ok */
else{
printf("\n\nTIFF.C> ERROR - could not open "
"tiff file");
}
} /* ends read_tiff_header */
/****************************************
*
*
read_tiff_image(...
*
*
This function reads the image data
*
from a tiff image file.
*
*
It only works for 8-bit gray scale
*
images.
*
****************************************/
read_tiff_image(image_file_name, the_image)
char
image_file_name[];
short
**the_image;
{
F.1. CODE LISTINGS FOR CHAPTER 1
347
char *buffer, /* CHANGED */
rep[80];
int
bytes_read,
closed,
position,
i,
j;
FILE *image_file;
float a;
long line_length, offset;
struct tiff_header_struct image_header;
read_tiff_header(image_file_name, &image_header);
/***********************************************
*
*
Procedure:
*
Seek to the strip offset where the data begins.
*
Seek to the first line you want.
*
Loop over the lines you want to read:
*
Seek to the first element of the line.
*
Read the line.
*
Seek to the end of the data in that line.
*
************************************************/
image_file = fopen(image_file_name, "rb");
if(image_file != NULL){
position = fseek(image_file,
image_header.strip_offset,
SEEK_SET);
for(i=0; i<image_header.image_length; i++){
bytes_read
= read_line(image_file, the_image,
i, &image_header,
0, image_header.image_width);
} /* ends loop over i */
closed = fclose(image_file);
} /* ends if file opened ok */
else{
printf("\nRTIFF.C> ERROR - cannot open "
"tiff file");
348
APPENDIX F. SOURCE CODE LISTINGS
}
} /* ends read_tiff_image */
/**********************************************
*
*
read_line(...
*
*
This function reads bytes from the TIFF
*
file into a buffer, extracts the numbers
*
from that buffer, and puts them into a
*
ROWSxCOLS array of shorts. The process
*
depends on the number of bits per pixel used
*
in the file (4 or 8).
*
**********************************************/
read_line(image_file, the_image, line_number,
image_header, ie, le)
FILE
*image_file;
int
ie, le, line_number;
short **the_image;
struct tiff_header_struct *image_header;
{
char *buffer, first, second;
float a, b;
int bytes_read, i;
unsigned int bytes_to_read;
union short_char_union scu;
buffer = (char *) malloc(image_header->image_width * sizeof(char ));
for(i=0; i<image_header->image_width; i++)
buffer[i] = ’\0’;
/********************************************
*
*
Use the number of bits per pixel to
*
calculate how many bytes to read.
*
********************************************/
Documents you may be interested
Documents you may be interested