how to view pdf file in asp.net using c# : Extract pdf pages to jpg application software utility azure windows asp.net visual studio cips2ed53-part1053

F.9. CODE LISTINGS FOR CHAPTER 9
509
int
segment;
long
length, width;
short background, hi, low, object, value;
short **the_image, **out_image;
/******************************************
*
*
Ensure the command line is correct.
*
******************************************/
if(argc < 8){
printf(
"\n\nmainseg in-file out-file hi low "
"value operation segment"
"\n"
"\n\thi and low are thresholds"
"\n\tvalue is output pixel value"
"\n\toperation = Threshold Grow Peaks"
" Valleys Adaptive"
"\n\tsegment is 1 (perform segmentation) "
"or 0 (don’t)");
printf("\n");
exit(0);
}
strcpy(name1, argv[1]);
strcpy(name2, argv[2]);
hi
= atoi(argv[3]);
low
= atoi(argv[4]);
value
= atoi(argv[5]);
segment = atoi(argv[7]);
if(does_not_exist(name1)){
printf("\nERROR input file %s does not exist",
name1);
exit(0);
}
/******************************************
*
*
Read the input image header, allocate
*
the image arrays, create the output
*
image, and read the input image.
*
Extract pdf pages to jpg - 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
pdf image extractor online; extract images from pdf c#
Extract pdf pages to jpg - 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
how to extract images from pdf; extract images from pdf
510
APPENDIX F. SOURCE CODE LISTINGS
******************************************/
get_image_size(name1, &length, &width);
the_image = allocate_image_array(length, width);
out_image = allocate_image_array(length, width);
create_file_if_needed(name1, name2, out_image);
read_image_array(name1, the_image);
/*********************************
*
*
Manual Threshold operation
*
*********************************/
if(argv[6][0] == ’t’ || argv[6][0] == ’T’){
manual_threshold_segmentation(
the_image, out_image,
hi, low, value, segment,
length, width);
write_image_array(name2, out_image);
} /* ends if t */
/*********************************
*
*
Grow region operation
*
*********************************/
if(argv[6][0] == ’g’ || argv[6][0] == ’G’){
grow(the_image, value,
length, width);
write_image_array(name2, the_image);
} /* ends if g */
/*********************************
*
*
Peak threshold operation
*
*********************************/
C# PDF Convert to Jpeg SDK: Convert PDF to JPEG images in C#.net
Turn multiple pages PDF into single jpg files respectively online. Support of converting from any single one PDF page and multiple pages.
extract vector image from pdf; pdf extract images
VB.NET PDF Convert to Jpeg SDK: Convert PDF to JPEG images in vb.
text, C#.NET convert PDF to images, C#.NET PDF file & pages edit, C#.NET PDF pages extract, copy, paste Turn multiple pages PDF into multiple jpg files in
extract pdf pages to jpg; some pdf image extract
F.9. CODE LISTINGS FOR CHAPTER 9
511
if(argv[6][0] == ’p’ || argv[6][0] == ’P’){
peak_threshold_segmentation(
the_image, out_image,
value, segment,
length, width);
write_image_array(name2, out_image);
} /* ends if p */
/*********************************
*
*
Valley threshold operation
*
*********************************/
if(argv[6][0] == ’v’ || argv[6][0] == ’V’){
valley_threshold_segmentation(
the_image, out_image,
value, segment,
length, width);
write_image_array(name2, out_image);
} /* ends if v */
/*********************************
*
*
Adaptive threshold operation
*
*********************************/
if(argv[6][0] == ’a’ || argv[6][0] == ’A’){
adaptive_threshold_segmentation(
the_image, out_image,
value, segment,
length, width);
write_image_array(name2, out_image);
} /* ends if a */
free_image_array(out_image, length);
free_image_array(the_image, length);
} /* ends main */
Listing 9.3 - The mainseg Program
C# Image Convert: How to Convert Adobe PDF to Jpeg, Png, Bmp, &
C# sample code for PDF to jpg image conversion. This demo code convert PDF file all pages to jpg images. // Define input and output files path.
extract jpeg from pdf; extract images from pdf acrobat
C# Image Convert: How to Convert Tiff Image to Jpeg, Png, Bmp, &
RasterEdge.XDoc.Office.Inner.Office03.dll. RasterEdge.XDoc.PDF.dll. RasterEdge.XDoc. PowerPoint.dll. This demo code convert TIFF file all pages to jpg images.
extract jpg pdf; extract pictures from pdf
512
APPENDIX F. SOURCE CODE LISTINGS
F.10 Code Listings for Chapter 10
/*******************************************
*
*
low_pixel(..
*
*
This function replaces the pixel at
*
the center of a 3x3, 5x5, etc. area
*
with the min for that area.
*
*******************************************/
low_pixel(the_image, out_image,
rows, cols, size)
int
size;
short **the_image,
**out_image;
long
rows, cols;
{
int
a, b, count, i, j, k,
length, sd2, sd2p1, ss, width;
short *elements;
sd2
= size/2;
sd2p1 = sd2 + 1;
/**********************************************
*
*
Allocate the elements array large enough
*
to hold size*size shorts.
*
**********************************************/
ss
= size*size;
elements = (short *) malloc(ss * sizeof(short));
/***************************
*
*
Loop over image array
*
****************************/
C# Create PDF from images Library to convert Jpeg, png images to
Batch convert PDF documents from multiple image formats, including Jpg, Png, Bmp, Gif, Tiff, Bitmap, .NET Graphics, and REImage.
extract images from pdf file; extract images pdf
VB.NET PDF - Convert PDF with VB.NET WPF PDF Viewer
convert PDF to text, VB.NET extract PDF pages, VB.NET Create multiple pages Tiff file from PDF document. formats with high quality, support converting PDF to PNG
how to extract pictures from pdf files; extract image from pdf online
F.10. CODE LISTINGS FOR CHAPTER 10
513
printf("\n");
for(i=sd2; i<rows-sd2; i++){
if( (i%10) == 0) printf("%d ", i);
for(j=sd2; j<cols-sd2; j++){
count = 0;
for(a=-sd2; a<sd2p1; a++){
for(b=-sd2; b<sd2p1; b++){
elements[count] = the_image[i+a][j+b];
count++;
}
}
fsort_elements(elements, &ss);
out_image[i][j] = elements[0];
} /* ends loop over j */
} /* ends loop over i */
free(elements);
fix_edges(out_image, sd2, rows-1, cols-1);
} /* ends low_pixel */
/*******************************************
*
*
high_pixel(..
*
*
This function replaces the pixel at
*
the center of a 3x3, 5x5, etc. area
*
with the max for that area.
*
*******************************************/
high_pixel(the_image, out_image,
rows, cols, size)
int
size;
short **the_image,
**out_image;
long
rows, cols;
{
int
a, b, count, i, j, k,
length, sd2, sd2p1, ss, width;
short *elements;
C# WPF PDF Viewer SDK to convert and export PDF document to other
PDF file & pages edit, C#.NET PDF pages extract, copy, paste Create multiple pages Tiff file from PDF document. with high quality, support converting PDF to PNG
extract text from pdf image; some pdf image extractor
VB.NET Create PDF from images Library to convert Jpeg, png images
Support create PDF from multiple image formats in VB.NET, including Jpg, Png, Bmp, Gif, Tiff, Bitmap, .NET Graphics, and REImage.
extract images from pdf files; how to extract images from pdf file
514
APPENDIX F. SOURCE CODE LISTINGS
sd2
= size/2;
sd2p1 = sd2 + 1;
/**********************************************
*
*
Allocate the elements array large enough
*
to hold size*size shorts.
*
**********************************************/
ss
= size*size;
elements = (short *) malloc(ss * sizeof(short));
/***************************
*
*
Loop over image array
*
****************************/
printf("\n");
for(i=sd2; i<rows-sd2; i++){
if( (i%10) == 0) printf("%d ", i);
for(j=sd2; j<cols-sd2; j++){
count = 0;
for(a=-sd2; a<sd2p1; a++){
for(b=-sd2; b<sd2p1; b++){
elements[count] = the_image[i+a][j+b];
count++;
}
}
fsort_elements(elements, &ss);
out_image[i][j] = elements[ss-1];
} /* ends loop over j */
} /* ends loop over i */
free(elements);
fix_edges(out_image, sd2, rows-1, cols-1);
} /* ends high_pixel */
Listing 10.1 - The high
pixel and low
pixel Subroutines
F.10. CODE LISTINGS FOR CHAPTER 10
515
/***********************************************
*
*
file segment2.c
*
*
Functions: This file contains
*
find_cutoff_point
*
edge_region
*
gray_shade_region
*
edge_gray_shade_region
*
pixel_grow
*
pixel_label_and_check_neighbors
*
is_close
*
erode_image_array
*
get_edge_region_options
*
*
Purpose:
*
These function implement the three
*
segmentation techniques in Image
*
Processing part 10.
*
*
External Calls:
*
edges.c - quick_edge
*
homogeneity
*
difference_edge
*
contrast_edge
*
gaussian_edge
*
range
*
variance
*
detect_edges
*
hist.c - calculate_histogram
*
zero_histogram
*
thresh.c - threshold_image_array
*
*
Modifications:
*
5 December 1992 - created
*
15 August 1998 - modified to work on entire
*
images at once.
*
*************************************************/
#include "cips.h"
516
APPENDIX F. SOURCE CODE LISTINGS
struct stacksp{
short
x;
short
y;
struct stacksp *next;
};
struct stacksp *stackp;
/*******************************************
*
*
find_cutoff_point(..
*
*
This function looks at a histogram
*
and sets a cuttoff point at a given
*
percentage of pixels.
*
For example, if percent=0.6, you
*
start at 0 in the histogram and count
*
up until you’ve hit 60% of the pixels.
*
Then you stop and return that pixel
*
value.
*
********************************************/
find_cutoff_point(histogram, percent,
cutoff, rows, cols)
unsigned long histogram[];
float
percent;
long
cols, rows;
short
*cutoff;
{
float fd, fsum, sum_div;
int
i, looking;
long
lc, lr, num=0, sum=0;
sum
= 0;
i
= 0;
lr
= (long)(rows);
lc
= (long)(cols);
num
= lr*lc;
fd
= (float)(num);
while(looking){
F.10. CODE LISTINGS FOR CHAPTER 10
517
fsum
= (float)(sum);
sum_div = fsum/fd;
if(sum_div >= percent)
looking = 0;
else
sum = sum + histogram[i++];
} /* ends while looking */
if(i >= (GRAY_LEVELS+1)) i = GRAY_LEVELS;
*cutoff = i;
printf("\nCutoff is %d sum=%ld", *cutoff, sum);
} /* ends find_cutoff_point */
/*******************************************
*
*
erode_image_array(..
*
*
This function erodes pixels. If a pixel
*
equals value and has more than threshold
*
neighbors equal to 0, then set that
*
pixel in the output to 0.
*
*******************************************/
erode_image_array(the_image, out_image,
value, threshold,
rows, cols)
short **the_image,
**out_image,
threshold,
value;
long
cols, rows;
{
int
a, b, count, i, j, k,
length, width;
/***************************
*
*
Loop over image array
*
****************************/
518
APPENDIX F. SOURCE CODE LISTINGS
for(i=0; i<rows; i++)
for(j=0; j<cols; j++)
out_image[i][j] = the_image[i][j];
printf("\n");
for(i=1; i<rows-1; i++){
if( (i%10) == 0) printf("%3d", i);
for(j=1; j<cols-1; j++){
if(the_image[i][j] == value){
count = 0;
for(a=-1; a<=1; a++){
for(b=-1; b<=1; b++){
if(the_image[i+a][j+b] == 0)
count++;
} /* ends loop over b */
} /* ends loop over a */
if(count > threshold) out_image[i][j] = 0;
} /* ends if the_image == value */
} /* ends loop over j */
} /* ends loop over i */
} /* ends erode_image_array */
/**********************************************
*
*
pixel_grow(...
*
*
The function grows regions. It is similar
*
to the grow function in segment.c, but it
*
has several new capabilities. It can
*
eliminate regions if they are too large or
*
too small.
*
*
It ignores pixels = FORGET_IT. This allows
*
it to ignore edges or regions already
*
eliminated from consideration.
*
*
It adds pixels to a growing region only if
*
the pixel is close enough to the average gray
*
level of that region.
Documents you may be interested
Documents you may be interested