how to view pdf file in asp.net using c# : Extract jpg from pdf control Library platform web page asp.net azure web browser cips2ed48-part1047

F.7. CODE LISTINGS FOR CHAPTER 7
459
"\n Sobel Kirsch Prewitt edge detectors"
"\nmedge B in-file out-file threshold (1/0) high type (1,2,3)"
"\n Homogeneity edge detector"
"\nmedge H in-file out-file threshold (1/0) high"
"\n Difference edge detector"
"\nmedge D in-file out-file threshold (1/0) high"
"\n Contrast edge detector"
"\nmedge C in-file out-file threshold (1/0) high"
"\n Range edge detector"
"\nmedge R in-file out-file threshold (1/0) high size(3,5,7...)"
"\n Variance edge detector"
"\nmedge V in-file out-file threshold (1/0) high"
"\n Guassian edge detector"
"\nmedge G in-file out-file threshold (1/0) high size(7 or 9)"
"\n Enhance edges"
"\nmedge E in-file out-file high "
"\n");
} /* ends show_edge_usage */
Listing 6.2 - The medge Program
F.7 Code Listings for Chapter 7
/***********************************************
*
*
file filter.c
*
*
Functions: This file contains
*
filter_image
*
median_filter
*
setup_filters
*
get_filter_options
*
median_of
*
fsort_elements
*
fswap
*
*
Purpose:
*
These functions implement several
*
types of basic spatial frequency
*
filters.
*
Extract jpg from pdf - 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 online; extract text from pdf image
Extract jpg from pdf - 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
pdf image extractor; extract image from pdf java
460
APPENDIX F. SOURCE CODE LISTINGS
*
External Calls:
*
utility.c - fix_edges
*
*
Modifications:
*
15 February 1992 - created
*
22 April 1998 - added capability to
*
work an entire image at one time.
*
*************************************************/
#include "cips.h"
/*******************************************
*
*
Define the filter masks.
*
*******************************************/
short lpf_filter_6[3][3] =
{ {0, 1, 0},
{1, 2, 1},
{0, 1, 0}};
short lpf_filter_9[3][3] =
{ {1, 1, 1},
{1, 1, 1},
{1, 1, 1}};
short lpf_filter_10[3][3] =
{ {1, 1, 1},
{1, 2, 1},
{1, 1, 1}};
short lpf_filter_16[3][3] =
{ {1, 2, 1},
{2, 4, 2},
{1, 2, 1}};
short lpf_filter_32[3][3] =
{ {1, 4, 1},
{4, 12, 4},
{1, 4, 1}};
short hpf_filter_1[3][3] =
C# PDF Convert to Jpeg SDK: Convert PDF to JPEG images in C#.net
NET library to batch convert PDF files to jpg image files. High Turn multiple pages PDF into single jpg files respectively online. Support
how to extract images from pdf; extract images pdf acrobat
VB.NET PDF Convert to Jpeg SDK: Convert PDF to JPEG images in vb.
PDF to images, C#.NET PDF file & pages edit, C#.NET PDF pages extract, copy, paste, C# NET components to batch convert adobe PDF files to jpg image files.
extract vector image from pdf; how to extract pictures from pdf files
F.7. CODE LISTINGS FOR CHAPTER 7
461
{ { 0, -1, 0},
{-1, 5, -1},
{ 0, -1, 0}};
short hpf_filter_2[3][3] =
{ {-1, -1, -1},
{-1, 9, -1},
{-1, -1, -1}};
short hpf_filter_3[3][3] =
{ { 1, -2, 1},
{-2, 5, -2},
{ 1, -2, 1}};
/*******************************************
*
*
filter_image(...
*
*
This function filters an image by using
*
a single 3x3 mask.
*
*******************************************/
filter_image(the_image, out_image,
rows, cols, bits_per_pixel,
filter, type, low_high)
int
type;
short filter[3][3],
**the_image,
**out_image;
char
low_high[];
long
rows, cols, bits_per_pixel;
{
int
a, b, d, i, j, k,
length, max, sum, width;
setup_filters(type, low_high, filter);
d = type;
C# Image Convert: How to Convert Adobe PDF to Jpeg, Png, Bmp, &
String inputFilePath = @"C:\input.pdf"; String outputFilePath = @"C:\output.jpg"; // Convert PDF to jpg. C# sample code for PDF to jpg image conversion.
extract images from pdf file; extract jpg pdf
C# Image Convert: How to Convert Tiff Image to Jpeg, Png, Bmp, &
RasterEdge.XDoc.PDF.dll. String inputFilePath = @"C:\input.tif"; String outputFilePath = @"C:\output.jpg"; // Convert tiff to jpg.
extract images from pdf c#; pdf image text extractor
462
APPENDIX F. SOURCE CODE LISTINGS
if(type == 2 || type == 3) d = 1;
max = 255;
if(bits_per_pixel == 4)
max = 16;
/* Do convolution over image array */
printf("\n");
for(i=1; i<rows-1; i++){
if( (i%10) == 0) printf("%d ", i);
for(j=1; j<cols-1; j++){
sum = 0;
for(a=-1; a<2; a++){
for(b=-1; b<2; b++){
sum = sum +
the_image[i+a][j+b] *
filter[a+1][b+1];
}
}
sum
= sum/d;
if(sum < 0)
sum = 0;
if(sum > max) sum = max;
out_image[i][j]
= sum;
} /* ends loop over j */
} /* ends loop over i */
fix_edges(out_image, 1, rows-1, cols-1);
} /* ends filter_image */
/*******************************************
*
*
median_filter(..
*
*
This function performs a median filter
*
on an image using a size (3x3, 5x5, etc.)
*
specified in the call.
*
*******************************************/
median_filter(the_image, out_image,
rows, cols, size)
int
size;
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 pictures from pdf; how to extract images from pdf file
VB.NET PDF - Convert PDF with VB.NET WPF PDF Viewer
read PDF, VB.NET convert PDF to text, VB.NET extract PDF pages, VB PDF to image file formats with high quality, support converting PDF to PNG, JPG, BMP and
extract images from pdf files without using copy and paste; pdf extract images
F.7. CODE LISTINGS FOR CHAPTER 7
463
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
*
****************************/
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++;
}
}
out_image[i][j] = median_of(elements, &ss);
} /* ends loop over j */
} /* ends loop over i */
free(elements);
fix_edges(out_image, sd2, rows-1, cols-1);
C# WPF PDF Viewer SDK to convert and export PDF document to other
C#.NET PDF file & pages edit, C#.NET PDF pages extract, copy, paste PDF to image file formats with high quality, support converting PDF to PNG, JPG, BMP and
how to extract a picture from a pdf; extract images from pdf acrobat
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 image from pdf; extract images from pdf online
464
APPENDIX F. SOURCE CODE LISTINGS
} /* ends median_filter */
/***********************************************
*
*
median_of(...
*
*
This function finds and returns the
*
median value of the elements array.
*
*
As a side result, it also sorts the
*
elements array.
*
***********************************************/
median_of(elements, count)
int
*count;
short elements[];
{
short median;
fsort_elements(elements, count);
median = elements[*count/2];
return(median);
} /* ends median_of */
/***********************************************
*
*
fsort_elements(...
*
*
This function performs a simple bubble
*
sort on the elements from the median
*
filter.
*
***********************************************/
fsort_elements(elements, count)
int
*count;
short elements[];
F.7. CODE LISTINGS FOR CHAPTER 7
465
{
int i, j;
j = *count;
while(j-- > 1){
for(i=0; i<j; i++){
if(elements[i] > elements[i+1])
fswap(&elements[i], &elements[i+1]);
}
}
} /* ends fsort_elements */
/***********************************************
*
*
fswap(...
*
*
This function swaps two shorts.
*
***********************************************/
fswap(a, b)
short *a, *b;
{
short temp;
temp = *a;
*a
= *b;
*b
= temp;
} /* ends swap */
/************************************************
*
*
setup_filters(...
*
*
This function copies the filter mask
*
values defined at the top of this file
*
into the filter array.
*
************************************************/
466
APPENDIX F. SOURCE CODE LISTINGS
setup_filters(filter_type, low_high, filter)
char
low_high[];
int
filter_type;
short filter[3][3];
{
int i, j;
if(low_high[0] == ’l’ || low_high[0] ==’L’){
if(filter_type == 6){
for(i=0; i<3; i++){
for(j=0; j<3; j++){
filter[i][j] = lpf_filter_6[i][j];
}
}
} /* ends if filter_type == 6 */
if(filter_type == 9){
for(i=0; i<3; i++){
for(j=0; j<3; j++){
filter[i][j] = lpf_filter_9[i][j];
}
}
} /* ends if filter_type == 9 */
if(filter_type == 10){
for(i=0; i<3; i++){
for(j=0; j<3; j++){
filter[i][j] = lpf_filter_10[i][j];
}
}
} /* ends if filter_type == 10 */
if(filter_type == 16){
for(i=0; i<3; i++){
for(j=0; j<3; j++){
filter[i][j] = lpf_filter_16[i][j];
}
}
} /* ends if filter_type == 16 */
if(filter_type == 32){
F.7. CODE LISTINGS FOR CHAPTER 7
467
for(i=0; i<3; i++){
for(j=0; j<3; j++){
filter[i][j] = lpf_filter_32[i][j];
}
}
} /* ends if filter_type == 32 */
} /* ends low pass filter */
if(low_high[0] == ’h’ || low_high[0] ==’H’){
if(filter_type == 1){
for(i=0; i<3; i++){
for(j=0; j<3; j++){
filter[i][j] = hpf_filter_1[i][j];
}
}
} /* ends if filter_type == 1 */
if(filter_type == 2){
for(i=0; i<3; i++){
for(j=0; j<3; j++){
filter[i][j] = hpf_filter_2[i][j];
}
}
} /* ends if filter_type == 2 */
if(filter_type == 3){
for(i=0; i<3; i++){
for(j=0; j<3; j++){
filter[i][j] = hpf_filter_3[i][j];
}
}
} /* ends if filter_type == 3 */
} /* ends high pass filter */
} /* ends setup_filters */
Listing 7.1 - Image Filter Operators
468
APPENDIX F. SOURCE CODE LISTINGS
/***********************************************
*
*
file mfilter.c
*
*
Functions: This file contains
*
main
*
*
Purpose:
*
This is the main calling program for
*
a set of spatial filtering routines.
*
*
External Calls:
*
imageio.c - create_image_file
*
read_image_array
*
write_image_array
*
get_image_size
*
get_bitsperpixel
*
allocate_image_array
*
free_image_array
*
filter.c - filter_image
*
median_filter
*
high_pixel
*
low_pixel
*
*
Modifications:
*
15 February 1992 - created
*
01 January 1993 - added calls to
*
high_pixel and low_pixel.
*
18 September 1998 - modified to work with
*
all I O routines in imageio.c.
*
***********************************************/
#include "cips.h"
main(argc, argv)
int argc;
char *argv[];
{
char
name1[MAX_NAME_LENGTH];
Documents you may be interested
Documents you may be interested