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Tutorial Make Border

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This commit is contained in:
tribta
2017-08-25 19:44:55 +01:00
parent a6f5e1f0ca
commit 9ff33dacfc
5 changed files with 373 additions and 83 deletions
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samples/cpp/tutorial_code/ImgTrans/copyMakeBorder_demo.cpp
+49 -52
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@@ -11,9 +11,10 @@
using namespace cv;
//![variables]
// Declare the variables
Mat src, dst;
int top, bottom, left, right;
int borderType;
int borderType = BORDER_CONSTANT;
const char* window_name = "copyMakeBorder Demo";
RNG rng(12345);
//![variables]
@@ -23,65 +24,61 @@ RNG rng(12345);
*/
int main( int argc, char** argv )
{
//![load]
String imageName("../data/lena.jpg"); // by default
if (argc > 1)
{
imageName = argv[1];
}
src = imread( imageName, IMREAD_COLOR ); // Load an image
//![load]
const char* imageName = argc >=2 ? argv[1] : "../data/lena.jpg";
if( src.empty() )
{
printf(" No data entered, please enter the path to an image file \n");
return -1;
// Loads an image
src = imread( imageName, IMREAD_COLOR ); // Load an image
// Check if image is loaded fine
if( src.empty()) {
printf(" Error opening image\n");
printf(" Program Arguments: [image_name -- default ../data/lena.jpg] \n");
return -1;
}
//![load]
//![load]
/// Brief how-to for this program
printf( "\n \t copyMakeBorder Demo: \n" );
printf( "\t -------------------- \n" );
printf( " ** Press 'c' to set the border to a random constant value \n");
printf( " ** Press 'r' to set the border to be replicated \n");
printf( " ** Press 'ESC' to exit the program \n");
// Brief how-to for this program
printf( "\n \t copyMakeBorder Demo: \n" );
printf( "\t -------------------- \n" );
printf( " ** Press 'c' to set the border to a random constant value \n");
printf( " ** Press 'r' to set the border to be replicated \n");
printf( " ** Press 'ESC' to exit the program \n");
//![create_window]
namedWindow( window_name, WINDOW_AUTOSIZE );
//![create_window]
//![create_window]
namedWindow( window_name, WINDOW_AUTOSIZE );
//![create_window]
//![init_arguments]
/// Initialize arguments for the filter
top = (int) (0.05*src.rows); bottom = (int) (0.05*src.rows);
left = (int) (0.05*src.cols); right = (int) (0.05*src.cols);
//![init_arguments]
//![init_arguments]
// Initialize arguments for the filter
top = (int) (0.05*src.rows); bottom = top;
left = (int) (0.05*src.cols); right = left;
//![init_arguments]
dst = src;
imshow( window_name, dst );
for(;;)
{
//![update_value]
Scalar value( rng.uniform(0, 255), rng.uniform(0, 255), rng.uniform(0, 255) );
//![update_value]
for(;;)
{
//![check_keypress]
char c = (char)waitKey(500);
if( c == 27 )
{ break; }
else if( c == 'c' )
{ borderType = BORDER_CONSTANT; }
else if( c == 'r' )
{ borderType = BORDER_REPLICATE; }
//![check_keypress]
//![copymakeborder]
copyMakeBorder( src, dst, top, bottom, left, right, borderType, value );
//![copymakeborder]
//![update_value]
Scalar value( rng.uniform(0, 255), rng.uniform(0, 255), rng.uniform(0, 255) );
//![update_value]
//![display]
imshow( window_name, dst );
//![display]
//![copymakeborder]
copyMakeBorder( src, dst, top, bottom, left, right, borderType, value );
//![copymakeborder]
//![check_keypress]
char c = (char)waitKey(500);
if( c == 27 )
{ break; }
else if( c == 'c' )
{ borderType = BORDER_CONSTANT; }
else if( c == 'r' )
{ borderType = BORDER_REPLICATE; }
//![check_keypress]
}
//![display]
imshow( window_name, dst );
//![display]
}
return 0;
return 0;
}
samples/java/tutorial_code/ImgTrans/MakeBorder/CopyMakeBorder.java
+94
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@@ -0,0 +1,94 @@
/**
* @file CopyMakeBorder.java
* @brief Sample code that shows the functionality of copyMakeBorder
*/
import org.opencv.core.*;
import org.opencv.highgui.HighGui;
import org.opencv.imgcodecs.Imgcodecs;
import java.util.Random;
class CopyMakeBorderRun {
public void run(String[] args) {
//! [variables]
// Declare the variables
Mat src, dst = new Mat();
int top, bottom, left, right;
int borderType = Core.BORDER_CONSTANT;
String window_name = "copyMakeBorder Demo";
Random rng;
//! [variables]
//! [load]
String imageName = ((args.length > 0) ? args[0] : "../data/lena.jpg");
// Load an image
src = Imgcodecs.imread(imageName, Imgcodecs.IMREAD_COLOR);
// Check if image is loaded fine
if( src.empty() ) {
System.out.println("Error opening image!");
System.out.println("Program Arguments: [image_name -- default ../data/lena.jpg] \n");
System.exit(-1);
}
//! [load]
// Brief how-to for this program
System.out.println("\n" +
"\t copyMakeBorder Demo: \n" +
"\t -------------------- \n" +
" ** Press 'c' to set the border to a random constant value \n" +
" ** Press 'r' to set the border to be replicated \n" +
" ** Press 'ESC' to exit the program \n");
//![create_window]
HighGui.namedWindow( window_name, HighGui.WINDOW_AUTOSIZE );
//![create_window]
//! [init_arguments]
// Initialize arguments for the filter
top = (int) (0.05*src.rows()); bottom = top;
left = (int) (0.05*src.cols()); right = left;
//! [init_arguments]
while( true ) {
//! [update_value]
rng = new Random();
Scalar value = new Scalar( rng.nextInt(256),
rng.nextInt(256), rng.nextInt(256) );
//! [update_value]
//! [copymakeborder]
Core.copyMakeBorder( src, dst, top, bottom, left, right, borderType, value);
//! [copymakeborder]
//! [display]
HighGui.imshow( window_name, dst );
//! [display]
//![check_keypress]
char c = (char) HighGui.waitKey(500);
c = Character.toLowerCase(c);
if( c == 27 )
{ break; }
else if( c == 'c' )
{ borderType = Core.BORDER_CONSTANT;}
else if( c == 'r' )
{ borderType = Core.BORDER_REPLICATE;}
//![check_keypress]
}
System.exit(0);
}
}
public class CopyMakeBorder {
public static void main(String[] args) {
// Load the native library.
System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
new CopyMakeBorderRun().run(args);
}
}
samples/python/tutorial_code/ImgTrans/MakeBorder/copy_make_border.py
+69
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@@ -0,0 +1,69 @@
"""
@file copy_make_border.py
@brief Sample code that shows the functionality of copyMakeBorder
"""
import sys
from random import randint
import cv2
def main(argv):
## [variables]
# First we declare the variables we are going to use
borderType = cv2.BORDER_CONSTANT
window_name = "copyMakeBorder Demo"
## [variables]
## [load]
imageName = argv[0] if len(argv) > 0 else "../data/lena.jpg"
# Loads an image
src = cv2.imread(imageName, cv2.IMREAD_COLOR)
# Check if image is loaded fine
if src is None:
print ('Error opening image!')
print ('Usage: copy_make_border.py [image_name -- default ../data/lena.jpg] \n')
return -1
## [load]
# Brief how-to for this program
print ('\n'
'\t copyMakeBorder Demo: \n'
' -------------------- \n'
' ** Press \'c\' to set the border to a random constant value \n'
' ** Press \'r\' to set the border to be replicated \n'
' ** Press \'ESC\' to exit the program ')
## [create_window]
cv2.namedWindow(window_name, cv2.WINDOW_AUTOSIZE)
## [create_window]
## [init_arguments]
# Initialize arguments for the filter
top = int(0.05 * src.shape[0]) # shape[0] = rows
bottom = top
left = int(0.05 * src.shape[1]) # shape[1] = cols
right = left
## [init_arguments]
while 1:
## [update_value]
value = [randint(0, 255), randint(0, 255), randint(0, 255)]
## [update_value]
## [copymakeborder]
dst = cv2.copyMakeBorder(src, top, bottom, left, right, borderType, None, value)
## [copymakeborder]
## [display]
cv2.imshow(window_name, dst)
## [display]
## [check_keypress]
c = cv2.waitKey(500)
if c == 27:
break
elif c == 99: # 99 = ord('c')
borderType = cv2.BORDER_CONSTANT
elif c == 114: # 114 = ord('r')
borderType = cv2.BORDER_REPLICATE
## [check_keypress]
return 0
if __name__ == "__main__":
main(sys.argv[1:])