How to flip a Bitmap upside down?
(I need this for loading an OpenGL texture in another program).
Here is my failed try:
stripe.png (courtesy of Pitr#OpenClipart):
Flip.java:
import net.rim.device.api.system.*;
import net.rim.device.api.ui.*;
import net.rim.device.api.ui.component.*;
import net.rim.device.api.ui.container.*;
public class Flip extends UiApplication {
public static void main(String args[]) {
Flip app = new Flip();
app.enterEventDispatcher();
}
public Flip() {
pushScreen(new MyScreen());
}
}
class MyScreen extends MainScreen {
static final Bitmap STRIPE = flip(Bitmap.getBitmapResource("stripe.png"));
public MyScreen() {
setTitle("Flip the bitmap");
add(new BitmapField(STRIPE));
add(new ButtonField("Hello world"));
}
static Bitmap flip(Bitmap bitmap) {
int[] argb = new int[bitmap.getWidth() * bitmap.getHeight()];
bitmap.getARGB(argb, 0, bitmap.getWidth(), 0, 0, bitmap.getWidth(), bitmap.getHeight());
for (int i = 0; i < bitmap.getHeight(); i++) {
for (int j = 0; j < bitmap.getWidth(); j++) {
int swap = argb[i * bitmap.getWidth() + j];
argb[(bitmap.getHeight() - 1 - i) * bitmap.getWidth() + j] = swap;
}
}
bitmap.setARGB(argb, 0, bitmap.getWidth(), 0, 0, bitmap.getWidth(), bitmap.getHeight());
return bitmap;
}
}
Try using this bit of code:
for (int y = 0; y < bitmap.getHeight() / 2; y++) {
int upper_row = bitmap.getWidth() * y;
int lower_row = bitmap.getWidth() * (bitmap.getHeight() - 1 - y);
for (int x = 0; x < bitmap.getWidth(); x++) {
int temp = argb[upper_row + x];
argb[upper_row + x] = argb[lower_row + x];
argb[lower_row + x] = temp;
}
}
public Bitmap flip(Bitmap bitmap) {
int[] argb = new int[bitmap.getWidth() * bitmap.getHeight()];
int[] argb_flip = new int[bitmap.getWidth() * bitmap.getHeight()];
bitmap.getARGB(argb, 0, bitmap.getWidth(), 0, 0, bitmap.getWidth(), bitmap.getHeight());
for (int i = 0; i < bitmap.getHeight(); i++) {
for (int j = 0; j < bitmap.getWidth(); j++) {
int swap = argb[i * bitmap.getWidth() + j];
argb_flip[(bitmap.getHeight() - 1 - i) * bitmap.getWidth() + j] = swap;
}
}
bitmap.setARGB(argb_flip, 0, bitmap.getWidth(), 0, 0, bitmap.getWidth(), bitmap.getHeight());
return bitmap;
}
Try this, surely it will help you to flip the image by 180 degrees.
Related
I'm trying to write the simplest possible image comparison function.
The idea is to have a target image and a collection of n number of different images.
The goal is to pick the image which is most similar to the target image.
So far my method consists of defining the euclidean HSB distance from pixel to pixel in a resized image and have been trying to do a PImage function that returns the winner image. I already wrote a float function that ranks the image list from winner to loser but I would like to skip this step to make the process way more concise.
The issue is at the PImage difference(PImage){
function, the program outputs an error on the line:
float x1 = brightness(imageKey.pixels[i]);
The error is ArrayIndexOutOfBoundsException
Here's the entire code:
//CLICK ON S TO SAVE FRAMES TO FOLDER
int series = 50; //
PImage[] collection = new PImage[series];
PImage imageKey,imageKey2, imageKeyHUE, imageKeySUM, imageKeySAT; //target image alias with ready operations
int imageWidth = 800;
int leftAlign = 850 ;
void setup()
{
size(1200,600);
background(255);
frameRate(random(1,10.0));
for ( int i = 0; i< collection.length; i++ )
{
collection[i] = loadImage( "Image_"+ i + ".jpg" );
}
//_____________________________________________TARGET IMAGE AND NAME TEXT
textSize(10);
fill(0);
text("target image", leftAlign, 220);
textSize(15);
text("central london", leftAlign, 240);
text("comparison methods", leftAlign, 290);
//_____________________________________________________________________BUTTONS
imageKey = loadImage("Image_0.jpg");
imageKey.resize(240, 180);
image(imageKey, leftAlign,25);
imageKeySAT= loadImage("Image_0.jpg");
imageKeySAT.resize(60,60);
imageKeySAT = saturation(imageKeySAT);
image(imageKeySAT, leftAlign+140,300);
imageKeySUM = loadImage("Image_0.jpg");
imageKeySUM.resize(60,60);
imageKeySUM = sum(imageKeySUM);
image(imageKeySUM, leftAlign+70,300);
imageKeyHUE = loadImage("Image_0.jpg");
imageKeyHUE.resize(60,60);
imageKeyHUE = hue(imageKeyHUE);
image(imageKeyHUE, leftAlign,300);
textSize(20);
text("CLICK HERE TO", leftAlign, 430);
text("STOP AT WINNER", leftAlign, 450);
}
void draw()
{
//______________________________________________SHOW IMAGES ARRAY
image(collection[int(random(0,series))],0,0);
//______________________________________________HISTOGRAMS
histogramhue();
histogramsat();
histogrambright();
//______________________________________________SUM METHOD
//float Vector_Approach(PImage sumSatin){
//}
}
void keyPressed()
{
if(key=='s') saveFrame("images/image-######.jpg");
}
PImage difference(PImage satin)
{
colorMode(HSB);
satin.loadPixels();
imageKey.loadPixels();
PImage satout = createImage(satin.width, satin.height, RGB);
satout.loadPixels();
for(int i = imageWidth; i<satout.pixels.length-imageWidth; i++)
{
float x1 = brightness(imageKey.pixels[i]);
float b0 = brightness(satin.pixels[i]);
// float y1 = brightness(satin.pixels[i+1]);
float value = x1-b0;
satout.pixels[i] = color(0,0,value);
}
satout.updatePixels();
return satout;
}
void mouseReleased(){
//______________________________________________BUTTON OVER
for ( int i = 0; i< collection.length; i++ )
if (mouseX > leftAlign && mouseX < (leftAlign + 60) && mouseY > 300 && mouseY < 360){
collection[i] = loadImage( "Image_"+ i + ".jpg" );
collection[i] = hue(collection[i]); histogramhue();
noStroke(); fill(255); rect(leftAlign,360,200,40); fill(0);
textSize(10);text("comparison by hue", leftAlign, 380);
} else if (mouseX > (leftAlign + 70) && mouseX < (leftAlign + 130) && mouseY > 300 && mouseY < 360)
{
collection[i] = loadImage( "Image_"+ i + ".jpg" );
collection[i] = sum(collection[i]);
noStroke(); fill(255); rect(leftAlign,360,200,40); fill(0);
textSize(10);text("comparison by sum", leftAlign, 380);
}else if (mouseX > (leftAlign + 140) && mouseX < (leftAlign + 200) && mouseY > 300 && mouseY < 360)
{
collection[i] = loadImage( "Image_"+ i + ".jpg" );
collection[i] = saturation(collection[i]);
noStroke(); fill(255); rect(leftAlign,360,200,40); fill(0);
textSize(10);text("comparison by saturation", leftAlign, 380);
}else if (mouseX > leftAlign && mouseX < 1200 && mouseY > 340 && mouseY < 600)
{
collection[i] = loadImage( "Image_"+ i + ".jpg" );
collection[i] = difference(collection[i]);
noStroke(); fill(255); rect(leftAlign,360,200,40); fill(0);
textSize(10);text("WINNER IMAGE!!!!", leftAlign, 380);
}else{
collection[i] = loadImage( "Image_"+ i + ".jpg" );
noStroke(); fill(255); rect(leftAlign,360,200,40); fill(0);
}
}
/* HSB PImage Methods */
//HUE -------> /** CHOSEN METHOD**/
//SATURATION -------> /** CHOSEN METHOD**/
//SUM -------> /** CHOSEN METHOD**/
PImage hue(PImage satin)
{
colorMode(HSB);
satin.loadPixels();
PImage satout = createImage(satin.width, satin.height, HSB);
satout.loadPixels();
for (int j = 0; j < satout.pixels.length; j++)
{
satout.pixels[j] = color(hue(satin.pixels[j]),255,255);
}
satout.updatePixels();
return satout;
}
PImage saturation(PImage satin)
{
colorMode(HSB);
satin.loadPixels();
PImage satout = createImage(satin.width, satin.height, RGB);
satout.loadPixels();
for (int j = 0; j < satout.pixels.length; j++)
{
satout.pixels[j] = color(saturation(satin.pixels[j]));
}
satout.updatePixels();
//colorMode(RGB);
return satout;
}
PImage sum(PImage satin)
{
colorMode(HSB);
satin.loadPixels();
PImage satout = createImage(satin.width, satin.height, RGB);
satout.loadPixels();
for(int i = imageWidth; i<satout.pixels.length-imageWidth; i++)
{
float b0 = brightness(satin.pixels[i]);
float x1 = brightness(satin.pixels[i-1]);
float y1 = brightness(satin.pixels[i-imageWidth]);
float xdiff = b0-x1;
float ydiff = b0-y1;
float value = (510 + xdiff + ydiff)/3;
satout.pixels[i] = color(0,0,value);
}
satout.updatePixels();
return satout;
}
//REFERENCE HISTOGRAM TAKEN FROM A PROGRAMMING HANDBOOK FOR VISUAL DESIGNERS AND ARTISTS BY BEN FRY ET AL
void histogramhue(){
PImage img = loadImage("Image_0.jpg");
int[] hist = new int[600];
// Calculate the histogram
for (int i = 0; i < img.width; i++) {
for (int j = 0; j < img.height; j++) {
int hue = int(hue(get(i, j)));
hist[hue]++;
}
}
int histMax = max(hist);
stroke(255,250); strokeWeight(5);
// Draw half of the histogram (skip every second value)
for (int i = 0; i < img.width; i += 20) {
int which = int(map(i, 0, img.width, 0, 255));
int y = int(map(hist[which], 0, histMax, img.height, 0));
line(i, img.height, i, y);
}}
void histogramsat(){
PImage img = loadImage("Image_0.jpg");
int[] hist = new int[600];
for (int i = 0; i < img.width; i++) {
for (int j = 0; j < img.height; j++) {
int sat = int(saturation(get(i, j)));
hist[sat]++;
}
}
int histMax = max(hist);
stroke(255,150);strokeWeight(10);
for (int i = 0; i < img.width; i += 20) {
int which = int(map(i, 0, img.width, 0, 255));
int y = int(map(hist[which], 0, histMax, img.height, 0));
line(i, img.height, i, y);
}}
void histogrambright(){
PImage img = loadImage("Image_0.jpg");
int[] hist = new int[600];
for (int i = 0; i < img.width; i++) {
for (int j = 0; j < img.height; j++) {
int bright = int(brightness(get(i, j)));
hist[bright]++;
}
}
int histMax = max(hist);
stroke(255, 150);strokeWeight(20);
for (int i = 0; i < img.width; i += 20) {
int which = int(map(i, 0, img.width, 0, 255));
int y = int(map(hist[which], 0, histMax, img.height, 0));
line(i, img.height, i, y);
}}
In isolation your function does seem to work:
PImage imageKey,testImage;
int imageWidth = 800;
int imageHeight = 600;
void setup(){
size(1600,600);
//fake imageKey
imageKey = getNoise(imageWidth,imageHeight);
//fake test image
testImage = getNoise(imageWidth,imageHeight);
image(testImage,0,0);
image(difference(testImage),800,0);
}
PImage getNoise(int width,int height){
PImage out = createImage(width,height,RGB);
for(int i = 0 ; i < out.pixels.length; i++)
out.pixels[i] = color(random(255),random(255),random(255));
out.updatePixels();
return out;
}
PImage difference(PImage satin)
{
colorMode(HSB);
satin.loadPixels();
imageKey.loadPixels();
PImage satout = createImage(satin.width, satin.height, RGB);
satout.loadPixels();
for (int i = imageWidth; i<satout.pixels.length-imageWidth; i++)
{
float x1 = brightness(imageKey.pixels[i]);
float b0 = brightness(satin.pixels[i]);
// float y1 = brightness(satin.pixels[i+1]);
float value = x1-b0;
//println(i,x1,b0,x1-b0,value);
satout.pixels[i] = color(0, 0, value);
}
satout.updatePixels();
return satout;
}
I can't test your actual setup as I don't have access to your images, but the ArrayIndexOutOfBoundsException is probably because your i counter goes beyond the number of pixels in imageKey. You can test this by putting checking if i < imageKey.pixels.length. My guess is the images aren't the same dimensions and therefore don't have the same number of pixels.
Other notes that are going slightly off-topic:
Your difference() function is tightly coupled to the imageKey and imageWidth variables. You might want to make your functions loosely coupled so they can be reused easily in other contexts. You could start by making these two variables extra parameters/arguments of the function
You might also want to look at euclidean distance between colours (in a perceptual colour space such as Lab*). Have a look at this answer.Even though it's an OpenFrameworks answer, it should be easy to adapt to Processing's color and PVector types.
I'm working on Image processing with javaFx. I think that my code is not enouth efficient (With HD images, refresh is very slow). Because I do a for on each pixel of my image everytime I have to refresh it. But I don't know how to do differently.
So I need help to improve the performance of my processing.
This is my code :
import javafx.application.Application;
import javafx.beans.InvalidationListener;
import javafx.beans.Observable;
import javafx.beans.property.DoubleProperty;
import javafx.scene.Scene;
import javafx.scene.control.ScrollPane;
import javafx.scene.control.Slider;
import javafx.scene.image.Image;
import javafx.scene.image.ImageView;
import javafx.scene.image.PixelReader;
import javafx.scene.image.PixelWriter;
import javafx.scene.image.WritableImage;
import javafx.scene.layout.AnchorPane;
import javafx.scene.paint.Color;
import javafx.stage.Stage;
public class Example extends Application {
private Image src;
private WritableImage dest;
private int width;
private int height;
int value = 0;
#Override
public void start(Stage stage) {
AnchorPane root = new AnchorPane();
initImage(root);
Scene scene = new Scene(root);
stage.setTitle("Demo processing");
stage.setResizable(false);
stage.setScene(scene);
stage.show();
}
private void initImage(AnchorPane root) {
src = new Image(
"http://mikecann.co.uk/wp-content/uploads/2009/12/ScreenHunter_02-Dec.-10-19.41-1024x484.jpg");
width = (int) src.getWidth();
height = (int) src.getHeight();
root.setPrefSize(800, 800 + 50);
ScrollPane scrollPane = new ScrollPane();
scrollPane.setPrefHeight(600);
scrollPane.setPrefWidth(1000);
dest = new WritableImage(width, height);
ImageView destView = new ImageView(dest);
scrollPane.setContent(destView);
root.getChildren().add(scrollPane);
AnchorPane.setTopAnchor(scrollPane, 0.0);
Slider slider = new Slider(0, 255, 1);
slider.setPrefSize(800, 50);
slider.setShowTickLabels(true);
slider.setShowTickMarks(true);
slider.setSnapToTicks(true);
slider.setMajorTickUnit(1.0);
slider.setMinorTickCount(0);
slider.setLayoutY(700);
slider.valueProperty().addListener(new InvalidationListener() {
#Override
public void invalidated(Observable o) {
value = (int) ((DoubleProperty) o).get();
color();
}
});
root.getChildren().add(slider);
color();
}
private void color() {
PixelReader reader = src.getPixelReader();
PixelWriter writer = dest.getPixelWriter();
for (int x = 0; x < width; x++) {
for (int y = 0; y < height; y++) {
Color color = reader.getColor(x, y);
double red = (double) value * x * y / (width * height) / 255;
double green = color.getGreen();
double blue = (double) value * ((width * height) - x * y)
/ (width * height) / 255;
writer.setColor(x, y, Color.color(red, green, blue));
}
}
}
public static void main(String[] args) {
launch(args);
}
}
And this is with a full HD image :
src = new Image(
"http://www.freedomwallpaper.com//nature-wallpaper-hd/hd_sunshine_hd.jpg");
Getitng color of each pixel in loop is too slow. So, get entire pixels first, and change colors, finally wirte changed colors with PixelWriter.
Like this
private void color() {
PixelReader reader = src.getPixelReader();
WritablePixelFormat<IntBuffer> format = WritablePixelFormat.getIntArgbInstance();
int[] pixels = new int[width * height]; // Buffer for all pixels
reader.getPixels(0, 0, width, height, format, pixels, 0, width); // get all pixels by argb format
int alpha = 0xFF << 24;
for (int x = 0; x < width; x++) {
for (int y = 0; y < height; y++) {
int index = x + y * width;
int argb = pixels[index];
int red = value * x * y / (width * height);
int green = (argb >> 8) & 0xFF;
int blue = value * ((width * height) - x * y)
/ (width * height);
int newArgb = alpha | (red << 16) | (green << 8) | blue;
pixels[index] = newArgb;
}
}
PixelWriter writer = dest.getPixelWriter();
writer.setPixels(0, 0, width, height, format, pixels, 0, width); // write entire image
}
I want to set focus on first element or item of listfield. The problem is that I set focus from other field (not within the list field).
protected boolean navigationMovement(int dx, int dy, int status, int time) {
while (dy > 0) {
// How to jump into listfield?
Field f = ???
if (f.isFocusable()) {
f.setFocus();
dy--;
}
}
}
Here is my Listfield class.
public class Custom_ListField extends ListField {
private String[] title, category, date, imagepath;
private int[] newsid, catsid;
private List_News newslist;
private Bitmap imagebitmap[], localimage = Config_GlobalFunction
.Bitmap("image_base.png");
private BrowserField webpage;
private boolean islatest;
private Vector content = null, text;
private ListCallback callback = null;
private int currentPosition = 0, j;
private Util_LazyLoader loader;
public Custom_ListField(Vector content, boolean islatest) {
this.content = content;
this.islatest = islatest;
newsid = new int[content.size()];
title = new String[content.size()];
category = new String[content.size()];
date = new String[content.size()];
imagepath = new String[content.size()];
catsid = new int[content.size()];
imagebitmap = new Bitmap[content.size()];
for (int i = 0; i < content.size(); i++) {
newslist = (List_News) content.elementAt(i);
newsid[i] = newslist.getID();
title[i] = newslist.getNtitle();
category[i] = newslist.getNewCatName();
date[i] = newslist.getNArticalD();
imagepath[i] = newslist.getImagePath();
catsid[i] = newslist.getCatID();
if (!imagepath[i].toString().equals("no picture"))
imagebitmap[i] = localimage;
}
initCallbackListening();
Main.getUiApplication().invokeLater(new Runnable() {
public void run() {
for (j = 0; j < imagepath.length; j++) {
if (!imagepath[j].toString().equals("no picture")
&& Config_GlobalFunction.isConnected()) {
loader = new Util_LazyLoader(imagepath[j],
new Util_BitmapDowloadListener() {
public void ImageDownloadCompleted(
Bitmap bmp) {
imagebitmap[j] = bmp;
invalidate();
}
});
loader.run();
}
}
}
}, 500, false);
}
private void initCallbackListening() {
callback = new ListCallback();
this.setCallback(callback);
this.setRowHeight(-2);
}
private class ListCallback implements ListFieldCallback {
public ListCallback() {
}
public void drawListRow(ListField listField, Graphics graphics,
final int index, int y, int width) {
currentPosition = index;
if (!imagepath[index].toString().equals("no picture")) {
float ratio = (float) ((float) localimage.getHeight() / (float) imagebitmap[index]
.getHeight());
Bitmap temp = new Bitmap(
(int) (imagebitmap[index].getWidth() * ratio),
(int) (imagebitmap[index].getHeight() * ratio));
imagebitmap[index].scaleInto(temp, Bitmap.FILTER_BILINEAR,
Bitmap.SCALE_TO_FIT);
imagebitmap[index] = temp;
graphics.drawBitmap(
Display.getWidth()
- localimage.getWidth()
- 5
+ ((localimage.getWidth() - imagebitmap[index]
.getWidth()) / 2),
y
+ (listField.getRowHeight(index) - imagebitmap[index]
.getHeight()) / 2,
imagebitmap[index].getWidth(),
imagebitmap[index].getHeight(), imagebitmap[index], 0,
0);
graphics.setColor(Color.BLACK);
text = Config_GlobalFunction
.wrap(title[index], Display.getWidth()
- imagebitmap[index].getWidth() - 15);
for (int i = 0; i < text.size(); i++) {
int liney = y + (i * Font.getDefault().getHeight());
graphics.drawText(
(String) text.elementAt(i),
5,
liney + 3,
DrawStyle.TOP | DrawStyle.LEFT | DrawStyle.ELLIPSIS,
Display.getWidth() - imagebitmap[index].getWidth()
- 10);
}
} else {
graphics.setColor(Color.BLACK);
text = Config_GlobalFunction.wrap(title[index],
Display.getWidth() - 10);
for (int i = 0; i < text.size(); i++) {
int liney = y + (i * Font.getDefault().getHeight());
graphics.drawText(
(String) text.elementAt(i),
5,
liney + 3,
DrawStyle.TOP | DrawStyle.LEFT | DrawStyle.ELLIPSIS,
Display.getWidth() - 10);
}
}
if (text.size() == 2) {
graphics.setColor(Color.GRAY);
graphics.drawText(date[index], 5, y
+ Font.getDefault().getHeight() + 3);
if (islatest) {
graphics.setColor(Color.RED);
graphics.drawText(category[index], Font.getDefault()
.getAdvance(date[index]) + 15, y
+ Font.getDefault().getHeight() + 3);
}
} else if (text.size() == 3) {
graphics.setColor(Color.GRAY);
graphics.drawText(date[index], 5, y
+ Font.getDefault().getHeight() * 2 + 3);
if (islatest) {
graphics.setColor(Color.RED);
graphics.drawText(category[index], Font.getDefault()
.getAdvance(date[index]) + 15, y
+ Font.getDefault().getHeight() * 2 + 3);
}
}
if (!imagepath[index].toString().equals("no picture"))
setRowHeight(index, imagebitmap[index].getHeight() + 10);
else {
if (text.size() == 2)
setRowHeight(index, getRowHeight() + 9);
else if (text.size() == 3) {
setRowHeight(index, getRowHeight() * 15 / 10 + 9);
}
}
graphics.setColor(Color.WHITE);
graphics.drawRect(0, y, width, listField.getRowHeight(index));
}
public Object get(ListField listField, int index) {
return content.elementAt(index);
}
public int getPreferredWidth(ListField listField) {
return Display.getWidth();
}
public int indexOfList(ListField listField, String prefix, int start) {
return content.indexOf(prefix, start);
}
}
public int getCurrentPosition() {
return currentPosition;
}
protected boolean navigationClick(int status, int time) {
final int index = getCurrentPosition();
Main.getUiApplication().pushScreen(new Custom_LoadingScreen(1));
Main.getUiApplication().invokeLater(new Runnable() {
public void run() {
if (catsid[index] == 9) {
if (Config_GlobalFunction.isConnected()) {
webpage = new BrowserField();
MainScreen aboutus = new Menu_Aboutus();
aboutus.add(webpage);
Main.getUiApplication().pushScreen(aboutus);
webpage.requestContent("http://www.orientaldaily.com.my/index.php?option=com_k2&view=item&id="
+ newsid[index]
+ ":&Itemid=223"
+ Database_Webservice.ht_params);
} else
Config_GlobalFunction.Message(
Config_GlobalFunction.nowifi, 1);
} else {
Main.getUiApplication().pushScreen(
new Main_NewsDetail(newsid[index]));
}
}
}, 1 * 1000, false);
return true;
}
}
I tried to use .get but when I check isFocusable(), it returns me NullPointerException.
I'm not sure how to get the correct field.
Finally i found the solution.
It consists of two layers field. Outer one must set to listfield, after that inner one set to first element.
while (dy > 0) {
Field f = listfield;
if (f.isFocusable()) {
f.setFocus(); //outer field
listfield.setSelectedIndex(0); //inner field
dy--;
}
}
I am new to blackberry.
I am trying to convert normal image into sketch effect.I have code to do that in ANDROID.
I have tried to implement it in Blackberry but unable to got output.Here is android code and my blackberry code.
This is android code-
public class ConvolutionMatrix
{
public static final int SIZE = 3;
public double[][] Matrix;
public double Factor = 1;
public double Offset = 1;
public ConvolutionMatrix(int size) {
Matrix = new double[size][size];
}
public void setAll(double value) {
for (int x = 0; x < SIZE; ++x) {
for (int y = 0; y < SIZE; ++y) {
Matrix[x][y] = value;
}
}
}
public void applyConfig(double[][] config) {
for(int x = 0; x < SIZE; ++x) {
for(int y = 0; y < SIZE; ++y) {
Matrix[x][y] = config[x][y];
}
}
}
public static Bitmap computeConvolution3x3(Bitmap src, ConvolutionMatrix matrix) {
int width = src.getWidth();
int height = src.getHeight();
Bitmap result = Bitmap.createBitmap(width, height, src.getConfig());
int A, R, G, B;
int sumR, sumG, sumB;
int[][] pixels = new int[SIZE][SIZE];
for(int y = 0; y < height - 2; ++y) {
for(int x = 0; x < width - 2; ++x) {
// get pixel matrix
for(int i = 0; i < SIZE; ++i) {
for(int j = 0; j < SIZE; ++j) {
pixels[i][j] = src.getPixel(x + i, y + j);
}
}
// get alpha of center pixel
A = Color.alpha(pixels[1][1]);
// init color sum
sumR = sumG = sumB = 0;
// get sum of RGB on matrix
for(int i = 0; i < SIZE; ++i) {
for(int j = 0; j < SIZE; ++j) {
sumR += (Color.red(pixels[i][j]) * matrix.Matrix[i][j]);
sumG += (Color.green(pixels[i][j]) * matrix.Matrix[i][j]);
sumB += (Color.blue(pixels[i][j]) * matrix.Matrix[i][j]);
}
}
// get final Red
R = (int)(sumR / matrix.Factor + matrix.Offset);
if(R < 0) { R = 0; }
else if(R > 255) { R = 255; }
// get final Green
G = (int)(sumG / matrix.Factor + matrix.Offset);
if(G < 0) { G = 0; }
else if(G > 255) { G = 255; }
// get final Blue
B = (int)(sumB / matrix.Factor + matrix.Offset);
if(B < 0) { B = 0; }
else if(B > 255) { B = 255; }
// apply new pixel
result.setPixel(x + 1, y + 1, Color.argb(A, R, G, B));
}
}
// final image
return result;
}
}
and following is my Blackberry code that I have tried-
public ConvolutionMatrix(int size) {
Matrix = new double[size][size];
}
public void setAll(double value) {
for (int x = 0; x < SIZE; ++x) {
for (int y = 0; y < SIZE; ++y) {
Matrix[x][y] = value;
}
}
}
public void applyConfig(double[][] config) {
for(int x = 0; x < SIZE; ++x) {
for(int y = 0; y < SIZE; ++y) {
Matrix[x][y] = config[x][y];
}
}
}
public static Bitmap computeConvolution3x3(Bitmap src, ConvolutionMatrix matrix) {
int width = src.getWidth();
int height = src.getHeight();
int A, R, G, B;
int sumR, sumG, sumB;
int[] argb= new int[width*height];
int[][]newargb=new int[width][height];
src.getARGB(argb, 0, width, 0, 0, width, height);
for(int y=0;y<=height;y++)
{
for (int x=0;x<=width;x++)
{
System.out.println(""+x);
System.out.println(""+y);
newargb[y][x]=argb[width*y+x];
}
}
int[][] pixels = new int[SIZE][SIZE];
for(int y = 0; y < height - 2; ++y) {
for(int x = 0; x < width - 2; ++x) {
// get pixel matrix
for(int i = 0; i < SIZE; ++i) {
for(int j = 0; j < SIZE; ++j) {
pixels[i][j] = newargb[x + i][ y + j];
}
}
A=pixels[1][1];
sumR = sumG = sumB = 0;
for(int i = 0; i < SIZE; ++i) {
for(int j = 0; j < SIZE; ++j) {
A =pixels[i][j] >> 24;
R =pixels[i][j]>> 16 & 0xFF;
G =pixels[i][j] >> 8 & 0xFF;
B =pixels[i][j] & 0xFF;
sumR += (R * matrix.Matrix[i][j]);
sumG += (G * matrix.Matrix[i][j]);
sumB += (B * matrix.Matrix[i][j]);
}
}
// get final Red
R = (int)(sumR / matrix.Factor + matrix.Offset);
if(R < 0) { R = 0; }
else if(R > 255) { R = 255; }
// get final Green
G = (int)(sumG / matrix.Factor + matrix.Offset);
if(G < 0) { G = 0; }
else if(G > 255) { G = 255; }
// get final Blue
B = (int)(sumB / matrix.Factor + matrix.Offset);
if(B < 0) { B = 0; }
else if(B > 255) { B = 255; }
for(int i = 0; i < SIZE; ++i) {
for(int j = 0; j < SIZE; ++j) {
pixels[i][j]=(A << 24) | (R << 16) | (G << 8) | B;
newargb[x ][ y]=pixels[i][j];
}
}
}
}
for(int y=0;y<=height;y++)
{
for (int x=0;x<=width;x++)
{
argb[width*y+x]=newargb[y][x];
}
}
src.setARGB(argb, 0, width, 0, 0, width, height);
return src;
}
}
Common Code for both android and Blackberry-
public Bitmap EmbossImage(Bitmap src) {
System.out.println("In Emboss Effect Image method");
double[][] SharpConfig = new double[][] {
{ 0 , -1, 0 },
{ -1, 5, -1 },
{ 0 , -1, 0 }
};
ConvolutionMatrix convMatrix = new ConvolutionMatrix(3);
convMatrix.setAll(0);
convMatrix.applyConfig(SharpConfig);
convMatrix.Factor = 1;
convMatrix.offset=130;
return ConvolutionMatrix.computeConvolution3x3(src, convMatrix);
}
I have found the answer for my own question.I found convolution related code from this site:
android image processing.
See in the comments part on this link page.
This is android code.Just make it compatible it for blackberry by changing Color class methods.
Hi I want to convert normal image into mirror i.e flop effect in BLACKBERRY app.I have tried this code but unable too convert...Is there anyone to help me to do this...
If you have a different logic to do this please share..
public Bitmap changetoFlopEffect(Bitmap bitmap){
int[] argb = new int[bitmap.getWidth() * bitmap.getHeight()];
int[] newargb =new int[bitmap.getWidth() * bitmap.getHeight()];
int length=bitmap.getWidth();
bitmap.getARGB(argb, 0, bitmap.getWidth(), 0, 0, bitmap.getWidth(), bitmap.getHeight());
for(int i=0;i<=bitmap.getHeight();i++)
{
for(int j=bitmap.getWidth(),k=0;j>0;j--)
{
//newargb[k]=argb[j];
int swap=argb[j];
newargb[k]=swap;
k++;
}
}
bitmap.setARGB(newargb,0,bitmap.getWidth(),0,0,bitmap.getWidth(),bitmap.getHeight());
return bitmap;
}
Your corner conditions seem wrong and the pixels you swipe are from the first row only. Try this:
public Bitmap changetoFlopEffect(Bitmap bitmap){
int[] argb = new int[bitmap.getWidth() * bitmap.getHeight()];
int[] newargb =new int[bitmap.getWidth() * bitmap.getHeight()];
int length=bitmap.getWidth();
int newIndex = 0;
bitmap.getARGB(argb, 0, bitmap.getWidth(), 0, 0, bitmap.getWidth(), bitmap.getHeight());
for (int i = 0; i < bitmap.getHeight(); i++)
for (int j = bitmap.getWidth()-1; j >= 0 ; j--){
newargb[newIndex] = argb[i * bitmap.getWidth() + j];
newIndex++;
}
bitmap.setARGB(newargb,0,bitmap.getWidth(),0,0,bitmap.getWidth(),bitmap.getHeight());
return bitmap;
}