BufferedImage Auto Rotate JPG
Apr 11, 2015
I need my Java program (I'm working in Eclipse if it matters) to detect if an image is a portrait or a landscape, but since i am directly downloading them from my camera they only have it written somewhere in metadata, the image width and height is the same for landscape and portrait. I have the rotation code and the rest of the program working, but I need to somehow get a variable (for example integer one) to tell me if it is a portrait or a landscape image. I tried getting to the metadata but my Eclipse decided that import com.drew.metadata.Metadata; cannot be resolved.
BufferedImage image = ImageIO.read(new File(imagePath, imageName)); and after I get the variable "orientation" it looks like this
int orientation = ???;
BufferedImage newImage = oldImage;
if (orientation>1){
newImage = rotate(oldImage);
}
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Sep 26, 2014
I am working on a project named as "Auto Click and Populate". This is link is like online feedback form / surveys which we program. I have a link with me which is mentioned below and there will be a counter box which will hit the link that much number of times.
Inputs:
-A text box having this link.
-A numeric box having counter number i.e. the number of times the link should be processed.
-A button named as process which will INITIATE the process.
Now say if I input 10 into the numeric box; the attached file contain link should be processed 10 times and the question which is coming on the link should be answered randomly out of the options which are present. For ex: When you will hit a link; the first question will be gender in that 3 options are present "Male", "Female" and "Prefer not to answer"; either of 1 out of 3 should be punched automatically and proceed automatically ahead. The punch(es) will be stored in database which is maintained at my end.I have done research and till now found the code for auto click only and not for auto process.
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Jul 27, 2014
What I am doing is loading a new image from resources in my project, so that I can get the size. Using this, I create a new BufferedImage with those dimensions. The following code is what I am using to take the original BufferedImage, and scale it.
Java Code:
public ImageIcon getBackImage(){
before = new BufferedImage((int)img.getWidth(null), (int)img.getHeight(null), BufferedImage.TYPE_INT_ARGB);
int w = before.getWidth();
int h = before.getHeight();
try{
URL url = getClass().getResource("/Blue_Back.png");
before = ImageIO.read(url);
[Code] ......
The scaling seems to be working fine, but what I have noticed is a line of approximately 10 pixels at the top of the image. I took the original image and blew it up to ensure that I wasn't just enlarging undesired portions and this wasn't the case. I then tried to fetch a subImage of the BufferedImage, and that also left the padding at the top. Is there something I am missing that is placing this undesired padding at the top of my bufferedImages ?
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Jun 30, 2014
I am making a 2d game engine and i was wonder is it better to use BufferedImages and subImages to store/render sprites from sprite sheets or use BufferedImages and store it in a pixel array and then manipulate the pixel array to do what you want.
Basically is loading in BufferedImage and getting the tile of the sprite sheet with subImages better than loading in a BufferedImage and then putting the data in a pixel array and making a new array with the part of the BufferedImage you want.what i have been told the BufferedImage and subImage use more of the graphics card and the pixel array method uses more of the processor.
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Apr 4, 2014
I need to write an image to a .png with a 255-color indexed color model. I know usually do it like this: Java Code: BufferedImage img=new BufferedImage(width,height,BufferedImage.TYPE_BYTE_INDEXED,model); mh_sh_highlight_all('java'); but that doesn't work with models with 255 colors (as opposed to 256 colors). I'm fairly sure it is the BufferedImage creation that is the problem, as when I call model.getMapSize(), it returns the correct size.
The extra color added to the image's index is 15,15,15.
Should I be something other than a BufferedImage to write the image, or should I be using a different constructor for BufferedImage, or am I doing something else wrong?
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Mar 16, 2015
I am new to JavaFX and OpenCV. The Problem is, that JavaFX can't handle Mat objects. First I load an image as a BufferedImage. Then i have to convert this to Mat. Do my image Processing with OpenCV and again convert the result image to a BufferedImage to display in on my UI. Here are the methods for converting Buff to Mat and Mat to Buff I found on the internet:
public static Mat img2Mat(BufferedImage image)
{
byte[] data = ((DataBufferByte) image.getRaster().getDataBuffer()).getData();
Mat mat = new Mat(image.getHeight(), image.getWidth(), CvType.CV_8UC3);
mat.put(0, 0, data);
return mat;
[Code] ....
Next I do some OpenCV stuff:
public static BufferedImage hello(BufferedImage img) {
Mat source = img2Mat(img); //Convert Buff to Mat
BufferedImage outImg = null;
try{
System.loadLibrary( Core.NATIVE_LIBRARY_NAME );
[Code] ....
Finally I call the hello method in my controller:
void menuItemTestFired(ActionEvent event) {
try {
result = ImageProc.hallo(bImage);//bImage is an image I've loaded before.
imageView.setImage(SwingFXUtils.toFXImage(result, null));
[Code] .....
Unfortunately I get a lot of errors. Here are the first one:
Caused by: java.lang.UnsatisfiedLinkError: org.opencv.core.Mat.n_Mat(III)J
at org.opencv.core.Mat.n_Mat(Native Method)
at org.opencv.core.Mat.<init>(Mat.java:471)
[Code] ....
Can't figure out why this doesn't work. -.-
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Mar 21, 2015
I'm working on a project based on Roger Alsing's Mona Lisa evolution.
My problem seems to be that when I compare the RGB values of the target image and the randomly generated image, I don't get a representative result of how "close" the two images are.
I load the target image (a 24-bit bitmap) using:
img = ImageIO.read(new File(filePath));
I draw onto a BufferedImage with:
for(int i = 0; i < numPolys*12; i += 12){
p[(int)(i/12)].addPoint(gene[i], gene[i+1]);
p[(int)(i/12)].addPoint(gene[i+2], gene[i+3]);
p[(int)(i/12)].addPoint(gene[i+4], gene[i+5]);
p[(int)(i/12)].addPoint(gene[i+6], gene[i+7]);
Color mycol = new Color(gene[i+8], gene[i+9], gene[i+10], gene[i+11]);
gf.setColor(mycol);
gf.fillPolygon(p[(int)(i/12)]);
}
And I compare the BufferedImage with the target image using:
for(int x = 0; x < inGene.x; ++x){
for(int y = 0; y < inGene.y; ++y){
Color mycol1 = new Color(exp.getRGB(x, y));
Color mycol2 = new Color(inImage.getRGB(x, y));
int delta = mycol1.getRed() - mycol2.getRed();
score += (delta * delta);
delta = mycol1.getGreen() - mycol2.getGreen();
score += (delta * delta);
delta = mycol1.getBlue() - mycol2.getBlue();
score += (delta * delta);
}
}
My problem is that my code runs to a certain point, where it seems no matter what happens to the image, it doesn't seem to get any closer to the target image.
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Jun 26, 2014
As implied by the title, when I am rendering images of the type "BufferedImage" unto a Swing application, the images' pixels are not consistent in size. Some might be larger than other, and some might be smaller than other.
Here is a screenshot of what I am talking about (you might need to zoom in a bit because the image is so small): [URL] ....
And here is also some code for you. The images are actually from a sprite sheet, which I first load in its entirety and then split up in an array.
Java Code:
public static BufferedImage sprites[];
...
public void loadSprites(){
try{
BufferedImage bigImage = ImageIO.read(new File("SOURCE/BLA/BLA/THIS/IS/ACTUALLY/NOT/THE/REAL/SOURCE/IN/CASE/YOU'RE/WONDERING/I/JUST/DON'T/WANT/YOU/TO/FIND/ME/AND/RAPE/ME"));
sprites = new BufferedImage[16 * 16];
[Code] ....
So, how do I make the pixels equally small?
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Feb 9, 2014
I've been working my way through a tutorial to build a simple 2D tile-based engine that also allows the code to manipulate the colour of pixels on the screen based on a monochrome map read from a file. I've got the code right line for line, but I seem to have a bug when it comes to draw to the screen! At regular intervals, despite what is held in the pixel array of ints (which I have confirmed to be correct when debugging), I get the same row of pixels being draw twice in a row. I figured there was some loop issue somewhere, but after attempting to debug this for some time, I haven't come up with the answer.
Original tilesheet:As rendered:
Game.java:
package igg.engine.game;
import igg.engine.game.gfx.Screen;
import igg.engine.game.gfx.SpriteSheet;
import java.awt.BorderLayout;
import java.awt.Canvas;
import java.awt.Color;
[Code] ....
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Apr 5, 2014
I have a list of Tabs which are dynamic depending on how many cars are in a database. If there are 10 cars there will be 10 tabs called car 1, car 2, car 3, etc. Each tab simply displays a photo and details of the car.
I have a JMenuItem that says start SlideShow and end SlideShow
What i would like to do is automatically slide through tabs when the start Slideshow is clicked.
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Jul 28, 2014
Is there any way to Rotate jPanel in java (without using Paint Function).
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Mar 11, 2015
i want to rotate this shape using AffineTransform without changing its position and its size. i want the arrow to be in a straight line. how can i proceed??
I have use this but the place of the arrow is changing.
AffineTransform at = new AffineTransform();
at.rotate(Math.toRadians(45));
c.transform(at);
here is my code for arrow
import javax.swing.SwingUtilities;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.BorderFactory;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
[Code]....
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May 23, 2014
I have been trying to rotate an image on a certain degree, and still remain on the same position. I have tried g.rotate, but it just rotate around a center, and it does not keep the same position as before.
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Jul 21, 2014
I have written a code to rotate a Jlabel but i am facing some problems.
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.MouseInfo;
import javax.imageio.ImageIO;
[Code] ....
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May 13, 2014
I'm trying to replicate the rol(rotate left) instruction in assembly though can only get as far as shifting the bits with '<<' or doing Long.rotateLeft(var, 5). Both of these method don't wrap around the bits as the rol instruction does.
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Mar 13, 2014
package id.ac.ub.ptiik.computergraphics;
import static org.lwjgl.opengl.GL11.*;
import static org.lwjgl.util.glu.GLU.*;
public class CG04_3DTransformation extends CGApplication {
protected boolean wireframe = true;
[Code] .....
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Jun 14, 2014
I am having a problem rotating a shape I am using the transformation rotation matrix and don't seem to be getting the results I expected. Now I know a lot of programmers will just tell me to use the Graphics2D rotate(theta) Method.But I would like to create this ability through writing the code.
package com.trigonometry;
import java.awt.Graphics;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.Timer;
[Code] ....
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Feb 23, 2015
So I need to create a square and make it rotate when the letter R is pressed and then make it stop when the letter R is pressed again. I need make it rotate using a maths equation that I can't figure it out myself right this moment.
Code for square:
package lab2;
public class Square {
public double [][] vertices = new double[4][2]; //not good to make this public
public Square(double x1, double y1, double x2, double y2, double x3, double y3, double x4, double y4) {
vertices[0][0]=x1;
vertices[0][1]=y1;
vertices[1][0]=x2;
[Code] ....
In the Square code there is a method to write an equation to rotate it but I can't figure that part out ....
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Aug 28, 2014
Since the upgrade to JavaFX 8u20 my ProgressIndicator won't rotate anymore when using Caspian style. Is there any workaround for this?
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.ProgressIndicator;
import javafx.stage.Stage;
public class TestApp2 extends Application {
public static void main(String[] args) {
[Code] ....
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Sep 13, 2014
How to write a program which will automatically correct the parts of speech of a document.
Example: say in my document I have My/PRONOUN name/PRONOUN is/VERB Jhon/NOUN. He/PRONOUN is/VERB going/ADJ to/PREPOSITION school/NOUN
Now I need to change My/PRONOUN name/NOUN is/VERB Jhon/NOUN. He/PRONOUN is/VERB going/VERB to/PREPOSITION school/NOUN...How to do using java. The document may contain 100 lines tagged with parts of speech.
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Oct 8, 2014
I wanted to make a small program to move a small rectangle by pressing the WASD keys. The program works, except that when I hold a key to move the rectangle, after a second, auto-repeat starts up, and the rectangle motion accelerates. I want to prevent automatic repeat to activate, so that the rectangle moves at a constant speed when I hold a key and stops when I released. Here is the ButtonMotion classe :
import java.awt.event.ActionEvent;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import javax.swing.AbstractAction;
import javax.swing.Action;
import javax.swing.JButton;
import javax.swing.KeyStroke;
[code]....
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Sep 5, 2014
I have swing UI designed and I want the components to resize when the frame is manually resized. The design is as shown in the fig Project UI.jpg
The panel 4 and panel 5 will change their contents according to the list item clicked. Panel 4 just has text area but panel 5 a panel with numerous components as label, combo box, text field,check box will be present.Now if the frame resizes, I won't all the components to resize according to the frame size.
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Jul 23, 2014
I'm learning about abstract classes and I have to create an abstract auto class with make and price of a car, then two classes with a different type of car, and finally a main to use them. Everything seems to work and when I run it it's fine but I do get an error on the main that I'm not using the local variable buick1 and acura1.I'm curious because, while it runs for me, I want to make sure I'm doing it right and don't know of another way to do the output than this. I've put all four classes but the issue is on the last one (5 and 7).
public abstract class Auto
{
protected String makeCar;
protected double priceCar;
public Auto(String newMake)
{
makeCar = newMake;
[code]....
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Oct 1, 2014
[java] I am using eclipse luna and it auto terminates as soon as it starts it just terminates?
import java.util.Scanner;
public class data {
public static void main(String args[]){
Scanner input = new Scanner (System.in);
}
}
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Feb 10, 2015
I'm doing an application which needs a JTable with data from an existing database. I need the table to periodically (I plan to use a Timer) reflect the changes made to the DB (inserting new rows, deleting or updating existing rows) without making the dirty approach of clearing the whole JTable and refilling it again, which is not nice. I need to just add/modify/delete the needed rows, not the whole table.
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Apr 30, 2015
I have to write a resize method so that when my Bucket gets to a certain point, then it resizes the bucket when it is called. What is happening is, I am getting strange results when I run the method. My mean bucket length should be at 2.5 for the last insertion, but I am getting something like 0.1346. Here is my dictionary class
// The "Dictionary" class.
// The Dictionary class implemented using hashing. Hash buckets are used. A dictionary contains a set of data elements with corresponding keys. Each element is inserted into the dictionary with a key. Later the key can be used to look up the element. Using the key, an element can be changed or it can be deleted from the dictionary. There is also an operation for checking to see if the dictionary is empty.
package dictionary;
public class Dictionary {
protected final static int MAX_BUCKETS = 1000; // number of buckets
protected DictHashEntry[] buckets; // the bucket array
private int collisionCount = 0;
[Code] .....
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