import java.awt.Color;
import java.awt.image.BufferedImage;
import java.awt.Image;
import java.awt.Graphics2D;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import javax.imageio.stream.ImageOutputStream;
import javax.imageio.stream.ImageInputStream;
import javax.imageio.metadata.IIOMetadata;
import javax.imageio.IIOImage;
import javax.imageio.ImageIO;
import javax.imageio.ImageWriteParam;
import javax.imageio.ImageWriter;
import javax.imageio.ImageReader;
import javax.imageio.ImageTypeSpecifier;
public class Pics {
private final String inDir = "images/"; // location of images
private final String outDir = "images/tmp/"; // location of created files
private final String greyDir = "images/tmp/greyscale/";
private final String redDir = "images/tmp/red/";
private final String blueDir = "images/tmp/blue/";
private final String greenDir = "images/tmp/green/";
private String inFile;
private String resizedFile;
private String redFile;
private String greenFile;
private String blueFile;
private String greyscaleFile;
private String asciiFile;
private String ext; // extension of file
private long bytes;
private int width;
private int height;
// Constructor obtains attributes of picture
public Pics(String name, String ext)
{
this.ext = ext;
this.inFile = this.inDir + name + "." + ext;
this.resizedFile = this.outDir + name + "." + ext;
this.greyscaleFile = this.greyDir + name + "_grey" + "." + ext;
this.redFile = this.redDir + name + "_red" + "." + ext;
this.blueFile = this.blueDir + name + "_blue" + "." + ext;
this.greenFile = this.greenDir + name + "_green" + "." + ext;
this.asciiFile = this.outDir + name + ".txt";
this.setStats();
}
// An image contains metadata, namely size, width, and height
public void setStats()
{
BufferedImage img;
try
{
Path path = Paths.get(this.inFile);
this.bytes = Files.size(path);
img = ImageIO.read(new File(this.inFile));
this.width = img.getWidth();
this.height = img.getHeight();
} catch (IOException e)
{
}
}
// Console print of data
public void printStats(String msg) {
System.out.println(msg + ": " + this.bytes + " " + this.width + "x" + this.height + " " + this.inFile);
}
// Convert scaled image into buffered image
public static BufferedImage convertToBufferedImage(Image img) {
// Create a buffered image with transparency
BufferedImage bi = new BufferedImage(
img.getWidth(null), img.getHeight(null),
BufferedImage.TYPE_INT_ARGB);
// magic?
Graphics2D graphics2D = bi.createGraphics();
graphics2D.drawImage(img, 0, 0, null);
graphics2D.dispose();
return bi;
}
// Scale or reduce to "scale" percentage provided
public void resize(int scale) {
BufferedImage img = null;
Image resizedImg = null;
int width = (int) (this.width * (scale/100.0) + 0.5);
int height = (int) (this.height * (scale/100.0) + 0.5);
try {
// read an image to BufferedImage for processing
img = ImageIO.read(new File(this.inFile)); // set buffer of image data
// create a new BufferedImage for drawing
resizedImg = img.getScaledInstance(width, height, Image.SCALE_SMOOTH);
} catch (IOException e) {
return;
}
try {
ImageIO.write(convertToBufferedImage(resizedImg), this.ext, new File(resizedFile));
} catch (IOException e) {
return;
}
this.inFile = this.resizedFile; // use scaled file vs original file in Class
this.setStats();
}
public void greyscale() {
BufferedImage img = null;
BufferedImage greyImg = null;
try {
// read an image to BufferedImage for processing
img = ImageIO.read(new File(this.inFile)); // set buffer of image data
greyImg = img;
// create a new BufferedImage for drawing
for (int i = 0; i < img.getHeight(); i++) {
for (int j = 0; j < img.getWidth(); j++) {
Color co = new Color(img.getRGB(j, i));
int red = (int) (co.getRed() * 0.299);
int green = (int) (co.getGreen() * 0.587);
int blue = (int) (co.getBlue() * 0.114);
int total = red + green + blue;
Color newColor = new Color(
total, total, total
);
greyImg.setRGB(j, i, newColor.getRGB());
}
}
} catch (IOException e) {
return;
}
try {
ImageIO.write(convertToBufferedImage(greyImg), this.ext, new File(greyscaleFile));
} catch (IOException e) {
return;
}
this.inFile = this.greyscaleFile; // use scaled file vs original file in Class
this.setStats();
}
public void redscale() {
BufferedImage img = null;
BufferedImage redImg = null;
try {
// read an image to BufferedImage for processing
img = ImageIO.read(new File(this.inFile)); // set buffer of image data
redImg = img;
// create a new BufferedImage for drawing
for (int i = 0; i < img.getHeight(); i++) {
for (int j = 0; j < img.getWidth(); j++) {
Color co = new Color(img.getRGB(j, i));
int red = (int) co.getRed();
int green = 0;
int blue = 0;
Color newColor = new Color(
red,
green,
blue);
redImg.setRGB(j, i, newColor.getRGB());
}
}
} catch (IOException e) {
return;
}
try {
ImageIO.write(convertToBufferedImage(redImg), this.ext, new File(redFile));
} catch (IOException e) {
return;
}
this.inFile = this.redFile; // use scaled file vs original file in Class
this.setStats();
}
public void greenscale() {
BufferedImage img = null;
BufferedImage greenImg = null;
try {
// read an image to BufferedImage for processing
img = ImageIO.read(new File(this.inFile)); // set buffer of image data
greenImg = img;
// create a new BufferedImage for drawing
for (int i = 0; i < img.getHeight(); i++) {
for (int j = 0; j < img.getWidth(); j++) {
Color co = new Color(img.getRGB(j, i));
int red = 0;
int green = (int) co.getGreen();
int blue = 0;
Color newColor = new Color(
red,
green,
blue);
greenImg.setRGB(j, i, newColor.getRGB());
}
}
} catch (IOException e) {
return;
}
try {
ImageIO.write(convertToBufferedImage(greenImg), this.ext, new File(greenFile));
} catch (IOException e) {
return;
}
this.inFile = this.greenFile; // use scaled file vs original file in Class
this.setStats();
}
public void bluescale() {
BufferedImage img = null;
BufferedImage blueImg = null;
try {
// read an image to BufferedImage for processing
img = ImageIO.read(new File(this.inFile)); // set buffer of image data
blueImg = img;
// create a new BufferedImage for drawing
for (int i = 0; i < img.getHeight(); i++) {
for (int j = 0; j < img.getWidth(); j++) {
Color co = new Color(img.getRGB(j, i));
int red = (int) (co.getRed() * 0.299);
int green = (int) (co.getGreen() * 0.587);
int blue = (int) (co.getBlue() * 0.114);
int total = red + green + blue;
Color newColor = new Color(0, 0, total);
blueImg.setRGB(j, i, newColor.getRGB());
}
}
} catch (IOException e) {
return;
}
try {
ImageIO.write(convertToBufferedImage(blueImg), this.ext, new File(blueFile));
} catch (IOException e) {
return;
}
this.inFile = this.blueFile; // use scaled file vs original file in Class
this.setStats();
}
// convert every pixel to an ascii character (ratio does not seem correct)
public void convertToAscii()
{
BufferedImage img = null;
PrintWriter asciiPrt = null;
FileWriter asciiWrt = null;
try
{
File file = new File(this.asciiFile);
Files.deleteIfExists(file.toPath());
} catch (IOException e)
{
System.out.println("Delete File error: " + e);
}
try
{
asciiPrt = new PrintWriter(asciiWrt = new FileWriter(this.asciiFile, true));
} catch (IOException e)
{
System.out.println("ASCII out file create error: " + e);
}
try {
img = ImageIO.read(new File(this.inFile));
} catch (IOException e)
{
}
for (int i = 0; i < img.getHeight(); i++)
{
if (i % 2 != 0)
{
for (int j = 0; j < img.getWidth(); j++)
{
Color col = new Color(img.getRGB(j, i));
double pixVal = (((col.getRed() * 0.30) + (col.getBlue() * 0.59) + (col
.getGreen() * 0.11)));
try {
asciiPrt.print(asciiChar(pixVal));
asciiPrt.print(asciiChar(pixVal));
asciiPrt.flush();
asciiWrt.flush();
} catch (Exception ex)
{
}
}
try
{
asciiPrt.println("");
asciiPrt.flush();
asciiWrt.flush();
} catch (Exception ex)
{
}
}
}
}
// conversion table, there may be better out there ie https://www.billmongan.com/Ursinus-CS173-Fall2020/Labs/ASCIIArt
public String asciiChar(double g) {
String str = " ";
if (g >= 240) {
str = " ";
} else if (g >= 210) {
str = ".";
} else if (g >= 190) {
str = "*";
} else if (g >= 170) {
str = "+";
} else if (g >= 120) {
str = "^";
} else if (g >= 110) {
str = "&";
} else if (g >= 80) {
str = "8";
} else if (g >= 60) {
str = "#";
} else {
str = "@";
}
return str;
}
// tester/driver
public static void main(String[] args) throws IOException {
Pics flowers = new Pics("flowers", "png");
//flowers.greyscale();
//flowers.redscale();
//flowers.greenscale();
//flowers.bluescale();
flowers.printStats("Original");
//flowers.resize(33);
//flowers.printStats("Scaled");
flowers.convertToAscii();
Pics halloween = new Pics("halloween", "png");
//halloween.greyscale();
//halloween.redscale();
//halloween.greenscale();
//halloween.bluescale();
halloween.printStats("Original");
//halloween.resize(33);
//halloween.printStats("Scaled");
halloween.convertToAscii();
}
}
Pics.main(null);
