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Set DPI for captcha providers

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Signed-off-by: Rahul Rudragoudar <rr83019@gmail.com>
This commit is contained in:
Rahul Rudragoudar 2021-08-31 15:43:58 +05:30
parent d30249a89f
commit 26d86bca4c
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GPG Key ID: 0D2CE231A7287EBC
4 changed files with 12 additions and 7 deletions
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5
src/main/java/lc/captchas/FontFunCaptcha.java
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@ -1,6 +1,5 @@
package lc.captchas; package lc.captchas;
import javax.imageio.ImageIO;
import java.awt.*; import java.awt.*;
import java.awt.image.BufferedImage; import java.awt.image.BufferedImage;
import java.io.ByteArrayOutputStream; import java.io.ByteArrayOutputStream;
@ -10,6 +9,7 @@ import java.util.Map;
import java.util.List; import java.util.List;
import lc.captchas.interfaces.Challenge; import lc.captchas.interfaces.Challenge;
import lc.captchas.interfaces.ChallengeProvider; import lc.captchas.interfaces.ChallengeProvider;
import lc.misc.DPISetter;
import lc.misc.HelperFunctions; import lc.misc.HelperFunctions;
public class FontFunCaptcha implements ChallengeProvider { public class FontFunCaptcha implements ChallengeProvider {
@ -74,7 +74,8 @@ public class FontFunCaptcha implements ChallengeProvider {
graphics2D.dispose(); graphics2D.dispose();
ByteArrayOutputStream baos = new ByteArrayOutputStream(); ByteArrayOutputStream baos = new ByteArrayOutputStream();
try { try {
ImageIO.write(img, "png", baos); DPISetter dpi = new DPISetter();
dpi.setDPI(baos, img);
} catch (Exception e) { } catch (Exception e) {
e.printStackTrace(); e.printStackTrace();
} }

5
src/main/java/lc/captchas/ShadowTextCaptcha.java
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@ -1,6 +1,5 @@
package lc.captchas; package lc.captchas;
import javax.imageio.ImageIO;
import java.awt.Graphics2D; import java.awt.Graphics2D;
import java.awt.RenderingHints; import java.awt.RenderingHints;
import java.awt.Color; import java.awt.Color;
@ -14,6 +13,7 @@ import java.util.Map;
import java.util.List; import java.util.List;
import lc.misc.HelperFunctions; import lc.misc.HelperFunctions;
import lc.misc.DPISetter;
import lc.captchas.interfaces.Challenge; import lc.captchas.interfaces.Challenge;
import lc.captchas.interfaces.ChallengeProvider; import lc.captchas.interfaces.ChallengeProvider;
@ -67,7 +67,8 @@ public class ShadowTextCaptcha implements ChallengeProvider {
g2d.dispose(); g2d.dispose();
ByteArrayOutputStream baos = new ByteArrayOutputStream(); ByteArrayOutputStream baos = new ByteArrayOutputStream();
try { try {
ImageIO.write(img2, "png", baos); DPISetter dpi = new DPISetter();
dpi.setDPI(baos, img2);
} catch (Exception e) { } catch (Exception e) {
e.printStackTrace(); e.printStackTrace();
} }

5
src/main/scala/lc/captchas/DebugCaptcha.scala
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@ -1,6 +1,5 @@
package lc.captchas package lc.captchas
import javax.imageio.ImageIO
import java.awt.Color import java.awt.Color
import java.awt.Font import java.awt.Font
import java.awt.font.TextLayout import java.awt.font.TextLayout
@ -12,6 +11,7 @@ import java.util.List
import lc.misc.HelperFunctions import lc.misc.HelperFunctions
import lc.captchas.interfaces.Challenge import lc.captchas.interfaces.Challenge
import lc.captchas.interfaces.ChallengeProvider import lc.captchas.interfaces.ChallengeProvider
import lc.misc.DPISetter
/** This captcha is only for debugging purposes. It creates very simple captchas that are deliberately easy to solve with OCR engines */ /** This captcha is only for debugging purposes. It creates very simple captchas that are deliberately easy to solve with OCR engines */
class DebugCaptcha extends ChallengeProvider { class DebugCaptcha extends ChallengeProvider {
@ -53,7 +53,8 @@ class DebugCaptcha extends ChallengeProvider {
graphics2D.dispose() graphics2D.dispose()
val baos = new ByteArrayOutputStream() val baos = new ByteArrayOutputStream()
try { try {
ImageIO.write(img, "png", baos) val dpi = new DPISetter();
dpi.setDPI(baos, img);
} catch { } catch {
case e: Exception => case e: Exception =>
e.printStackTrace() e.printStackTrace()

4
src/main/scala/lc/captchas/LabelCaptcha.scala
View File

@ -10,6 +10,7 @@ import java.awt.Color
import lc.captchas.interfaces.ChallengeProvider import lc.captchas.interfaces.ChallengeProvider
import lc.captchas.interfaces.Challenge import lc.captchas.interfaces.Challenge
import java.util.{List => JavaList, Map => JavaMap} import java.util.{List => JavaList, Map => JavaMap}
import lc.misc.DPISetter
class LabelCaptcha extends ChallengeProvider { class LabelCaptcha extends ChallengeProvider {
private var knownFiles = new File("known").list.toList private var knownFiles = new File("known").list.toList
@ -49,7 +50,8 @@ class LabelCaptcha extends ChallengeProvider {
val token = encrypt(knownImageFile + "," + unknownImageFile) val token = encrypt(knownImageFile + "," + unknownImageFile)
val baos = new ByteArrayOutputStream() val baos = new ByteArrayOutputStream()
ImageIO.write(mergedImage, "png", baos) val dpi = new DPISetter();
dpi.setDPI(baos, mergedImage);
new Challenge(baos.toByteArray(), "image/png", token) new Challenge(baos.toByteArray(), "image/png", token)
} }