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invert cropped frame and scan for inverted qrs

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This commit is contained in:
Craig Raw 2023-05-25 12:29:43 +02:00
parent b52be27a99
commit 5d99eee89a
1 changed files with 31 additions and 0 deletions
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31
src/main/java/com/sparrowwallet/sparrow/control/WebcamService.java
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@ -14,16 +14,21 @@ import javafx.concurrent.ScheduledService;
import javafx.concurrent.Task;
import javafx.embed.swing.SwingFXUtils;
import javafx.scene.image.Image;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.awt.*;
import java.awt.geom.RoundRectangle2D;
import java.awt.image.BufferedImage;
import java.awt.image.WritableRaster;
import java.util.Arrays;
import java.util.List;
import java.util.Map;
import java.util.concurrent.TimeUnit;
public class WebcamService extends ScheduledService<Image> {
private static final Logger log = LoggerFactory.getLogger(WebcamService.class);
private WebcamResolution resolution;
private WebcamDevice device;
private final WebcamListener listener;
@ -137,6 +142,9 @@ public class WebcamService extends ScheduledService<Image> {
if(result == null) {
result = readQR(croppedImage);
}
if(result == null) {
result = readQR(invert(croppedImage));
}
if(result != null) {
resultProperty.set(result);
@ -175,6 +183,29 @@ public class WebcamService extends ScheduledService<Image> {
return new CroppedDimension(x, y, squareSize);
}
public BufferedImage invert(BufferedImage inImg) {
try {
int width = inImg.getWidth();
int height = inImg.getHeight();
BufferedImage outImg = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
WritableRaster outRaster = outImg.getRaster();
WritableRaster inRaster = inImg.getRaster();
for(int y = 0; y < height; y++) {
for(int x = 0; x < width; x++) {
for(int i = 0; i < outRaster.getNumBands(); i++) {
outRaster.setSample(x, y, i, 255 - inRaster.getSample(x, y, i));
}
}
}
return outImg;
} catch(Exception e) {
log.warn("Error inverting image", e);
return inImg;
}
}
public Result getResult() {
return resultProperty.get();
}