Package io.github.jspinak.brobot.util.image

Class PatternScaler

java.lang.Object

io.github.jspinak.brobot.util.image.PatternScaler

public class PatternScaler
extends Object

Utility for scaling pattern images to handle DPI and resolution differences.

This utility is particularly useful for:

• Handling DPI scaling differences between development and production environments
• Pre-scaling patterns for better performance compared to runtime scaling
• Creating pattern variants for different screen resolutions
• Testing pattern matching at different scales

The scaler preserves image quality using bilinear interpolation and anti-aliasing, ensuring that scaled patterns maintain their matching characteristics.

Since:

1.0

Constructor Summary

Constructors

Constructor	Description
PatternScaler()

Method Summary

Modifier and Type	Method	Description
static BufferedImage	scaleImage(BufferedImage image, float scaleFactor)	Scales a BufferedImage by the given factor.
static void	scalePatterns(String sourceDir, float scaleFactor, String suffix)	Scales all PNG patterns in a directory and saves them with a suffix.
static void	scalePatterns(String sourceDir, String targetDir, float scaleFactor, String suffix)	Scales all PNG patterns in a directory and saves them in a target directory.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

PatternScaler

public PatternScaler()

Method Details

scalePatterns

public static void scalePatterns(String sourceDir,
 float scaleFactor,
 String suffix)

Scales all PNG patterns in a directory and saves them with a suffix.

Parameters:

sourceDir - The directory containing pattern images

scaleFactor - The scale factor (e.g., 0.8 for 80%, 1.25 for 125%)

suffix - The suffix to append to scaled files (e.g., "-80", "-125")

scalePatterns

public static void scalePatterns(String sourceDir,
 String targetDir,
 float scaleFactor,
 String suffix)

Scales all PNG patterns in a directory and saves them in a target directory.

Parameters:

sourceDir - The directory containing pattern images

targetDir - The directory to save scaled images

scaleFactor - The scale factor (e.g., 0.8 for 80%, 1.25 for 125%)

suffix - Optional suffix to append to scaled files (can be null)

scaleImage

public static BufferedImage scaleImage(BufferedImage image,
 float scaleFactor)

Scales a BufferedImage by the given factor.

Parameters:

image - The image to scale

scaleFactor - The scale factor

Returns:

The scaled image