Package deepnetts.util

Class ImageSetUtils

java.lang.Object

deepnetts.util.ImageSetUtils

public class ImageSetUtils
extends Object

Field Summary

Fields

Modifier and Type	Field	Description
static final String	IMAGE_IDX_FILE
static final String	LABELS_FILE
static final String	TEST_FILE
static final String	TRAIN_FILE

Constructor Summary

Constructors

Constructor	Description
ImageSetUtils()

Method Summary

Modifier and Type	Method	Description
static void	balanceDownsample(ImageSet imageSet, Map<String,Integer> clazzStats)
static void	balanceUpsample(ImageSet imageSet, Map<String,Integer> clazzStats)	Balance specified data set by adding random images of each class, to get equal number of examples for each class.
static ImageSet	createDataSetFromRawImages(String sourcePath, String targetPath, int targetWidth, int targetHeight, boolean useAbsolutePaths)	Creates image data set from raw images by resizing and randomly croping to target dimensions.
static File	createImageIndex(String path)	Creates an index file with list of all files in all subdirectories and write them into single index.txt file.
static void	createLabelsIndex(String path)	Creates a file with list of labels/categories from subdirectories at the specified given path.
static void	createRandomlyCroppedImages(String srcPath, String destPath, int targetWidth, int targetHeight, int num)
static File	createSubSampledImageIndex(String srcDir, String targetFileName, int samplesPerClass, boolean useFullPath)	Copies specified number of samples of each class from
static List<String>	labelsFromSubDirectories(String path)	Returns a list of category/class labels from the names of subdirectories for the given path.
static void	renameFilesAsClasses(String srcPath, String className)	Renames files in specified directory.
static void	writeToFile(List<String> list, String fileName)	Writes a given list of strings to file.

Methods inherited from class java.lang.Object

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

Field Details

LABELS_FILE

public static final String LABELS_FILE

See Also:

• Constant Field Values

TRAIN_FILE

public static final String TRAIN_FILE

See Also:

• Constant Field Values

TEST_FILE

public static final String TEST_FILE

See Also:

• Constant Field Values

IMAGE_IDX_FILE

public static final String IMAGE_IDX_FILE

See Also:

• Constant Field Values

Constructor Details

ImageSetUtils

public ImageSetUtils()

Method Details

createDataSetFromRawImages

public static ImageSet createDataSetFromRawImages(String sourcePath,
 String targetPath,
 int targetWidth,
 int targetHeight,
 boolean useAbsolutePaths)
                                           throws IOException

Creates image data set from raw images by resizing and randomly croping to target dimensions. Scale image by smaller dimension to target width/height Crop image on center to fit target dimensions Save all images to target path This how its done for AlexNet/ImageNet competition

Parameters:

sourcePath -

targetPath -

targetWidth -

targetHeight -

useAbsolutePaths -

Returns:

Throws:

IOException

createRandomlyCroppedImages

public static void createRandomlyCroppedImages(String srcPath,
 String destPath,
 int targetWidth,
 int targetHeight,
 int num)
                                        throws IOException

Throws:

IOException

labelsFromSubDirectories

public static List<String> labelsFromSubDirectories(String path)

Returns a list of category/class labels from the names of subdirectories for the given path. Use this method to generate labels for example images. Expected directory structure is to have one subdirecotry for each category/class.

Parameters:

path - path to search for subirectories

Returns:

list of class labels

writeToFile

public static void writeToFile(List<String> list,
 String fileName)
                        throws IOException

Writes a given list of strings to file.

Parameters:

list - a list of strings to write to file

fileName - name of the file to write to

Throws:

IOException

createLabelsIndex

public static void createLabelsIndex(String path)
                              throws IOException

Creates a file with list of labels/categories from subdirectories at the specified given path. Labels in file are sorted by name. Names of subdirectories correspond to category/class labels. File is also created at specified path.

Parameters:

path - path to directory which contains image categories/classes

Throws:

IOException

createImageIndex

public static File createImageIndex(String path)
                             throws IOException

Creates an index file with list of all files in all subdirectories and write them into single index.txt file. File index.txt is created in specifed path. Expected structure of the directory at given path is path/imageCategoryName/imageFile1.jpg each category of images should have its own directory which is named as corresponding category Sta se desava ako index.txt vec postoji? Da upozorava? Ovaj bi mogao da kreira i indeks labela u jednom cugu Tako korisnik samo napravi direktorijum sa slikama Ovo bi se moglo i automatski pozivati iz image set-a ako nepostoje... ImageSet(Path)

Parameters:

path - directory path to index

Returns:

created image index file

Throws:

IOException

balanceUpsample

public static void balanceUpsample(ImageSet imageSet,
 Map<String,Integer> clazzStats)

Balance specified data set by adding random images of each class, to get equal number of examples for each class.

Parameters:

imageSet - imageSet to balance

clazzStats - number of each class

balanceDownsample

public static void balanceDownsample(ImageSet imageSet,
 Map<String,Integer> clazzStats)

renameFilesAsClasses

public static void renameFilesAsClasses(String srcPath,
 String className)
                                 throws FileNotFoundException

Renames files in specified directory. New file names correspond to numerated image category/class label. className_0001.jpg, className_002.jpg, ...

Parameters:

srcPath -

className -

Throws:

FileNotFoundException

createSubSampledImageIndex

public static File createSubSampledImageIndex(String srcDir,
 String targetFileName,
 int samplesPerClass,
 boolean useFullPath)
                                       throws IOException

Copies specified number of samples of each class from

Parameters:

srcDir -

targetFileName -

samplesPerClass -

useFullPath -

Returns:

Throws:

IOException