Example Image Convert - Revision history

Peter at 23:01, 17 January 2022

2022-01-17T23:01:42Z

← Older revision		Revision as of 23:01, 17 January 2022
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	Example Code:		Example Code:
	* [https://github.com/lessthanoptimal/BoofCV/blob/v0.38/examples/src/main/java/boofcv/examples/imageprocessing/ExampleImageConvert.java ExampleImageConvert.java]		* [https://github.com/lessthanoptimal/BoofCV/blob/v0.40/examples/src/main/java/boofcv/examples/imageprocessing/ExampleImageConvert.java ExampleImageConvert.java]

	Concepts:		Concepts:
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	*/		*/
	public class ExampleImageConvert {		public class ExampleImageConvert {

	// image loaded from a file		// image loaded from a file
	BufferedImage image;		BufferedImage image;
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	// Going from an unsigned 8-bit image to unsigned 16-bit image is no problem		// Going from an unsigned 8-bit image to unsigned 16-bit image is no problem
	~~GrayU16~~ imageU16 = new GrayU16(gray.width, gray.height);		var imageU16 = new GrayU16(gray.width, gray.height);
	ConvertImage.convert(gray, imageU16);		ConvertImage.convert(gray, imageU16);

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	// Here is an example where you over flow the image after converting		// Here is an example where you over flow the image after converting
	// There won't be an exception or any error messages but the output image will be corrupted		// There won't be an exception or any error messages but the output image will be corrupted
	~~GrayU8~~ imageBad = new GrayU8(derivX.width, derivX.height);		var imageBad = new GrayU8(derivX.width, derivX.height);
	ConvertImage.convert(derivX, imageBad);		ConvertImage.convert(derivX, imageBad);

	// One way to get around this problem rescale and adjust the pixel values so that they		// One way to get around this problem rescale and adjust the pixel values so that they
	// will be within a valid range.		// will be within a valid range.
	~~GrayS16~~ scaledAbs = new GrayS16(derivX.width, derivX.height);		var scaledAbs = new GrayS16(derivX.width, derivX.height);
	GPixelMath.abs(derivX, scaledAbs);		GPixelMath.abs(derivX, scaledAbs);
	GPixelMath.multiply(scaledAbs, 255.0/ImageStatistics.max(scaledAbs), scaledAbs);		GPixelMath.multiply(scaledAbs, 255.0/ImageStatistics.max(scaledAbs), scaledAbs);
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	// ConvertBufferedImage is similar to ImageConvert in that it does a direct coversion with out		// ConvertBufferedImage is similar to ImageConvert in that it does a direct coversion with out
	// adjusting the pixel's value		// adjusting the pixel's value
	~~BufferedImage~~ outBad = new BufferedImage(imageBad.width, imageBad.height, BufferedImage.TYPE_INT_RGB);		var outBad = new BufferedImage(imageBad.width, imageBad.height, BufferedImage.TYPE_INT_RGB);
	~~BufferedImage~~ outScaled = new BufferedImage(imageBad.width, imageBad.height, BufferedImage.TYPE_INT_RGB);		var outScaled = new BufferedImage(imageBad.width, imageBad.height, BufferedImage.TYPE_INT_RGB);

	~~ListDisplayPanel~~ panel = new ListDisplayPanel();		var panel = new ListDisplayPanel();
	panel.addImage(ConvertBufferedImage.convertTo(scaledAbs, outScaled), "Scaled");		panel.addImage(ConvertBufferedImage.convertTo(scaledAbs, outScaled), "Scaled");
	panel.addImage(colorX, "Visualized");		panel.addImage(colorX, "Visualized");
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	*/		*/
	public void createImages() {		public void createImages() {
	image = UtilImageIO.~~loadImage~~(UtilIO.pathExample("standard/barbara.jpg"));		image = UtilImageIO.loadImageNotNull(UtilIO.pathExample("standard/barbara.jpg"));

	gray = ConvertBufferedImage.convertFromSingle(image, null, GrayU8.class);		gray = ConvertBufferedImage.convertFromSingle(image, null, GrayU8.class);
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	public static void main( String[] args ) {		public static void main( String[] args ) {
	~~ExampleImageConvert~~ app = new ExampleImageConvert();		var app = new ExampleImageConvert();
	app.createImages();		app.createImages();
	app.convert();		app.convert();

Peter at 18:56, 12 July 2021

2021-07-12T18:56:47Z

← Older revision		Revision as of 18:56, 12 July 2021
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	Example Code:		Example Code:
	* [https://github.com/lessthanoptimal/BoofCV/blob/v0.37/examples/src/main/java/boofcv/examples/imageprocessing/ExampleImageConvert.java ExampleImageConvert.java]		* [https://github.com/lessthanoptimal/BoofCV/blob/v0.38/examples/src/main/java/boofcv/examples/imageprocessing/ExampleImageConvert.java ExampleImageConvert.java]

	Concepts:		Concepts:
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	// gray scale image with element values from 0 to 255		// gray scale image with element values from 0 to 255
	GrayU8 gray;		GrayU8 gray;
	// Derivative of gray image. Elements are 16-bit signed integers		// Derivative of gray image. Elements are 16-bit signed integers
	GrayS16 derivX, derivY;		GrayS16 derivX, derivY;

	void convert() {		void convert() {
	// Converting between BoofCV image types is easy with ConvertImage. ConvertImage copies		// Converting between BoofCV image types is easy with ConvertImage. ConvertImage copies
	// the value of a pixel in one image into another image. When doing so you need to take		// the value of a pixel in one image into another image. When doing so you need to take
	// in account the storage capabilities of these different class types.		// in account the storage capabilities of these different class types.

Peter at 02:18, 22 December 2020

2020-12-22T02:18:17Z

← Older revision		Revision as of 02:18, 22 December 2020
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	Example Code:		Example Code:
	* [https://github.com/lessthanoptimal/BoofCV/blob/v0.33/examples/src/main/java/boofcv/examples/imageprocessing/ExampleImageConvert.java ExampleImageConvert.java]		* [https://github.com/lessthanoptimal/BoofCV/blob/v0.37/examples/src/main/java/boofcv/examples/imageprocessing/ExampleImageConvert.java ExampleImageConvert.java]

	Concepts:		Concepts:
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	GrayU8 gray;		GrayU8 gray;
	// Derivative of gray image. Elements are 16-bit signed integers		// Derivative of gray image. Elements are 16-bit signed integers
	GrayS16 derivX,derivY;		GrayS16 derivX, derivY;

	void convert() {		void convert() {
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	// Going from an unsigned 8-bit image to unsigned 16-bit image is no problem		// Going from an unsigned 8-bit image to unsigned 16-bit image is no problem
	GrayU16 imageU16 = new GrayU16(gray.width,gray.height);		GrayU16 imageU16 = new GrayU16(gray.width, gray.height);
	ConvertImage.convert(gray,imageU16);		ConvertImage.convert(gray, imageU16);

	// You can convert back into the 8-bit image from the 16-bit image with no problem		// You can convert back into the 8-bit image from the 16-bit image with no problem
	// in this situation because imageU16 does not use the full range of 16-bit values		// in this situation because imageU16 does not use the full range of 16-bit values
	ConvertImage.convert(imageU16,gray);		ConvertImage.convert(imageU16, gray);

	// Here is an example where you over flow the image after converting		// Here is an example where you over flow the image after converting
	// There won't be an exception or any error messages but the output image will be corrupted		// There won't be an exception or any error messages but the output image will be corrupted
	GrayU8 imageBad = new GrayU8(derivX.width,derivX.height);		GrayU8 imageBad = new GrayU8(derivX.width, derivX.height);
	ConvertImage.convert(derivX,imageBad);		ConvertImage.convert(derivX, imageBad);

	// One way to get around this problem rescale and adjust the pixel values so that they		// One way to get around this problem rescale and adjust the pixel values so that they
	// will be within a valid range.		// will be within a valid range.
	GrayS16 scaledAbs = new GrayS16(derivX.width,derivX.height);		GrayS16 scaledAbs = new GrayS16(derivX.width, derivX.height);
	GPixelMath.abs(derivX,scaledAbs);		GPixelMath.abs(derivX, scaledAbs);
	GPixelMath.multiply(scaledAbs, 255.0 / ImageStatistics.max(scaledAbs), scaledAbs);		GPixelMath.multiply(scaledAbs, 255.0/ImageStatistics.max(scaledAbs), scaledAbs);

	// If you just want to see the values of a 16-bit image there are built in utility functions		// If you just want to see the values of a 16-bit image there are built in utility functions
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	// ConvertBufferedImage is similar to ImageConvert in that it does a direct coversion with out		// ConvertBufferedImage is similar to ImageConvert in that it does a direct coversion with out
	// adjusting the pixel's value		// adjusting the pixel's value
	BufferedImage outBad = new BufferedImage(imageBad.width,imageBad.height,BufferedImage.TYPE_INT_RGB);		BufferedImage outBad = new BufferedImage(imageBad.width, imageBad.height, BufferedImage.TYPE_INT_RGB);
	BufferedImage outScaled = new BufferedImage(imageBad.width,imageBad.height,BufferedImage.TYPE_INT_RGB);		BufferedImage outScaled = new BufferedImage(imageBad.width, imageBad.height, BufferedImage.TYPE_INT_RGB);

	ListDisplayPanel panel = new ListDisplayPanel();		ListDisplayPanel panel = new ListDisplayPanel();
	panel.addImage(ConvertBufferedImage.convertTo(scaledAbs,outScaled),"Scaled");		panel.addImage(ConvertBufferedImage.convertTo(scaledAbs, outScaled), "Scaled");
	panel.addImage(colorX,"Visualized");		panel.addImage(colorX, "Visualized");
	panel.addImage(ConvertBufferedImage.convertTo(imageBad,outBad),"Bad");		panel.addImage(ConvertBufferedImage.convertTo(imageBad, outBad), "Bad");
	ShowImages.showWindow(panel,"Image Convert",true);		ShowImages.showWindow(panel, "Image Convert", true);
	}		}

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	}		}

	public static void main( String ~~args~~[] ) {		public static void main( String[] args ) {
	ExampleImageConvert app = new ExampleImageConvert();		ExampleImageConvert app = new ExampleImageConvert();

	app.createImages();		app.createImages();
	app.convert();		app.convert();

Peter at 14:26, 15 March 2019

2019-03-15T14:26:55Z

← Older revision		Revision as of 14:26, 15 March 2019
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	Example Code:		Example Code:
	* [https://github.com/lessthanoptimal/BoofCV/blob/v0.23/examples/src/boofcv/examples/imageprocessing/ExampleImageConvert.java ExampleImageConvert.java]		* [https://github.com/lessthanoptimal/BoofCV/blob/v0.33/examples/src/main/java/boofcv/examples/imageprocessing/ExampleImageConvert.java ExampleImageConvert.java]

	Concepts:		Concepts:

Peter at 04:46, 28 March 2016

2016-03-28T04:46:33Z

← Older revision		Revision as of 04:46, 28 March 2016
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	Example Code:		Example Code:
	* [https://github.com/lessthanoptimal/BoofCV/blob/v0.20/examples/src/boofcv/examples/imageprocessing/ExampleImageConvert.java ExampleImageConvert.java]		* [https://github.com/lessthanoptimal/BoofCV/blob/v0.23/examples/src/boofcv/examples/imageprocessing/ExampleImageConvert.java ExampleImageConvert.java]

	Concepts:		Concepts:
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	BufferedImage image;		BufferedImage image;
	// gray scale image with element values from 0 to 255		// gray scale image with element values from 0 to 255
	~~ImageUInt8~~ gray;		GrayU8 gray;
	// Derivative of gray image. Elements are 16-bit signed integers		// Derivative of gray image. Elements are 16-bit signed integers
	~~ImageSInt16~~ derivX,derivY;		GrayS16 derivX,derivY;

	void convert() {		void convert() {
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	// Going from an unsigned 8-bit image to unsigned 16-bit image is no problem		// Going from an unsigned 8-bit image to unsigned 16-bit image is no problem
	~~ImageUInt16~~ imageU16 = new ~~ImageUInt16~~(gray.width,gray.height);		GrayU16 imageU16 = new GrayU16(gray.width,gray.height);
	ConvertImage.convert(gray,imageU16);		ConvertImage.convert(gray,imageU16);

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	// Here is an example where you over flow the image after converting		// Here is an example where you over flow the image after converting
	// There won't be an exception or any error messages but the output image will be corrupted		// There won't be an exception or any error messages but the output image will be corrupted
	~~ImageUInt8~~ imageBad = new ~~ImageUInt8~~(derivX.width,derivX.height);		GrayU8 imageBad = new GrayU8(derivX.width,derivX.height);
	ConvertImage.convert(derivX,imageBad);		ConvertImage.convert(derivX,imageBad);

	// One way to get around this problem rescale and adjust the pixel values so that they		// One way to get around this problem rescale and adjust the pixel values so that they
	// will be within a valid range.		// will be within a valid range.
	~~ImageSInt16~~ scaledAbs = new ~~ImageSInt16~~(derivX.width,derivX.height);		GrayS16 scaledAbs = new GrayS16(derivX.width,derivX.height);
	GPixelMath.abs(derivX,scaledAbs);		GPixelMath.abs(derivX,scaledAbs);
	GPixelMath.multiply(scaledAbs, 255.0 / ImageStatistics.max(scaledAbs), scaledAbs);		GPixelMath.multiply(scaledAbs, 255.0 / ImageStatistics.max(scaledAbs), scaledAbs);
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	BufferedImage outBad = new BufferedImage(imageBad.width,imageBad.height,BufferedImage.TYPE_INT_RGB);		BufferedImage outBad = new BufferedImage(imageBad.width,imageBad.height,BufferedImage.TYPE_INT_RGB);
	BufferedImage outScaled = new BufferedImage(imageBad.width,imageBad.height,BufferedImage.TYPE_INT_RGB);		BufferedImage outScaled = new BufferedImage(imageBad.width,imageBad.height,BufferedImage.TYPE_INT_RGB);
	~~ShowImages~~.~~showWindow~~(ConvertBufferedImage.convertTo(~~imageBad~~,~~outBad~~),"~~Bad Conversion~~");
	~~ShowImages~~.~~showWindow~~(ConvertBufferedImage.convertTo(~~scaledAbs~~,~~outScaled~~),"~~Scaled~~");		ListDisplayPanel panel = new ListDisplayPanel();
	ShowImages.showWindow(~~colorX~~,"~~Visualized~~");		panel.addImage(ConvertBufferedImage.convertTo(scaledAbs,outScaled),"Scaled");
			panel.addImage(colorX,"Visualized");
			panel.addImage(ConvertBufferedImage.convertTo(imageBad,outBad),"Bad");
			ShowImages.showWindow(panel,"Image Convert",true);
	}		}

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	image = UtilImageIO.loadImage(UtilIO.pathExample("standard/barbara.jpg"));		image = UtilImageIO.loadImage(UtilIO.pathExample("standard/barbara.jpg"));

	gray = ConvertBufferedImage.convertFromSingle(image, null, ~~ImageUInt8~~.class);		gray = ConvertBufferedImage.convertFromSingle(image, null, GrayU8.class);
	derivX = GeneralizedImageOps.createSingleBand(~~ImageSInt16~~.class, gray.getWidth(), gray.getHeight());		derivX = GeneralizedImageOps.createSingleBand(GrayS16.class, gray.getWidth(), gray.getHeight());
	derivY = GeneralizedImageOps.createSingleBand(~~ImageSInt16~~.class, gray.getWidth(), gray.getHeight());		derivY = GeneralizedImageOps.createSingleBand(GrayS16.class, gray.getWidth(), gray.getHeight());

	GImageDerivativeOps.gradient(DerivativeType.SOBEL, gray, derivX, derivY, BorderType.EXTENDED);		GImageDerivativeOps.gradient(DerivativeType.SOBEL, gray, derivX, derivY, BorderType.EXTENDED);

Peter at 15:15, 9 November 2015

2015-11-09T15:15:34Z

← Older revision		Revision as of 15:15, 9 November 2015
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	Example Code:		Example Code:
	* [https://github.com/lessthanoptimal/BoofCV/blob/v0.19/examples/src/boofcv/examples/imageprocessing/ExampleImageConvert.java ExampleImageConvert.java]		* [https://github.com/lessthanoptimal/BoofCV/blob/v0.20/examples/src/boofcv/examples/imageprocessing/ExampleImageConvert.java ExampleImageConvert.java]

	Concepts:		Concepts:
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	*/		*/
	public void createImages() {		public void createImages() {
	image = UtilImageIO.loadImage("~~../data/evaluation/~~standard/barbara.~~png~~");		image = UtilImageIO.loadImage(UtilIO.pathExample("standard/barbara.jpg"));

	gray = ConvertBufferedImage.convertFromSingle(image, null, ImageUInt8.class);		gray = ConvertBufferedImage.convertFromSingle(image, null, ImageUInt8.class);

Peter at 19:36, 19 September 2015

2015-09-19T19:36:55Z

← Older revision		Revision as of 19:36, 19 September 2015
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	Example Code:		Example Code:
	* [https://github.com/lessthanoptimal/BoofCV/blob/v0.16/examples/src/boofcv/examples/imageprocessing/ExampleImageConvert.java ExampleImageConvert.java]		* [https://github.com/lessthanoptimal/BoofCV/blob/v0.19/examples/src/boofcv/examples/imageprocessing/ExampleImageConvert.java ExampleImageConvert.java]

	Concepts:		Concepts:
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	derivY = GeneralizedImageOps.createSingleBand(ImageSInt16.class, gray.getWidth(), gray.getHeight());		derivY = GeneralizedImageOps.createSingleBand(ImageSInt16.class, gray.getWidth(), gray.getHeight());

	GImageDerivativeOps.~~sobel~~(gray,derivX,derivY, BorderType.EXTENDED);		GImageDerivativeOps.gradient(DerivativeType.SOBEL, gray, derivX, derivY, BorderType.EXTENDED);
	}		}

Peter: Updated for v0.16

2013-12-25T19:26:10Z

Updated for v0.16

← Older revision		Revision as of 19:26, 25 December 2013
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	Example Code:		Example Code:
	* [https://github.com/lessthanoptimal/BoofCV/blob/v0.15/examples/src/boofcv/examples/ExampleImageConvert.java ExampleImageConvert.java]		* [https://github.com/lessthanoptimal/BoofCV/blob/v0.16/examples/src/boofcv/examples/imageprocessing/ExampleImageConvert.java ExampleImageConvert.java]

	Concepts:		Concepts:

Peter at 22:58, 20 June 2013

2013-06-20T22:58:24Z

← Older revision		Revision as of 22:58, 20 June 2013
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	Example Code:		Example Code:
	* [https://github.com/lessthanoptimal/BoofCV/blob/v0.12/examples/src/boofcv/examples/ExampleImageConvert.java ExampleImageConvert.java]		* [https://github.com/lessthanoptimal/BoofCV/blob/v0.15/examples/src/boofcv/examples/ExampleImageConvert.java ExampleImageConvert.java]

	Concepts:		Concepts:
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	// ConvertBufferedImage is similar to ImageConvert in that it does a direct coversion with out		// ConvertBufferedImage is similar to ImageConvert in that it does a direct coversion with out
	// adjusting the pixel's value		// adjusting the pixel's value
	ShowImages.showWindow(ConvertBufferedImage.convertTo(imageBad,~~null~~),"Bad Conversion");		BufferedImage outBad = new BufferedImage(imageBad.width,imageBad.height,BufferedImage.TYPE_INT_RGB);
	ShowImages.showWindow(ConvertBufferedImage.convertTo(scaledAbs,~~null~~),"Scaled");		BufferedImage outScaled = new BufferedImage(imageBad.width,imageBad.height,BufferedImage.TYPE_INT_RGB);
			ShowImages.showWindow(ConvertBufferedImage.convertTo(imageBad,outBad),"Bad Conversion");
			ShowImages.showWindow(ConvertBufferedImage.convertTo(scaledAbs,outScaled),"Scaled");
	ShowImages.showWindow(colorX,"Visualized");		ShowImages.showWindow(colorX,"Visualized");
	}		}

Peter at 02:12, 6 December 2012

2012-12-06T02:12:02Z

← Older revision		Revision as of 02:12, 6 December 2012
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	~~= Converting Image Types =~~

	<center>		<center>
	<gallery widths=200px heights=200px>		<gallery widths=200px heights=200px>