Example usage for android.graphics Bitmap getPixels

Introduction

In this page you can find the example usage for android.graphics Bitmap getPixels.

Prototype

public void getPixels(@ColorInt int[] pixels, int offset, int stride, int x, int y, int width, int height) 

Source Link

Document

Returns in pixels[] a copy of the data in the bitmap.

Usage

From source file:Main.java

public static Bitmap effectChangeContrast(Bitmap bitmap, double effectLevel) {
    if (bitmap == null) {
        return bitmap;
    }//  ww w .  j  a  va  2s. co  m

    Bitmap dst = bitmap.copy(Bitmap.Config.ARGB_8888, true);

    int height = dst.getHeight();
    int width = dst.getWidth();
    int[] pixels = new int[(width * height)];
    dst.getPixels(pixels, 0, width, 0, 0, width, height);

    for (int YY = 0; YY < width; ++YY) {
        for (int XX = 0; XX < height; ++XX) {
            int bitmapColor = pixels[(YY + XX * width)];
            int[] color = { Color.red(bitmapColor), Color.green(bitmapColor), Color.blue(bitmapColor) };

            if (color[0] > 200 && color[1] > 200 && color[3] > 200) {
                color[0] = 255;
                color[1] = 255;
                color[2] = 255;
            }

            for (int i = 0; i < color.length; i++) {
                int tmpColor = color[i];
                tmpColor = (int) ((tmpColor - 128) * effectLevel + 128);
                if (tmpColor < 0) {
                    tmpColor = 0;
                } else if (tmpColor > 255) {
                    tmpColor = 255;
                }
                color[i] = tmpColor;
            }

            pixels[(YY + XX * width)] = Color.rgb(color[0], color[1], color[2]);
        }
    }

    dst.setPixels(pixels, 0, width, 0, 0, width, height);
    return dst;
}

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From source file:Main.java

static public void setImageColorPixels(ImageView view, Bitmap myBitmap, int rgbcolor)// ,Bitmap sourceBitmap)
{

    int intArray[];

    intArray = new int[myBitmap.getWidth() * myBitmap.getHeight()];

    // copy pixel data from the Bitmap into the 'intArray' array
    myBitmap.getPixels(intArray, 0, myBitmap.getHeight(), 0, 0, myBitmap.getHeight(), myBitmap.getWidth());

    // replace the red pixels with yellow ones
    for (int i = 0; i < intArray.length; i++) {
        // System.out.println("color is--" + i + " " + intArray[i]);
        if (intArray[i] != Color.TRANSPARENT) {

            intArray[i] = rgbcolor;//from w w w  . j  a v  a 2s .  c om
        }
    }
    myBitmap.setPixels(intArray, 0, myBitmap.getHeight(), 0, 0, myBitmap.getHeight(), myBitmap.getWidth());

    view.setImageBitmap(myBitmap);
}

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From source file:Main.java

public static Bitmap binarize(Bitmap bmp) {
    int threshold = Math.round(getOtsuThreshold(bmp));
    int width = bmp.getWidth();
    int height = bmp.getHeight();
    int[] pixels = new int[width * height];
    bmp.getPixels(pixels, 0, width, 0, 0, width, height);

    for (int i = 0; i < width * height; i++) {
        int p = 0;
        if (Color.red(pixels[i]) > threshold)
            p = 255;//from www.  j a v  a 2s.  c o m
        pixels[i] = Color.rgb(p, p, p);
    }

    return Bitmap.createBitmap(pixels, width, height, bmp.getConfig());
}

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From source file:org.odk.collect.android.utilities.QRCodeUtils.java

@NonNull
private static BinaryBitmap getBinaryBitmap(Bitmap bitmap) {
    int[] intArray = new int[bitmap.getWidth() * bitmap.getHeight()];

    //copy pixel data from bitmap into the array
    bitmap.getPixels(intArray, 0, bitmap.getWidth(), 0, 0, bitmap.getWidth(), bitmap.getHeight());

    LuminanceSource source = new RGBLuminanceSource(bitmap.getWidth(), bitmap.getHeight(), intArray);
    return new BinaryBitmap(new HybridBinarizer(source));
}

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From source file:Main.java

public static Bitmap changeColor(Bitmap bitmap, int oldColor, int newColor) {
    if (bitmap == null) {
        return bitmap;
    }//from   w  ww .  j a  va2  s .  com

    int width = bitmap.getWidth();
    int height = bitmap.getHeight();
    int[] pixels = new int[width * height];
    bitmap.getPixels(pixels, 0, width, 0, 0, width, height);
    for (int x = 0; x < pixels.length; ++x) {
        pixels[x] = (pixels[x] == oldColor) ? newColor : pixels[x];
    }
    Bitmap newBitmap = Bitmap.createBitmap(width, height, bitmap.getConfig());
    newBitmap.setPixels(pixels, 0, width, 0, 0, width, height);
    return newBitmap;
}

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From source file:Main.java

/**
 * Returns true if 20% of the image's top right corner is white, or 20% of the bottom of the
 * image is white.//from ww w  .  j  av  a  2  s. c  om
 */
public static boolean isBitmapWhiteAtTopOrBottom(Bitmap largeBitmap) {
    final Bitmap smallBitmap = scaleBitmapDown(largeBitmap);

    final int[] rgbPixels = new int[smallBitmap.getWidth() * smallBitmap.getHeight()];
    smallBitmap.getPixels(rgbPixels, 0, smallBitmap.getWidth(), 0, 0, smallBitmap.getWidth(),
            smallBitmap.getHeight());

    // look at top right corner of the bitmap
    int whiteCount = 0;
    for (int y = 0; y < smallBitmap.getHeight() * HEIGHT_PERCENT_ANALYZED; y++) {
        for (int x = (int) (smallBitmap.getWidth() * (1 - THIRD)); x < smallBitmap.getWidth(); x++) {
            final int rgb = rgbPixels[y * smallBitmap.getWidth() + x];
            if (isWhite(rgb)) {
                whiteCount++;
            }
        }
    }
    int totalPixels = (int) (smallBitmap.getHeight() * smallBitmap.getWidth() * THIRD
            * HEIGHT_PERCENT_ANALYZED);
    if (whiteCount / (float) totalPixels > PROPORTION_WHITE_CUTOFF) {
        return true;
    }

    // look at bottom portion of bitmap
    whiteCount = 0;
    for (int y = (int) (smallBitmap.getHeight() * (1 - HEIGHT_PERCENT_ANALYZED)); y < smallBitmap
            .getHeight(); y++) {
        for (int x = 0; x < smallBitmap.getWidth(); x++) {
            final int rgb = rgbPixels[y * smallBitmap.getWidth() + x];
            if (isWhite(rgb)) {
                whiteCount++;
            }
        }
    }

    totalPixels = (int) (smallBitmap.getHeight() * smallBitmap.getWidth() * HEIGHT_PERCENT_ANALYZED);

    return whiteCount / (float) totalPixels > PROPORTION_WHITE_CUTOFF;
}

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From source file:Main.java

public static Bitmap onlyColors(Bitmap bitmap, int[] colors) {
    if (bitmap == null) {
        return bitmap;
    }//from w  ww  . j av a 2  s . co m
    int width = bitmap.getWidth();
    int height = bitmap.getHeight();
    int[] pixels = new int[width * height];
    bitmap.getPixels(pixels, 0, width, 0, 0, width, height);
    boolean change;
    for (int x = 0; x < pixels.length; ++x) {
        change = true;
        for (int color : colors) {
            if (pixels[x] == color) {
                change = false;
            }
        }
        if (change) {
            pixels[x] = Color.TRANSPARENT;
        }
    }
    Bitmap newBitmap = Bitmap.createBitmap(width, height, bitmap.getConfig());
    newBitmap.setPixels(pixels, 0, width, 0, 0, width, height);
    return newBitmap;
}

---

From source file:Main.java

private static boolean calculateIsDark(Bitmap bitmap) {
    boolean dark = false;

    float darkThreshold = bitmap.getWidth() * (bitmap.getHeight() / 5) * 0.55f;
    int darkPixels = 0;

    int[] pixels = new int[bitmap.getWidth() * (bitmap.getHeight() / 5)];
    bitmap.getPixels(pixels, 0, bitmap.getWidth(), 0, bitmap.getHeight() / 5 * 4, bitmap.getWidth(),
            bitmap.getHeight() / 5);// w  ww .  ja  v  a 2s  .  co  m

    for (int pixel : pixels) {
        int r = Color.red(pixel);
        int g = Color.green(pixel);
        int b = Color.blue(pixel);
        double luminance = (0.299 * r + 0.0f + 0.587 * g + 0.0f + 0.114 * b + 0.0f);
        if (luminance < 150) {
            darkPixels++;
        }
    }

    if (darkPixels >= darkThreshold) {
        dark = true;
    }

    return dark;
}

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From source file:Main.java

/**
 * Returns true if 20% of the image's top right corner is white, or 20% of the bottom
 * of the image is white.//  ww  w  .ja va2 s. c o m
 */
public static boolean isBitmapWhiteAtTopOrBottom(Bitmap largeBitmap) {
    if (Build.VERSION.SDK_INT >= 18) {
        Trace.beginSection("isBitmapWhiteAtTopOrBottom");
    }
    try {
        final Bitmap smallBitmap = scaleBitmapDown(largeBitmap);

        final int[] rgbPixels = new int[smallBitmap.getWidth() * smallBitmap.getHeight()];
        smallBitmap.getPixels(rgbPixels, 0, smallBitmap.getWidth(), 0, 0, smallBitmap.getWidth(),
                smallBitmap.getHeight());

        // look at top right corner of the bitmap
        int whiteCount = 0;
        for (int y = 0; y < smallBitmap.getHeight() * HEIGHT_PERCENT_ANALYZED; y++) {
            for (int x = (int) (smallBitmap.getWidth() * (1 - THIRD)); x < smallBitmap.getWidth(); x++) {
                final int rgb = rgbPixels[y * smallBitmap.getWidth() + x];
                if (isWhite(rgb)) {
                    whiteCount++;
                }
            }
        }
        int totalPixels = (int) (smallBitmap.getHeight() * smallBitmap.getWidth() * THIRD
                * HEIGHT_PERCENT_ANALYZED);
        if (whiteCount / (float) totalPixels > PROPORTION_WHITE_CUTOFF) {
            return true;
        }

        // look at bottom portion of bitmap
        whiteCount = 0;
        for (int y = (int) (smallBitmap.getHeight() * (1 - HEIGHT_PERCENT_ANALYZED)); y < smallBitmap
                .getHeight(); y++) {
            for (int x = 0; x < smallBitmap.getWidth(); x++) {
                final int rgb = rgbPixels[y * smallBitmap.getWidth() + x];
                if (isWhite(rgb)) {
                    whiteCount++;
                }
            }
        }

        totalPixels = (int) (smallBitmap.getHeight() * smallBitmap.getWidth() * HEIGHT_PERCENT_ANALYZED);

        return whiteCount / (float) totalPixels > PROPORTION_WHITE_CUTOFF;
    } finally {
        if (Build.VERSION.SDK_INT >= 18) {
            Trace.endSection();
        }
    }
}

---

From source file:Main.java

/**
 * Returns true if 20% of the image's top right corner is white, or 20% of the bottom
 * of the image is white.//  w w  w . j av  a  2 s  . c om
 */
public static boolean isBitmapWhiteAtTopOrBottom(@NonNull Bitmap largeBitmap) {
    if (Build.VERSION.SDK_INT >= 18) {
        Trace.beginSection("isBitmapWhiteAtTopOrBottom");
    }
    try {
        final Bitmap smallBitmap = scaleBitmapDown(largeBitmap);

        final int[] rgbPixels = new int[smallBitmap.getWidth() * smallBitmap.getHeight()];
        smallBitmap.getPixels(rgbPixels, 0, smallBitmap.getWidth(), 0, 0, smallBitmap.getWidth(),
                smallBitmap.getHeight());

        // look at top right corner of the bitmap
        int whiteCount = 0;
        for (int y = 0; y < smallBitmap.getHeight() * HEIGHT_PERCENT_ANALYZED; y++) {
            for (int x = (int) (smallBitmap.getWidth() * (1 - THIRD)); x < smallBitmap.getWidth(); x++) {
                final int rgb = rgbPixels[y * smallBitmap.getWidth() + x];
                if (isWhite(rgb)) {
                    whiteCount++;
                }
            }
        }
        int totalPixels = (int) (smallBitmap.getHeight() * smallBitmap.getWidth() * THIRD
                * HEIGHT_PERCENT_ANALYZED);
        if (whiteCount / (float) totalPixels > PROPORTION_WHITE_CUTOFF) {
            return true;
        }

        // look at bottom portion of bitmap
        whiteCount = 0;
        for (int y = (int) (smallBitmap.getHeight() * (1 - HEIGHT_PERCENT_ANALYZED)); y < smallBitmap
                .getHeight(); y++) {
            for (int x = 0; x < smallBitmap.getWidth(); x++) {
                final int rgb = rgbPixels[y * smallBitmap.getWidth() + x];
                if (isWhite(rgb)) {
                    whiteCount++;
                }
            }
        }

        totalPixels = (int) (smallBitmap.getHeight() * smallBitmap.getWidth() * HEIGHT_PERCENT_ANALYZED);

        return whiteCount / (float) totalPixels > PROPORTION_WHITE_CUTOFF;
    } finally {
        if (Build.VERSION.SDK_INT >= 18) {
            Trace.endSection();
        }
    }
}

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