Examples with ImageSize digilib.util.ImageSize used on opensource projects

Example 1 with ImageSize

use of digilib.util.ImageSize in project digilib by robcast.

the class ImageJobDescription method getWy.

/**
 * Return the relative y-offset of the image area.
 * Uses wy parameter.
 * Converts wy in pixels to relative.
 *
 * @return
 * @throws IOException
 */
public Float getWy() throws IOException {
    // logger.debug("get_paramWY()");
    if (paramWY == null) {
        paramWY = getAsFloat("wy");
        if (hasOption(DigilibOption.pxarea)) {
            // area in absolute pixels - convert to relative
            ImageSize imgSize = getHiresSize();
            paramWY = paramWY / imgSize.getHeight();
        } else if (hasOption(DigilibOption.sqarea)) {
            // square full size area
            hiresSize = getHiresSize();
            float aspect = hiresSize.getAspect();
            if (aspect < 1) {
                // portrait
                paramWY = (1f - aspect) / 2f;
            } else {
                // landscape
                paramWY = 0f;
            }
        }
    }
    return paramWY;
}

Example 2 with ImageSize

use of digilib.util.ImageSize in project digilib by robcast.

the class ImageJobDescription method isTransformRequired.

/**
 * Returns if any transformation of the source image (image manipulation or
 * format conversion) is required.
 *
 * @return
 * @throws IOException
 */
public boolean isTransformRequired() throws IOException {
    ImageSize is = getInput().getSize();
    ImageSize ess = getMinSourceSize();
    // does the image require processing?
    if (isImageSendable()) {
        // does the image require rescaling?
        if (isLoresOnly() && is.isSmallerThan(ess)) {
            // lores: send even if smaller
            return false;
        } else if (is.fitsIn(ess)) {
            // send if it fits
            return false;
        }
    }
    return true;
}

Example 3 with ImageSize

use of digilib.util.ImageSize in project digilib by robcast.

the class ImageJobDescription method prepareSqueezeToFit.

/**
 * Squeeze to fit: scale factor based on destination size and user area.
 *
 * Uses separate scale factors for x and y to fill destination size changing aspect ratio.
 *
 * Sets ScaleX and ScaleY.
 */
protected Rectangle2D prepareSqueezeToFit() throws IOException {
    /*
         * calculate minimum source size
         * 
         * w_min = dw * 1/ww
         */
    minSourceSize = new ImageSize(Math.round(getAsInt("dw") / getWw()), Math.round(getAsInt("dh") / getWh()));
    /*
         * get image region of interest
         */
    // size of the currently selected input image (uses minSourceSize)
    imgSize = getImgSize();
    // transform from relative [0,1] to image coordinates.
    double areaXf = getWx() * imgSize.getWidth();
    double areaYf = getWy() * imgSize.getHeight();
    double areaWidthF = getWw() * imgSize.getWidth();
    double areaHeightF = getWh() * imgSize.getHeight();
    // round to pixels
    long areaX = Math.round(areaXf);
    long areaY = Math.round(areaYf);
    long areaHeight = Math.round(areaHeightF);
    long areaWidth = Math.round(areaWidthF);
    /*
         * calculate scale factors
         */
    scaleX = getDw() / (double) areaWidth;
    scaleY = getDh() / (double) areaHeight;
    return new Rectangle2D.Double(areaX, areaY, areaWidth, areaHeight);
}

Example 4 with ImageSize

use of digilib.util.ImageSize in project digilib by robcast.

the class ImageJobDescription method prepareScaleToFit.

/**
 * Scale to fit: scale factor based on destination size dw/dh and user area.
 *
 * Uses a uniform scale factor for x and y.
 *
 * Sets ScaleX and ScaleY.
 */
protected Rectangle2D prepareScaleToFit() throws IOException {
    /*
         * prepare minimum source image size
         * 
         * minSourceSize: w_min = dw * 1/ww
         * 
         * Note: dw or dh can be empty (=0) 
         */
    float scale = (1 / Math.min(getWw(), getWh()));
    minSourceSize = new ImageSize(Math.round(getAsInt("dw") * scale), Math.round(getAsInt("dh") * scale));
    /*
         * get image region of interest
         */
    // size of the currently selected input image (uses minSourceSize)
    imgSize = getImgSize();
    // transform from relative [0,1] to image coordinates.
    double areaXf = getWx() * imgSize.getWidth();
    double areaYf = getWy() * imgSize.getHeight();
    double areaWidthF = getWw() * imgSize.getWidth();
    double areaHeightF = getWh() * imgSize.getHeight();
    // round to pixels
    long areaX = Math.round(areaXf);
    long areaY = Math.round(areaYf);
    long areaHeight = Math.round(areaHeightF);
    long areaWidth = Math.round(areaWidthF);
    /*
         * calculate scale factors
         */
    scaleX = getDw() / (double) areaWidth;
    scaleY = getDh() / (double) areaHeight;
    if (scaleX == 0) {
        // dw undefined
        scaleX = scaleY;
    } else if (scaleY == 0) {
        // dh undefined
        scaleY = scaleX;
    } else if (hasOption(DigilibOption.crop)) {
        // use the bigger factor to get fill-the-box
        if (scaleX > scaleY) {
            scaleY = scaleX;
            // crop mode uses whole destination rect
            long croppedAreaHeight = Math.round(getDh() / scaleY);
            if (areaHeight > croppedAreaHeight) {
                // center cropped area
                areaY += (areaHeight - croppedAreaHeight) / 2;
            }
            areaHeight = croppedAreaHeight;
            // re-compute scaleY
            scaleY = getDh() / (double) areaHeight;
        } else {
            scaleX = scaleY;
            // crop mode uses whole destination rect
            long croppedAreaWidth = Math.round(getDw() / scaleX);
            if (areaWidth > croppedAreaWidth) {
                // center cropped area
                areaX += (areaWidth - croppedAreaWidth) / 2;
            }
            areaWidth = croppedAreaWidth;
            // re-compute scaleX
            scaleX = getDw() / (double) areaWidth;
        }
    } else {
        // use the smaller factor to get fit-in-box
        if (scaleX > scaleY) {
            scaleX = scaleY;
            if (hasOption(DigilibOption.fill)) {
                // fill mode uses whole destination rect
                long filledAreaWidth = Math.round(getDw() / scaleX);
                if (filledAreaWidth > areaWidth) {
                    // center filled area
                    areaX -= (filledAreaWidth - areaWidth) / 2;
                }
                areaWidth = filledAreaWidth;
                // re-compute scaleX
                scaleX = getDw() / (double) areaWidth;
            }
        } else {
            scaleY = scaleX;
            if (hasOption(DigilibOption.fill)) {
                // fill mode uses whole destination rect
                long filledAreaHeight = Math.round(getDh() / scaleY);
                if (filledAreaHeight > areaHeight) {
                    // center filled area
                    areaY -= (filledAreaHeight - areaHeight) / 2;
                }
                areaHeight = filledAreaHeight;
                // re-compute scaleY
                scaleY = getDh() / (double) areaHeight;
            }
        }
    }
    return new Rectangle2D.Double(areaX, areaY, areaWidth, areaHeight);
}

Example 5 with ImageSize

use of digilib.util.ImageSize in project digilib by robcast.

the class ImageJobDescription method getOuterImgArea.

/**
 * Return the maximum area of the source image that will be used.
 *
 * This was meant to include extra pixels outside the
 * imgArea when rotating by oblique angles but is not yet implemented.
 * Currently returns imgArea.
 *
 * @return
 * @throws IOException
 * @throws ImageOpException
 */
public Rectangle2D getOuterImgArea() throws IOException, ImageOpException {
    if (outerImgArea == null) {
        // calculate scale parameters
        if (imgArea == null) {
            prepareScaleParams();
        }
        // start with imgArea
        outerImgArea = imgArea;
        // image size in pixels
        ImageSize imgSize = getInput().getSize();
        Rectangle2D imgBounds = new Rectangle2D.Double(0, 0, imgSize.getWidth(), imgSize.getHeight());
        // clip area at the image border
        outerImgArea = outerImgArea.createIntersection(imgBounds);
        // check image parameters sanity
        if ((outerImgArea.getWidth() < 1) || (outerImgArea.getHeight() < 1) || (scaleX * outerImgArea.getWidth() < 2) || (scaleY * outerImgArea.getHeight() < 2)) {
            logger.error("ERROR: invalid scale parameter set!");
            logger.debug("scaleX=" + scaleX + " scaleY=" + scaleY + " outerImgArea=" + outerImgArea);
            throw new ImageOpException("Invalid scale parameter set!");
        }
    }
    return outerImgArea;
}