com.simiacryptus.mindseye.layers.cudnn.ImgModulusPaddingLayer.java Source code

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Here is the source code for com.simiacryptus.mindseye.layers.cudnn.ImgModulusPaddingLayer.java

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/*
 * Copyright (c) 2018 by Andrew Charneski.
 *
 * The author licenses this file to you under the
 * Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance
 * with the License.  You may obtain a copy
 * of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package com.simiacryptus.mindseye.layers.cudnn;

import com.google.gson.JsonObject;
import com.simiacryptus.mindseye.lang.DataSerializer;
import com.simiacryptus.mindseye.lang.LayerBase;
import com.simiacryptus.mindseye.lang.Result;
import com.simiacryptus.mindseye.lang.cudnn.MultiPrecision;
import com.simiacryptus.mindseye.lang.cudnn.Precision;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.annotation.Nonnull;
import javax.annotation.Nullable;
import java.util.Arrays;
import java.util.List;
import java.util.Map;

/**
 * Increases the resolution of the input by selecting a larger centered window. The output png will have the same
 * number of color bands, and the area outside the source png will be setWeights to 0.
 */
@SuppressWarnings("serial")
public class ImgModulusPaddingLayer extends LayerBase implements MultiPrecision<ImgModulusPaddingLayer> {
    private static final Logger log = LoggerFactory.getLogger(ImgModulusPaddingLayer.class);

    private int sizeX;
    private int sizeY;
    private int offsetX;
    private int offsetY;
    private Precision precision = Precision.Double;

    /**
     * Instantiates a new Img eval key.
     */
    private ImgModulusPaddingLayer() {
    }

    /**
     * Instantiates a new Img zero padding key.
     *
     * @param sizeX   the size x
     * @param sizeY   the size y
     * @param offsetX the offset x
     * @param offsetY the offset y
     */
    public ImgModulusPaddingLayer(int sizeX, int sizeY, int offsetX, int offsetY) {
        this.sizeX = sizeX;
        this.sizeY = sizeY;
        this.offsetX = offsetX;
        this.offsetY = offsetY;
    }

    /**
     * Instantiates a new Img modulus padding key.
     *
     * @param sizeX the size x
     * @param sizeY the size y
     */
    public ImgModulusPaddingLayer(int sizeX, int sizeY) {
        this(sizeX, sizeY, 0, 0);
    }

    /**
     * Instantiates a new Img eval key.
     *
     * @param json the json
     * @param rs   the rs
     */
    protected ImgModulusPaddingLayer(@Nonnull final JsonObject json, Map<CharSequence, byte[]> rs) {
        super(json);
        sizeX = json.get("sizeX").getAsInt();
        sizeY = json.get("sizeY").getAsInt();
        offsetX = json.get("offsetX").getAsInt();
        offsetY = json.get("offsetY").getAsInt();
        this.precision = Precision.valueOf(json.getAsJsonPrimitive("precision").getAsString());
    }

    /**
     * From json img eval key.
     *
     * @param json the json
     * @param rs   the rs
     * @return the img eval key
     */
    public static ImgModulusPaddingLayer fromJson(@Nonnull final JsonObject json, Map<CharSequence, byte[]> rs) {
        return new ImgModulusPaddingLayer(json, rs);
    }

    @Nullable
    @Override
    public Result evalAndFree(@Nonnull final Result... inObj) {
        assert inObj.length == 1;
        @Nonnull
        int[] dimensions = inObj[0].getData().getDimensions();
        int inputWidth = dimensions[0];
        int inputHeight = dimensions[1];

        int sizeX = Math.abs(this.sizeX);
        int paddingX = sizeX - ((inputWidth - offsetX) % sizeX);
        while (paddingX < 0)
            paddingX += sizeX;
        while (paddingX >= sizeX)
            paddingX -= sizeX;
        if (this.sizeX < 0 && (paddingX + inputWidth) > sizeX)
            paddingX -= sizeX;

        int sizeY = Math.abs(this.sizeY);
        int paddingY = sizeY - ((inputHeight - offsetY) % sizeY);
        while (paddingY < 0)
            paddingY += sizeY;
        while (paddingY >= sizeY)
            paddingY -= sizeY;
        if (this.sizeY < 0 && (paddingY + inputHeight) > sizeY)
            paddingY -= sizeY;

        int ouputWidth = inputWidth + paddingX;
        int outputHeight = inputHeight + paddingY;
        assert ouputWidth > 0;
        assert outputHeight > 0;
        if (ouputWidth == inputWidth) {
            if (outputHeight == inputHeight) {
                return inObj[0];
            }
        }

        @Nonnull
        ImgCropLayer imgCropLayer = new ImgCropLayer(ouputWidth, outputHeight).setPrecision(precision);
        @Nullable
        Result eval = imgCropLayer.evalAndFree(inObj);
        imgCropLayer.freeRef();
        return eval;
    }

    @Nonnull
    @Override
    public JsonObject getJson(Map<CharSequence, byte[]> resources, DataSerializer dataSerializer) {
        @Nonnull
        final JsonObject json = super.getJsonStub();
        json.addProperty("sizeY", sizeY);
        json.addProperty("sizeX", sizeX);
        json.addProperty("offsetX", offsetX);
        json.addProperty("offsetY", offsetY);
        json.addProperty("precision", precision.name());
        return json;
    }

    @Nonnull
    @Override
    public List<double[]> state() {
        return Arrays.asList();
    }

    @Override
    public Precision getPrecision() {
        return precision;
    }

    @Nonnull
    @Override
    public ImgModulusPaddingLayer setPrecision(final Precision precision) {
        this.precision = precision;
        return this;
    }

    /**
     * Gets offset x.
     *
     * @return the offset x
     */
    public int getOffsetX() {
        return offsetX;
    }

    /**
     * Sets offset x.
     *
     * @param offsetX the offset x
     */
    public void setOffsetX(int offsetX) {
        this.offsetX = offsetX;
    }
}