A java (8) script that converts any image java can load into a Open Office Spreadsheet file. (you'll need the libs mentioned here: http://incubator.apache.org/odftoolkit/simple/gettingstartguide.html)

Image2Spreadsheet.java

import java.awt.image.BufferedImage;
import java.io.File;
import java.util.Iterator;
import java.util.stream.IntStream;

import javax.imageio.ImageIO;

import org.odftoolkit.odfdom.type.Color;
import org.odftoolkit.simple.SpreadsheetDocument;
import org.odftoolkit.simple.table.Table;

public class Image2Spreadsheet {

  private static final int BYTE_MASK = 0xFF;

  public static void main(String[] args) {

    if (args.length != 2) {
      System.out.println("Usage: Image2Spreadsheet source-image destination-spreadsheet");
    }

    final File source = new File(args[0]);
    final File dest = new File(args[1]);

    try {
      SpreadsheetDocument doc = SpreadsheetDocument.newSpreadsheetDocument();
      BufferedImage img = ImageIO.read(source);
      generateImage(doc, img);
      doc.save(dest);
    } catch (Exception e) {
      e.printStackTrace();
    }

  }

  private static void generateImage(SpreadsheetDocument doc, BufferedImage img) {
    final int width = img.getWidth();
    final int height = img.getHeight();

    final Iterator<Color> sourceColors = IntStream.of(img.getRGB(0, 0, width, height, null, 0, width))//
        .mapToObj(Image2Spreadsheet::rgbToColor)//
        .iterator();

    final Table table = doc.addTable(height, width + 1); // with 1 pixel border
    table.setTableName("Image");
    doc.removeSheet(0);

    table.getColumnList().forEach(c -> c.setWidth(5));
    table.getRowList().forEach(h -> h.setHeight(5, false));

    for (int y = 0; y < height; y++) {
      if (y % Math.max(1, (height / 100)) == 0) {
        System.out.println("Line " + (y + 1) + " / " + height + " " + ((y + 1) * 100) / height + " %");
      }

      for (int x = 0; x < width; x++) {
        // happy garbage collecting
        table.getCellByPosition(x, y).setCellBackgroundColor(sourceColors.next());
      }
    }

    if ((height - 1) % Math.max(1, (height / 100)) != 0) {
      System.out.println("Line " + height + " / " + height + " 100 %");
    }

  }

  private static Color rgbToColor(int rgb) {
    return new Color((rgb >> 16) & BYTE_MASK, (rgb >> 8) & BYTE_MASK, (rgb >> 0) & BYTE_MASK);
  }
}