/// <summary>
/// Driver function for the
/// decoding solution
/// </summary>
private static void Main()
{
// Initialize ImageGear.
InitializeImageGear();
// load image
ImGearPage igPage = LoadPageFromLocalFile(micInstancePath);
// get image dib
ImGearDIB igDIB = igPage.DIB;
// get image dimensions
int height = igDIB.Height;
int width = igDIB.Width;
// get table dimensions
int totalRows = height / encodingWidth;
int totalColumns = width / encodingWidth;
// storage for image's row values
Dictionary <int, int> rowSumDict = new Dictionary <int, int>();
// step through pixel space
foreach (int x_position in MoreEnumerable.Sequence(patternOffset, width, encodingWidth))
{
foreach (int y_position in MoreEnumerable.Sequence(patternOffset, height, encodingWidth))
{
if (IsYellowDot(igDIB, x_position, y_position))
{
// define table coordinates
int columnValue = (x_position - patternOffset) / encodingWidth + 1;
int rowValue = (y_position - patternOffset) / encodingWidth + 1;
if (IsUpdateableCoordinate(rowValue, columnValue))
{
UpdateValueDict(ref rowSumDict, rowValue, columnValue, totalColumns);
}
}
}
}
// create answer strings for output
string serialAnswer = StringifyAnswer(rowSumDict, serialRows);
string yearAnswer = StringifyAnswer(rowSumDict, yearRows);
string monthAnswer = StringifyAnswer(rowSumDict, monthRows);
string dayAnswer = StringifyAnswer(rowSumDict, dayRows);
string hourAnswer = StringifyAnswer(rowSumDict, hourRows);
string minuteAnswer = StringifyAnswer(rowSumDict, minuteRows);
Console.WriteLine(string.Format(answerString, serialAnswer, monthAnswer, dayAnswer, yearAnswer, hourAnswer, minuteAnswer));
Console.ReadKey();
}
/**
* Program entry point.
*/
static void Main(string[] args)
{
InitImageGear();
using (Stream mergedStream = new FileStream(mergedImageFilepath, FileMode.Open))
using (Stream recoveredStream = new FileStream(recoveredImageFilepath, FileMode.Create))
{
// load merged image
ImGearPage mergedImage = ImGearFileFormats.LoadPage(mergedStream);
// extract hidden image
ImGearPage recoveredImage = ExtractHiddenImage(mergedImage);
ImGearFileFormats.SavePage(recoveredImage, recoveredStream, ImGearSavingFormats.PNG);
}
}
//This function should return an ImGearPage that contains the extracted hidden image
public static ImGearPage ExtractHiddenImage(ImGearPage mergedImage)
{
int bitNum = 1;
int bitShift = mergedImage.DIB.BitsPerChannel - bitNum;
int bitMask = 0xFF >> bitShift;
int imageWidth = mergedImage.DIB.Width;
int imageHeight = mergedImage.DIB.Height;
// initialize blank ImGearRasterPage
ImGearPage hidden = new ImGearRasterPage(imageWidth, imageHeight, new ImGearColorSpace(ImGearColorSpaceIDs.RGBA), new int[] { 8, 8, 8, 8 }, true);
// For Each Pixel
for (int x = 0; x < imageWidth; ++x)
{
for (int y = 0; y < imageHeight; ++y)
{
// Copy Pixel
ImGearPixel s = mergedImage.DIB.GetPixelCopy(x, y);
ImGearPixel p = new ImGearPixel(4, 8);
//For Each Channel
for (int c = 0; c < 3; ++c)
{
// Get Low bit
bool bit = (s[c] & (1 << 0)) != 0;
// Set to Either 1 or 0 Followed by 7 0s
if (bit)
{
p[c] = 128; //10000000
}
else
{
p[c] = 0; //0000000
}
}
// Keep Alpha Channel Intact
p[3] = 255;
// Set the Pixel
hidden.DIB.UpdatePixelFrom(x, y, p);
}
}
// Return Extracted Image
return(hidden);
}
