图片如何移动一个像素,更改其MD5值 .net c#

Question

移动一像素?整行或整列移动吧?

Answer 1

嗯 随便反正移动一像素，更改他的MD5值~~

Answer 2

        /// <summary>
        /// 平移图像
        /// </summary>
        /// <param name="bm"></param>
        /// <param name="nOffset">平移的方向</param>
        /// <param name="nOffset">平移的偏移量</param>
        /// <param name="nOffset">平移的填充像素</param>
        private void Translate(Bitmap bm, Direction Direction, int nOffset, Color crFill)
        {
            switch (Direction)
            {
                case Direction.Left:
                    {
                        // 向左平移 nDeep 位
                        for (int idxCol = nOffset; idxCol < bm.Width; ++idxCol)
                        {
                            int idxColDst = idxCol - nOffset;                            for (int idxRow = 0; idxRow < bm.Height; ++idxRow)
                            {
                                Color crSrc = bm.GetPixel(idxCol, idxRow);
                                bm.SetPixel(idxColDst, idxRow, crSrc);
                            }
                        }
                        // 被移空的地方填充crFill设定的背景
                        FillRect(bm,
                            new Point(bm.Width - nOffset, 0),
                            new Point(bm.Width - 1, bm.Height - 1),
                            crFill);
                    }
                    break;                case Direction.Right:
                    {
                        // 向右平移 
                        for (int idxCol = bm.Width - nOffset - 1; idxCol >= 0; --idxCol)
                        {
                            int idxColDst = idxCol + nOffset;                            for (int idxRow = 0; idxRow < bm.Height; ++idxRow)
                            {
                                Color crSrc = bm.GetPixel(idxCol, idxRow);
                                bm.SetPixel(idxColDst, idxRow, crSrc);
                            }
                        }
                        // 填充
                        FillRect(bm,
                            new Point(0, 0),
                            new Point(nOffset - 1, bm.Height - 1),
                            crFill);
                    }
                    break;                case Direction.Down:
                    {
                        // 向下平移 
                        for (int idxRow = bm.Height - nOffset - 1; idxRow >= 0; --idxRow)
                        {
                            int idxRowDst = idxRow + nOffset;                            for (int idxCol = 0; idxCol < bm.Width; ++idxCol)
                            {
                                Color crSrc = bm.GetPixel(idxCol, idxRow);
                                bm.SetPixel(idxCol, idxRowDst, crSrc);
                            }
                        }
                        // 填充
                        FillRect(bm,
                            new Point(0, 0),
                            new Point(bm.Width - 1, nOffset - 1),
                            crFill);
                    }
                    break;                case Direction.Up:
                    {
                        // 向上平移 
                        for (int idxRow = nOffset; idxRow < bm.Height; ++idxRow)
                        {
                            int idxRowDst = idxRow - nOffset;                            for (int idxCol = 0; idxCol < bm.Width; ++idxCol)
                            {
                                Color crSrc = bm.GetPixel(idxCol, idxRow);
                                bm.SetPixel(idxCol, idxRowDst, crSrc);
                            }
                        }
                        // 填充
                        FillRect(bm,
                            new Point(0, bm.Height - nOffset),
                            new Point(bm.Width - 1, bm.Height - 1),
                            crFill);
                    }
                    break;            }
        }        /// <summary>
        /// 填充矩形
        /// </summary>
        /// <param name="bm">要填充的图像</param>
        /// <param name="ptStart">填充开始位置</param>
        /// <param name="ptEnd">填充结束位置</param>
        /// <param name="ptEnd">填充的像素值</param>
        private void FillRect(Bitmap bm, Point ptStart, Point ptEnd, Color crFill)
        {
            for (int idxCol = ptStart.X; idxCol <= ptEnd.X; ++idxCol)
            {
                for (int idxRow = ptStart.Y; idxRow <= ptEnd.Y; ++idxRow)
                {
                    bm.SetPixel(idxCol, idxRow, crFill);
                }
            }
        }