Exemple #1
0
 private static extern void Search1(structs.ImgQuery query);
Exemple #2
0
        public static ui.model.SearchResult Search(byte[] imgContent)
        {
            Contract.Requires(imgContent != null);
            Contract.Requires(imgContent.Length != 0);

            IntPtr imgContentUnmanagedBuf = IntPtr.Zero;
            var    result = new structs.SearchResult()
            {
                items          = IntPtr.Zero,
                itemsPositions = IntPtr.Zero
            };

            try
            {
                imgContentUnmanagedBuf = Marshal.AllocCoTaskMem(imgContent.Length);
                Marshal.Copy(imgContent, 0, imgContentUnmanagedBuf, imgContent.Length);

                var query = new structs.ImgQuery()
                {
                    exampleContent     = imgContentUnmanagedBuf,
                    exampleContentSize = (UInt32)imgContent.Length,
                    tolerance          = 0.5
                };

                Search(query, out result);

                if (result.opStatus != 0)
                {
                    throw new Exception("Call to the unmanaged DLL failed. Search cannot be performed");
                }

                if (result.items == IntPtr.Zero || result.itemsPositions == IntPtr.Zero || result.arraySize == 0)
                {
                    //no images found
                    return(new ui.model.SearchResult());
                }

                long[]   imgIds    = new long[result.arraySize];
                double[] positions = new double[result.arraySize];
                Marshal.Copy(result.items, imgIds, 0, (int)result.arraySize);
                Marshal.Copy(result.itemsPositions, positions, 0, (int)result.arraySize);

                return(new ui.model.SearchResult(imgIds, positions));
            }
            finally
            {
                if (imgContentUnmanagedBuf != IntPtr.Zero)
                {
                    Marshal.FreeCoTaskMem(imgContentUnmanagedBuf);
                }

                if (result.items != IntPtr.Zero)
                {
                    Marshal.FreeCoTaskMem(result.items);
                }

                if (result.itemsPositions != IntPtr.Zero)
                {
                    Marshal.FreeCoTaskMem(result.itemsPositions);
                }
            }
        }
Exemple #3
0
 private static extern void Search(structs.ImgQuery query, out structs.SearchResult result);