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Update Service.cs #2

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28 changes: 16 additions & 12 deletions CaptchaDemo/Service.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -178,28 +178,32 @@ public static byte[] GetPictureData(string ImagePath)
fs.Close();
return byData;
}
public static TFGraph ImConvertGraph(TFTensor image, out TFOutput input, out TFOutput output)
public static TFGraph ImConvertGraph(out TFOutput input, out TFOutput output)
{
var graph = new TFGraph();
input = graph.Placeholder(TFDataType.String);

List<int> resize = config.Pretreatment.Resize != null ? config.Pretreatment.Resize : new List<int> { config.Model.ImageWidth, config.Model.ImageHeight };
int W = resize[0];
int H = resize[1];
TFOutput src = graph.Cast(graph.DecodePng(contents: input, channels: 1), DstT: TFDataType.Float);
TFOutput origin = graph.Reshape(src, graph.Const(new int[] { H, W }));
TFOutput swapaxes = graph.Transpose(origin, graph.Const(new int[] { 1, 0 }));
output = graph.Div(
graph.Reshape(swapaxes, graph.Const(new int[] { W, H, 1 })),
y: graph.Const((float)255)
);
output = graph.ExpandDims(output, dim: graph.Const(0));

var image_reader = graph.DecodeJpeg(contents: input, channels: 1);
var _dims_expander = graph.ExpandDims(image_reader, graph.Const(0));
var _resize = graph.ResizeArea(_dims_expander, graph.Const(new int[] { H, W }));
var _reshape = graph.Reshape(graph.Cast(_resize, TFDataType.Float), graph.Const(new int[] { H, W }));
var transpose = graph.Transpose(_reshape, graph.Const(new int[] { 1, 0 }));
var resized = graph.Reshape(transpose, graph.Const(new int[] { W, H, 1 }));
var dims_expander = graph.ExpandDims(resized, graph.Const(0));

output = graph.Div(dims_expander, graph.Const(255));

return graph;
}
public static TFTensor FormatJPEG(byte[] d)
public static TFTensor FormatJPEG(byte[] buffer)
{
var g = TFTensor.CreateString(d);
var g = TFTensor.CreateString(buffer);
TFOutput input, output;
using (var graph = ImConvertGraph(g, out input, out output))
using (var graph = ImConvertGraph(out input, out output))
{
using (var session = new TFSession(graph))
{
Expand Down