public void TestCutting()
{
var session = new WebSession();
var buf = session.GetRaw("https://www.baidu.com/img/PCtm_d9c8750bed0b3c7d089fa7d55720d6cf.png");
var ms = new MemoryStream(buf);
var img = (Bitmap)Image.FromStream(ms);
var eff = new EffImage(img);
// 透明底rgb是0
eff.ProcessEach((_, i, j) =>
{
var color = _.At(i, j);
if (color.R == 0)
{
_.Set(i, j, Color.White);
}
});
eff.GrayScale();
eff.AdativeBinarization();
eff = EffImage.CutH(eff, 200, 330);
eff = EffImage.CutV(eff, 100, 230);
eff.Origin.Save("z:/cut.bmp");
}
public void TestOCR()
{
var img = new EffImage((Bitmap)Bitmap.FromFile("z:/test.jpg"));
img.GrayScale();
img.Binarization(100);
img.Origin.Save("z:/test_bin.bmp");
img = EffImage.Resize(img, 1024, 768);
var vhist = img.ProjectionHistV();
// 用垂直投影找底部
var bottom = img.Bottom;
int upperBound = 0;
for (upperBound = bottom; upperBound > 0; upperBound--)
{
if (vhist[upperBound] <= 5)
{
break;
}
}
var idImg = EffImage.CutV(img, upperBound, bottom);
idImg.ClearNoise(3);
idImg.Binarization(50);
var area = idImg.ConnectedAreas;
int i = 0;
foreach (var item in area)
{
var rect = item.ValidArea;
var seg = EffImage.CutH(EffImage.CutV(idImg, rect.Top, rect.Bottom), rect.Left, rect.Right);
var resz = EffImage.Resize(seg, 32, 32);
resz.Origin.Save($"z:/seg/{i++}.bmp");
}
}