void img2pad()
{
// Display image in canvas and pad.
//Author: valeriy Onuchin
TImage *img = TImage::Open("rose512.jpg");
if (!img) {
printf("Could not create an image... exit\n");
return;
}
img->SetConstRatio(kFALSE);
img->Draw("N");
TCanvas *c = gROOT->GetListOfCanvases()->FindObject("rose512jpg");
c->SetFixedAspectRatio();
TCanvas *c = new TCanvas("roses", "roses", 800, 800);
img->Draw("T100,100,yellow");
//img->Draw("T100,100,#556655");
//img->Draw("T100,100");
TImage *i1 = TImage::Open("rose512.jpg");
i1->SetConstRatio(kFALSE);
i1->Flip(90);
TImage *i2 = TImage::Open("rose512.jpg");
i2->SetConstRatio(kFALSE);
i2->Flip(180);
TImage *i3 = TImage::Open("rose512.jpg");
i3->SetConstRatio(kFALSE);
i3->Flip(270);
TImage *i4 = TImage::Open("rose512.jpg");
i4->SetConstRatio(kFALSE);
i4->Mirror(kTRUE);
float d = 0.40;
TPad *p1 = new TPad("i1", "i1", 0.05, 0.55, 0.05+d*i1->GetWidth()/i1->GetHeight(), 0.95);
TPad *p2 = new TPad("i2", "i2", 0.55, 0.55, 0.95, 0.55+d*i2->GetHeight()/i2->GetWidth());
TPad *p3 = new TPad("i3", "i3", 0.55, 0.05, 0.55+d*i3->GetWidth()/i3->GetHeight(), 0.45);
TPad *p4 = new TPad("i4", "i4", 0.05, 0.05, 0.45, 0.05+d*i4->GetHeight()/i4->GetWidth());
p1->Draw();
p1->cd();
i1->Draw();
c->cd();
p2->Draw();
p2->cd();
i2->Draw();
c->cd();
p3->Draw();
p3->cd();
i3->Draw();
c->cd();
p4->Draw();
p4->cd();
i4->Draw();
c->cd();
}
void img2pad()
{
TImage *img = TImage::Open("$ROOTSYS/tutorials/image/rose512.jpg");
if (!img) {
printf("Could not create an image... exit\n");
return;
}
img->SetConstRatio(kFALSE);
img->Draw("N");
TCanvas *c = (TCanvas *)gROOT->GetListOfCanvases()->FindObject("rose512jpg");
c->SetFixedAspectRatio();
TCanvas *c1 = new TCanvas("roses", "roses", 800, 800);
img->Draw("T100,100,#ffff00");
/*img->Draw("T100,100,#556655");*/
/*img->Draw("T100,100");*/
TImage *i1 = TImage::Open("$ROOTSYS/tutorials/image/rose512.jpg");
i1->SetConstRatio(kFALSE);
i1->Flip(90);
TImage *i2 = TImage::Open("$ROOTSYS/tutorials/image/rose512.jpg");
i2->SetConstRatio(kFALSE);
i2->Flip(180);
TImage *i3 = TImage::Open("$ROOTSYS/tutorials/image/rose512.jpg");
i3->SetConstRatio(kFALSE);
i3->Flip(270);
TImage *i4 = TImage::Open("$ROOTSYS/tutorials/image/rose512.jpg");
i4->SetConstRatio(kFALSE);
i4->Mirror(kTRUE);
float d = 0.40;
TPad *p1 = new TPad("i1", "i1", 0.05, 0.55, 0.05+d*i1->GetWidth()/i1->GetHeight(), 0.95);
TPad *p2 = new TPad("i2", "i2", 0.55, 0.55, 0.95, 0.55+d*i2->GetHeight()/i2->GetWidth());
TPad *p3 = new TPad("i3", "i3", 0.55, 0.05, 0.55+d*i3->GetWidth()/i3->GetHeight(), 0.45);
TPad *p4 = new TPad("i4", "i4", 0.05, 0.05, 0.45, 0.05+d*i4->GetHeight()/i4->GetWidth());
p1->Draw();
p1->cd();
i1->Draw();
c1->cd();
p2->Draw();
p2->cd();
i2->Draw();
c1->cd();
p3->Draw();
p3->cd();
i3->Draw();
c1->cd();
p4->Draw();
p4->cd();
i4->Draw();
c1->cd();
}
void plot_logo( Float_t v_scale = 1.0, Float_t skew = 1.0 )
{
TImage *img = findImage("tmva_logo.gif");
if (!img) {
cout << "+++ Could not open image tmva_logo.gif" << endl;
return;
}
img->SetConstRatio(kFALSE);
UInt_t h_ = img->GetHeight();
UInt_t w_ = img->GetWidth();
Float_t r = w_/h_;
gPad->Update();
Float_t rpad = Double_t(gPad->VtoAbsPixel(0) - gPad->VtoAbsPixel(1))/(gPad->UtoAbsPixel(1) - gPad->UtoAbsPixel(0));
r *= rpad;
Float_t d = 0.055;
// absolute coordinates
Float_t x1R = 1 - gStyle->GetPadRightMargin();
Float_t y1B = 1 - gStyle->GetPadTopMargin()+.01; // we like the logo to sit a bit above the histo
Float_t x1L = x1R - d*r/skew;
Float_t y1T = y1B + d*v_scale*skew;
if (y1T>0.99) y1T = 0.99;
TPad *p1 = new TPad("imgpad", "imgpad", x1L, y1B, x1R, y1T );
p1->SetRightMargin(0);
p1->SetBottomMargin(0);
p1->SetLeftMargin(0);
p1->SetTopMargin(0);
p1->Draw();
Int_t xSizeInPixel = p1->UtoAbsPixel(1) - p1->UtoAbsPixel(0);
Int_t ySizeInPixel = p1->VtoAbsPixel(0) - p1->VtoAbsPixel(1);
if (xSizeInPixel<=25 || ySizeInPixel<=25) {
delete p1;
return; // ROOT doesn't draw smaller than this
}
p1->cd();
img->Draw();
}
void draw_activation(TCanvas* c, Double_t cx, Double_t cy,
Double_t radx, Double_t rady, Int_t whichActivation)
{
TImage *activation = NULL;
switch (whichActivation) {
case 0:
activation = TImage::Open("sigmoid-small.png");
break;
case 1:
activation = TImage::Open("line-small.png");
break;
default:
cout << "Activation index " << whichActivation << " is not known." << endl;
cout << "You messed up or you need to modify network.C to introduce a new "
<< "activation function (and image) corresponding to this index" << endl;
}
if (activation == NULL) {
cout << "Could not create an image... exit" << endl;
return;
}
activation->SetConstRatio(kFALSE);
radx *= 0.7;
rady *= 0.7;
TString name = Form("activation%f%f", cx, cy);
TPad* p = new TPad(name+"", name+"", cx-radx, cy-rady, cx+radx, cy+rady);
p->Draw();
p->cd();
activation->Draw();
c->cd();
}
void rose_image()
{
// Display image in a new canvas and pad.
TImage *img = TImage::Open("rose512.jpg");
if (!img) {
printf("Could not create an image... exit\n");
return;
}
img->SetConstRatio(0);
img->SetImageQuality(TAttImage::kImgBest);
TString fp = gEnv->GetValue("Root.TTFontPath", "");
TString bc = fp + "/BlackChancery.ttf";
TString ar = fp + "/arial.ttf";
// draw text over image with funny font
img->DrawText(120, 160, "Hello World!", 32,
gROOT->GetColor(4)->AsHexString(),
bc, TImage::kShadeBelow);
// draw text over image with foreground specified by pixmap
img->DrawText(250, 350, "goodbye cruel world ...", 24, 0,
ar, TImage::kPlain, "fore.xpm");
TImage *img2 = TImage::Open("mditestbg.xpm");
// tile image
img2->Tile(img->GetWidth(), img->GetHeight());
c1 = new TCanvas("rose512", "examples of image manipulations", 760, 900);
c1->Divide(2, 3);
c1->cd(1);
img->Draw("xxx");
img->SetEditable(kTRUE);
c1->cd(2);
// averaging with mditestbg.xpm image
TImage *img3 = (TImage*)img->Clone("img3");
img3->Merge(img2, "allanon");
img3->Draw();
// contrasting (tint with itself)
c1->cd(3);
TImage *img4 = (TImage*)img->Clone("img4");
img4->Merge(img4, "tint");
// draw filled rectangle with magenta color
img4->FillRectangle("#FF00FF", 20, 220, 40, 40);
// Render multipoint alpha-blended gradient (R->G->B)
img4->Gradient(0, "#FF0000 #00FF00 #220000FF", 0, 50, 50, 100, 100);
// draw semi-transparent 3D button
img4->Bevel(300, 20, 160, 40, "#ffffffff", "#fe000000", 3, 0);
img4->DrawLine(10, 100, 100, 10, "#0000ff", 4);
img4->Draw();
// vectorize image. Reduce palette to 256 colors
c1->cd(4);
TImage *img5 = (TImage*)img->Clone("img5");
img5->Vectorize(256);
img5->Draw();
// quantization of the image
c1->cd(5);
TImage *img6 = (TImage*)img->Clone("img6");
TImagePalette *pal = (TImagePalette *)&img5->GetPalette();
TArrayD *arr = img6->GetArray(50, 40, pal);
img6->SetImage(arr->GetArray(), 50, 40, pal);
img6->Draw();
// HSV adjustment (convert red to yellow)
c1->cd(6);
TImage *img7 = (TImage*)img->Clone("img7");
img7->HSV(0, 40, 40);
img7->Draw();
}