IAC LeadTunstateCherenkovCrystalTests 2-15: Difference between revisions
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=2/17/15= | =2/17/15= | ||
Beam profile measurements using glass plates separated by 40.4 cm | Beam profile measurements using glass plates separated by 40.4 cm | ||
[[File:NearBP_021715-9.52.png]][[File:RearBP_021715-9.52.png]] | [[File:NearBP_021715-9.52.png| 200 px]][[File:RearBP_021715-9.52.png| 200 px]] | ||
;After calibrating . | |||
[[File:CalNearBP_021715-9.52.png| 200 px]][[File:CalRearBP_021715-9.52.png| 200 px]] | |||
=2/20/15= | |||
[[File:NearBP_022015-7.35.png| 200 px]][[File:NearBP_022015-7.47.png| 200 px]][[File:RearBP_022015-7.47.png| 200 px]] | |||
=Root script= | |||
The Image2Hist.C program from the ROOT tutorials | |||
<pre> | |||
//Create a 2-D histogram from an image. | |||
//Author: Olivier Couet | |||
void image2hist() | |||
{ | |||
// TASImage image("rose512.jpg"); | |||
TASImage image("test.png"); | |||
UInt_t yPixels = image.GetHeight(); | |||
UInt_t xPixels = image.GetWidth(); | |||
UInt_t *argb = image.GetArgbArray(); | |||
TH2D* BeamShape = new TH2D("BeamShape","BeamShape",xPixels,-1,1,yPixels,-1,1); | |||
for (int row=0; row<xPixels; ++row) { | |||
for (int col=0; col<yPixels; ++col) { | |||
int index = col*xPixels+row; | |||
float grey = float(argb[index]&0xff)/256; | |||
BeamShape->SetBinContent(row+1,yPixels-col,grey); | |||
} | |||
} | |||
gStyle->SetPalette(53); | |||
BeamShape->Draw("colz"); | |||
} | |||
</pre> | |||
[[IAC_Experiments]] | [[IAC_Experiments]] | ||
Latest revision as of 16:29, 20 February 2015
2/17/15
Beam profile measurements using glass plates separated by 40.4 cm
- After calibrating .
File:CalNearBP 021715-9.52.png
2/20/15
Root script
The Image2Hist.C program from the ROOT tutorials
//Create a 2-D histogram from an image.
//Author: Olivier Couet
void image2hist()
{
// TASImage image("rose512.jpg");
TASImage image("test.png");
UInt_t yPixels = image.GetHeight();
UInt_t xPixels = image.GetWidth();
UInt_t *argb = image.GetArgbArray();
TH2D* BeamShape = new TH2D("BeamShape","BeamShape",xPixels,-1,1,yPixels,-1,1);
for (int row=0; row<xPixels; ++row) {
for (int col=0; col<yPixels; ++col) {
int index = col*xPixels+row;
float grey = float(argb[index]&0xff)/256;
BeamShape->SetBinContent(row+1,yPixels-col,grey);
}
}
gStyle->SetPalette(53);
BeamShape->Draw("colz");
}