Imported Image Resolution

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   SOLUTION FOUND !!!
The problem is due to the fact that in any case the imported image is managed as it would have a resolution of 72 DPI.
In this case the PDF page takes its dimensions according to this wrong assumption.
To solve the problem it is mecessary to apply a scale factor from the default wrong 72 DPI resolution to the right one:

Note DPIres is the real image resolution...

            double ImageWidthInPoints = (double)QP.ImageWidth() / dpix * DPIres;
            double ImageHeightInPoints = (double)QP.ImageHeight() / dpiy * DPIres;
            int pW=QP.ImageWidth();
            int pH= QP.ImageHeight();
            QP.SetOrigin(1);
            i = QP.DrawImage(0, 0, pW, pH);
            float stdRes = 72;
            float PageScale = stdRes / DPIres;
            QP.SetPageDimensions((pW * PageScale), (pH * PageScale));
            QP.FitImage(0, 0, (pW * PageScale), (pH * PageScale), 0, 0, 0);
            i = QP.SaveToFile(filePDF);

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MarcoAbbate Members Profile Find Members Posts Beginner Joined: 23 Mar 15 Location: Rome - Italy Status: Offline Points: 6	Post Options Post Reply Quote MarcoAbbate Report Post Thanks(0) Quote Reply Topic: Imported Image Resolution Posted: 25 Mar 15 at 11:41AM
	SOLUTION FOUND !!! The problem is due to the fact that in any case the imported image is managed as it would have a resolution of 72 DPI. In this case the PDF page takes its dimensions according to this wrong assumption. To solve the problem it is mecessary to apply a scale factor from the default wrong 72 DPI resolution to the right one: Note DPIres is the real image resolution... double ImageWidthInPoints = (double)QP.ImageWidth() / dpix * DPIres; double ImageHeightInPoints = (double)QP.ImageHeight() / dpiy * DPIres; int pW=QP.ImageWidth(); int pH= QP.ImageHeight(); QP.SetOrigin(1); i = QP.DrawImage(0, 0, pW, pH); float stdRes = 72; float PageScale = stdRes / DPIres; QP.SetPageDimensions((pW * PageScale), (pH * PageScale)); QP.FitImage(0, 0, (pW * PageScale), (pH * PageScale), 0, 0, 0); i = QP.SaveToFile(filePDF);

MarcoAbbate Members Profile Find Members Posts Beginner Joined: 23 Mar 15 Location: Rome - Italy Status: Offline Points: 6	Post Options Post Reply Quote MarcoAbbate Report Post Thanks(0) Quote Reply Posted: 24 Mar 15 at 9:15AM
	Hi everybody! I'm facing a strange behaviour importing images using the function "DrawImage". I have a JPEG image with a resolution on 150DPI. Its dimensions are 404x275 mm. When I import the image, the PDF page has the dimensions of 841.7x573.3 mm. After some tests I found the dimensions of the PDF page are equal to the image dimesions IF THE IMAGE WAS AT 72DPI... I tried to set the correct dimensions as follows, even if some functions are redundant: int pW=QP.ImageWidth(); int pH= QP.ImageHeight(); QP.SetPageDimensions(pW ,pH); QP.SetImageResolution(150, 150, 2); QP.FitImage(0, 0, pW, pH, 0, 0, 0); QP.SetOrigin(1); i = QP.DrawImage(0, 0, pW, pH); i = QP.SaveToFile(filePDF); But I always get the same wrong dimensions (841.7x573.3 mm) in the output. I tried to import JPEG, TIFF and BMP image, always with the same wrong result. Note the images by themselves are correct, with the right ( 404x275 mm). Do you have any hint or solution about this issue? Thank you very much in advance! Marco.