JPG pixel coordinates to PDF coordinates converter?

Forum|Forum|7 years ago
February 4, 2019
1 reply
4131 views

Hello,

Does anyone have a tool or know of the pixel conversions for a JPG image point to PDF document location?

Regards,

William Johnston

Acrobat SDK and JavaScript

This topic has been closed for replies.

Correct answer Thom Parker

Images are images, regardless of the file format they are all an array of pixels. The PDF coordinate spaces are all measured at 72points/inch. So if you know the image location, width, and height in PDF coordinates, then it's a straight forward conversion to find the location of a pixel.

For example, to get the horizontal coordinate:

xPDF = xImageCoord + xPixel * ImageWidthPDF/ImageWidthPixels

Of course, how this is done depends on the context. What are you trying to do?

Thom Parker

Correct answer

Community Expert

Images are images, regardless of the file format they are all an array of pixels. The PDF coordinate spaces are all measured at 72points/inch. So if you know the image location, width, and height in PDF coordinates, then it's a straight forward conversion to find the location of a pixel.

For example, to get the horizontal coordinate:

xPDF = xImageCoord + xPixel * ImageWidthPDF/ImageWidthPixels

Of course, how this is done depends on the context. What are you trying to do?

Thom Parker - Software Developer at PDFScriptingUse the Acrobat JavaScript Reference early and often

williamj58744152Author

Participant

Hello,

I would like to insert highlighted text from JPG images from Microsoft Azure Computer Vision OCR API.

Thanks for letting me know on the dpi for PDF.

I may need to create a formula.

Thank you.

Sincerely,

William Johnston

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