How to retrieve width and height of JPG and PDFs?
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How to retrieve width and height of JPG and PDFs?
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Best answer by mac_sp
For the JPG, you can extract the width and height from the IFMERaster information:
Running your JPG features through a GeometryExtractor into Well Known Text will return a Polygon geometry type with the four corners of your image, as such:
POLYGON ((0 -960,0 0,528 0,528 -960,0 -960))
Your image width is simply the non-zero x coordinate and your height is the non-zero y coordinate.
For the PDF, you need to read rasterized pages in the reader parameters:
This will provide the Raster extents for each page (the 'pdf_page_number' attribute tracks the page number) and you can complete the above steps with the GeometryExtractor to derive the height and width.
EDIT: A CoordinateExtractor could be used to produce a similar result, simply depends on the user preference.
For the JPG, you can extract the width and height from the IFMERaster information:
Running your JPG features through a GeometryExtractor into Well Known Text will return a Polygon geometry type with the four corners of your image, as such:
POLYGON ((0 -960,0 0,528 0,528 -960,0 -960))
Your image width is simply the non-zero x coordinate and your height is the non-zero y coordinate.
For the PDF, you need to read rasterized pages in the reader parameters:
This will provide the Raster extents for each page (the 'pdf_page_number' attribute tracks the page number) and you can complete the above steps with the GeometryExtractor to derive the height and width.
EDIT: A CoordinateExtractor could be used to produce a similar result, simply depends on the user preference.
mac_sp wrote:
For the JPG, you can extract the width and height from the IFMERaster information:
Running your JPG features through a GeometryExtractor into Well Known Text will return a Polygon geometry type with the four corners of your image, as such:
POLYGON ((0 -960,0 0,528 0,528 -960,0 -960))
Your image width is simply the non-zero x coordinate and your height is the non-zero y coordinate.
For the PDF, you need to read rasterized pages in the reader parameters:
This will provide the Raster extents for each page (the 'pdf_page_number' attribute tracks the page number) and you can complete the above steps with the GeometryExtractor to derive the height and width.
EDIT: A CoordinateExtractor could be used to produce a similar result, simply depends on the user preference.
Additionally, you may be interested in the native size of each image contained within the PDF. In that case, you should use the "Spatial > Read Images" option to read each image object, and then look at the raster properties as usual.
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