How does PDF turn into pictures

How do I export a picture in a PDF file? can use the screenshot tool, should be very convenient! But when the picture size is too large, you can not display the entire picture on the screen, the picture scaling, is able to display the entire picture, but in accordance with the zoom picture to the screenshot, screenshots of the picture size is too small, so that the picture is lossy.

So are we not going to be able to export the pictures in the PDF file? How do I export a picture in a PDF file and not be damaged at all? The following small series of pictures and texts for your detailed explanation:

Step 1th: Use Adobe Acrobat Professional Chinese version to open PDF file;

2nd step: After opening the PDF file, choose to export JPEG, two ways to choose one, the following figure:

Step 3rd: Export the JPEG parameter settings, enter the filename "P" in the "Save as" dialog box that pops up, then click "Settings", and then in the parameter dialog box that pops up, set the parameters as shown in the example:

Step 4th: Press "Save" in the Save As dialog box when you press OK in the Save as JPEG settings, and the processing progress appears in the lower-right corner.

After all the files have been exported, view the exported jpg files, similar to the following figure: