image processingpreview
I have a multi-page PDF.
I want to make a PNG which is just all of these pages appended. I.e., the bottom of page 1 is attached to the top of page 2, etc.
Preview.app's Export… > PNG option saves it as a … multi-page PNG? I didn't know those were possible, but Preview opens up this PNG like it has many pages and Safari doesn't seem to be able to display both these "pages" properly.
I just want to convert a PDF into a very tall PNG, which is all of the pages on top of each other.
This works for me on Mountain Lion:
Open all the JPG's in Preview so that the files are selectable within the one window, i.e. thumbnails of the JPG's are viewable in the selection pane located the window's left side.
Click in the selection pane and select all the thumbnails with Cmd-A.
Select File > Print... from the menu bar.
Select PDF > (from the drop down) Save as PDF... from within the Print Dialog.
Take it from there...
Here is how to use Safari to print an image to span multiple pages:
1) Open the image to be printed in Safari. If it is a local file, then choose File -> Open File.... Or if you already have the file open in Preview, you can drag the icon of the file from the title bar of the Preview window onto the Safari window or Safari icon in the dock. Otherwise, load the image from the Internet however you usually would.
2) Go to File -> Print... and then change the Scale (%) so that the image is the desired size. If you do not see the place to change the Scale, you may need to press the Show Details button. Safari will show you a preview of how the image will appear on each page, so you can see how big the resulting image will be. For the example, you can get the entire width on a single page, but the image will span 2 pages in length.
You may want to choose borderless printing if your printer supports it. For instance, for my Canon inkjet, I set the paper size to US Letter (borderless). However, I was not successful in achieving borderless printing in my one trial; Safari still left white borders around the image that I later had to trim.
3) Click print. Collect your prize from the printer. Trim away white space and then combine the different pages using tape, etc.
Best Answer
There is an app PDFElement6, a free trial version is available that will do what you want. The trail version is limited to only a five page PDF.