09-24-2022, 05:04 PM
The problem is that the algorithm isn't intelligent enough to understand what the pixels are representing. It can't know when there is text it should ignore versus black marks from a poor scan, or other kinds of markings. With the default crop mode it just stops as soon as it hits any pixels that are darker than a light gray. With the aggressive mode, it will small groupings of pixels (noise from a scan), but it will still stop as soon as it hits a larger block of dark pixels. In order to implement what you are discussing, it would involve something more akin to performing a text OCR where MobileSheets could look for text on the page, determine what that text is, where it's located, and then choose whether to ignore it with the cropping. The PDF library I'm using does not support text OCR, so I don't really have a good solution for that.
I should mention that if the PDF actually contains text instead of just an image, that could be identified and ignored as part of the cropping. Most users have PDFs that are constructed from scanned scores though, so I doubt that is particularly useful in most scenarios.
One thing some users have asked for are predefined sizes for cropping rectangles so that a given sized cropping rectangle could quickly be applied to all pages. This is something I will most likely add. So if you know that you always want to remove the bottom 2.5% of every page, for example, then you could save those dimensions and apply it to your scores that have the wording at the bottom. Also be aware that you can setup the cropping so that any adjustments you make on a page are applied to all pages in the file. If you want the cropping the same on every page, this could save you some time.
Mike
I should mention that if the PDF actually contains text instead of just an image, that could be identified and ignored as part of the cropping. Most users have PDFs that are constructed from scanned scores though, so I doubt that is particularly useful in most scenarios.
One thing some users have asked for are predefined sizes for cropping rectangles so that a given sized cropping rectangle could quickly be applied to all pages. This is something I will most likely add. So if you know that you always want to remove the bottom 2.5% of every page, for example, then you could save those dimensions and apply it to your scores that have the wording at the bottom. Also be aware that you can setup the cropping so that any adjustments you make on a page are applied to all pages in the file. If you want the cropping the same on every page, this could save you some time.
Mike