BatchScanPlus (BSP) can generate Acrobat PDF files from images easily.
Click the toolbar button or the File > Create PDF menu command to make the Create PDF screen appear.
The PDF Creation screen is divided in two tabs, one for adding and sorting the images to be used and the other for setting all options for the PDF file.
Images can be added by using the Add Files or Add Folder buttons.
If the images were generated by BSP the will be numbered sequentially, but if any page number is missing, BSP will ask if blank pages are to be inserted automatically, where needed.
The image file list can be sorted and arranged. Files can be removed from the list or added to it at any moment.
When any image file is selected, it will be shown on the right side at once.
Image files can be handled either by using the toolbar buttons located at the bottom of the screen or the contextual menu that pop-ups when the right mouse button is clicked.
Use the Save and Load Settings buttons to save both the file list as all the options in the Settings tab in a file, or to load the file list and options from a previously saved file.
The contextual menu as commands for editing and replacing the selected image file by a blank page as well.
Also the Set PDF Page size according the selected image size can used to set the PDF Page size automatically.
After the list of files is complete and before generating the PDF file, options for PDF file generation can be set by using the Settings Tab.
Here the paper size, margins, image compression and resizing options can be set.
The Blank Page legend sets the text (if any) that is to be shown on blank pages. Blank pages are appear in the PDF document in any place where a Blank Page was inserted in the file list. Where a blank page appears, the files list shows BLANK PAGE instead an image file name.
Specify Footers and/or Headers options if you removed the pages footers/headers when scanning and want to replace them with other ones.
The option Draw as a Bitmap is intended to produce PDF files that can be OCR processed by Acrobat.
If the Roman numerals option is selected, the footers/headers can show roman numerals in the first pages and arabic ones in the remaining pages.
After setting the options for numerals, by clicking on the files on the File list you can preview how numeral option affect the numbering. Learn more.
If Apply Blur filter is selected, images will be softened to get best looking pages (when softening black & white images the PDF will grow in size because the images inside it will be converted to grayscale).
Click the Save PDF button on the bottom to actually generate the PDF file.
The source images file format does not affect the PDF file size, only the options set in the Settings tab and the source images size (width and height in pixels) will have an influence in the size of the created PDF files.
If the Image Compress Mode is None the images will take a lot of space, so that setting is deprecated.
Usually, for black and white or 8 bit palette color images the Image Compress Mode should be Lossless.
JPEG compression (JPEG Image Compress Mode) only can be applied to Grayscale or 24 bit color images.
The JPEG Quality default setting is 50%, which will create high quality PDF files.
Values between 20% and 50% are recommended. Lower values generate smaller files with less image quality.
Selecting values less than 10% will produce bad looking files and values higher than 50% will not increase much more the quality but surely will produce bigger files.
Another option to reduce the PDF file size is selecting an Image Reduction percentage.
It is not recommended reducing the images size if they were scanned at less than 150 DPI.
Images scanned at 300 DPI can be reduced to 50% image size and still produce good looking PDF files.
With images from digital cameras it would be advisable to do some tests to see how much they can reduced.
The compression and Image Reduction settings specified when generating PDFs will not change the source image files at all, only will affect the generated PDF file.