02-22-2020, 09:59 AM
(This post was last modified: 02-22-2020, 11:56 AM by rich2005.
Edit Reason: edit
)
Are you really using Gimp 2.8 ?
More than just a remove-speckle problem. Several hundred scans and 1 bit (black / white) images.
Several hundred, and the usual advice from the clever guys is "write a script" and apply in a batch file.
I am not that clever so I will use two Gimp plug-ins gimp-gmic to improve the scan http://www.gmic.eu and BIMP https://alessandrofrancesconi.it/projects/bimp/ for "several hundred" Both come with Windows installers.
Individually the workflow is
convert the image to grayscale (for gmic)
apply the gmic repair scanned document filter.
I have gone a little step further and used a script to quickly apply the gmic filter. Attached gmic_shell.zip Unzip put gmic_shell.scm in C:\Users\"yourname"\.gimp-2.8\scripts
Then for several hundred apply that procedure using the plugin BIMP.
The whole thing in 3 minutes https://youtu.be/hVE6pJXjF74
edit: add a pre-despeckle to the script for large speckles.
Quote:I have several hundred scanned pages I received as 1-bit images. The person that scanned them left a LOT of specks 1 to 10 pixels in diameter.
More than just a remove-speckle problem. Several hundred scans and 1 bit (black / white) images.
Several hundred, and the usual advice from the clever guys is "write a script" and apply in a batch file.
I am not that clever so I will use two Gimp plug-ins gimp-gmic to improve the scan http://www.gmic.eu and BIMP https://alessandrofrancesconi.it/projects/bimp/ for "several hundred" Both come with Windows installers.
Individually the workflow is
convert the image to grayscale (for gmic)
apply the gmic repair scanned document filter.
I have gone a little step further and used a script to quickly apply the gmic filter. Attached gmic_shell.zip Unzip put gmic_shell.scm in C:\Users\"yourname"\.gimp-2.8\scripts
Then for several hundred apply that procedure using the plugin BIMP.
The whole thing in 3 minutes https://youtu.be/hVE6pJXjF74
edit: add a pre-despeckle to the script for large speckles.