2 hours ago
I am using GIMP v3.2.4.
My grandmother had a 1920s photo album that she gave to my uncle before she passed. My uncle let me borrow the album to digitize photos for posterity and to share with the "clan." The album's pictures are so old and fragile that I could not remove them from their pages without destroying them. I wound up using a flatbed, full color scanner and scanning whole pages at 300 DPI. I would have scanned them at 600 DPI, but scanning 75 two-sided pages with two-to-three pictures per page would have taken twice the time and twice the digital footprint. Even at 300 DPI it still took me a few hours to carefully scan the album. Plus, you cannot improve image quality that did not exist in the first place.
I have already rotated pages 180° for the ones I scanned upside down to prevent damage to the album, and rough-cropped individual images down to their far borders. Now I need to straighten them out before I crop them further or use GIMP to remove the old-fashioned picture "corners." Most of the corners are (were) black, some brown, and quite a few were red after late 1928/early 1929. Pictures should be straightened out before cropping further or removing picture corners to help reduce anomalies. Not all, but most pictures need to be straightened by less than a couple degrees of rotation.
Does GIMP have a built-in tool, or can I download a plugin for v3.0 that will allow me to straighten pictures, so they truly are perpendicular?
I am new to using GIMP, but I am no stranger to photo, video, or audio editing. Thanks in advance for any helpful information.
My grandmother had a 1920s photo album that she gave to my uncle before she passed. My uncle let me borrow the album to digitize photos for posterity and to share with the "clan." The album's pictures are so old and fragile that I could not remove them from their pages without destroying them. I wound up using a flatbed, full color scanner and scanning whole pages at 300 DPI. I would have scanned them at 600 DPI, but scanning 75 two-sided pages with two-to-three pictures per page would have taken twice the time and twice the digital footprint. Even at 300 DPI it still took me a few hours to carefully scan the album. Plus, you cannot improve image quality that did not exist in the first place.
I have already rotated pages 180° for the ones I scanned upside down to prevent damage to the album, and rough-cropped individual images down to their far borders. Now I need to straighten them out before I crop them further or use GIMP to remove the old-fashioned picture "corners." Most of the corners are (were) black, some brown, and quite a few were red after late 1928/early 1929. Pictures should be straightened out before cropping further or removing picture corners to help reduce anomalies. Not all, but most pictures need to be straightened by less than a couple degrees of rotation.
Does GIMP have a built-in tool, or can I download a plugin for v3.0 that will allow me to straighten pictures, so they truly are perpendicular?
I am new to using GIMP, but I am no stranger to photo, video, or audio editing. Thanks in advance for any helpful information.
. In auto mode use either a horiizontal or vertical edge and draw in a measure line. Put the mode into "Image" (the right side icon). Click on straighten which rotates the image but resizes the canvas to suit.