Split one image into six smaller, component images.
-
I have a deck of Elder Futhark rune cards I hand drew myself some 25 years ago. On a large paper card on a drawing board. Back then Google was the belated Messiah, and online services such as rune drawing or font composition where very scarce. I did it all my little old self with a T-square, ruler, pencil, and other such steam-punk devices. Having rediscovered the deck, I find the accuracy and attention to detail I put into each card remarkable; runes are drawn with black koki pens, on white card; the uniformity of line thickness close to perfect on most cards, and the points where lines meet have zero smudge or overlap, or whatever. These look, except for one or two, like they were printed. I want to capture all these cards for part of a digital work, and because the cards have aged some 25 years, their edges are not perfect, although each card is still a very good 80mm x 100mm. I scanned sets of six cards, in a grid style, on A4 paper, and used a white brush to remove edge markings and other unwanted spots from the cards. I now have six perfect enough composite images of 5670mm x 4730mm (3 cards wide, 2 deep on each image). These 'final' images are all nearly perfect size to be divided into 6 smaller images, that make up the large ones, So, from 5680mm wide, we get three cards 1890mm wide, and from 4739mm wide I get 2 2365mm cards. Now, how do I do this? Using a selection rectangle in Paint.NET is not for the feint of heart, and not much ambition for this task. I have done an incredibly lot of google research before asking here, but nearly all results advised I use the ImageMagic [^]`convert` command. I have tried several variants of the `convert` command to no avail, e.g. one gives a very small image out but still containing all six original images. Various other attempts here met with similarly strange results. The basic command I\m trying to use is:
convert 'LargeImage.jpg' -resize 120x120 thumbnail%03d.pngNo object is so beautiful that, under certain conditions, it will not look ugly. - Oscar Wilde
-
I have a deck of Elder Futhark rune cards I hand drew myself some 25 years ago. On a large paper card on a drawing board. Back then Google was the belated Messiah, and online services such as rune drawing or font composition where very scarce. I did it all my little old self with a T-square, ruler, pencil, and other such steam-punk devices. Having rediscovered the deck, I find the accuracy and attention to detail I put into each card remarkable; runes are drawn with black koki pens, on white card; the uniformity of line thickness close to perfect on most cards, and the points where lines meet have zero smudge or overlap, or whatever. These look, except for one or two, like they were printed. I want to capture all these cards for part of a digital work, and because the cards have aged some 25 years, their edges are not perfect, although each card is still a very good 80mm x 100mm. I scanned sets of six cards, in a grid style, on A4 paper, and used a white brush to remove edge markings and other unwanted spots from the cards. I now have six perfect enough composite images of 5670mm x 4730mm (3 cards wide, 2 deep on each image). These 'final' images are all nearly perfect size to be divided into 6 smaller images, that make up the large ones, So, from 5680mm wide, we get three cards 1890mm wide, and from 4739mm wide I get 2 2365mm cards. Now, how do I do this? Using a selection rectangle in Paint.NET is not for the feint of heart, and not much ambition for this task. I have done an incredibly lot of google research before asking here, but nearly all results advised I use the ImageMagic [^]`convert` command. I have tried several variants of the `convert` command to no avail, e.g. one gives a very small image out but still containing all six original images. Various other attempts here met with similarly strange results. The basic command I\m trying to use is:
convert 'LargeImage.jpg' -resize 120x120 thumbnail%03d.pngNo object is so beautiful that, under certain conditions, it will not look ugly. - Oscar Wilde
Sounds like you're looking for the
cropcommand[^]. :)The width and height of the geometry argument give the size of the image that remains after cropping, and x and y in the offset (if present) gives the location of the top left corner of the cropped image with respect to the original image.
"These people looked deep within my soul and assigned me a number based on the order in which I joined." - Homer
-
Sounds like you're looking for the
cropcommand[^]. :)The width and height of the geometry argument give the size of the image that remains after cropping, and x and y in the offset (if present) gives the location of the top left corner of the cropped image with respect to the original image.
"These people looked deep within my soul and assigned me a number based on the order in which I joined." - Homer
So I would effectively, on card at a time, crop the whole drawing down to one-card size, save that card size drawing under a new name, then recalculate the offset for the next card, 24 times. No great effort if I get the process right once to start with. Thanks.
No object is so beautiful that, under certain conditions, it will not look ugly. - Oscar Wilde
-
So I would effectively, on card at a time, crop the whole drawing down to one-card size, save that card size drawing under a new name, then recalculate the offset for the next card, 24 times. No great effort if I get the process right once to start with. Thanks.
No object is so beautiful that, under certain conditions, it will not look ugly. - Oscar Wilde
You should be able to do it with a single
-cropcommand:You can add the @ to the geometry argument to equally divide the image into the number of tiles generated.
convert -crop 120x120 LargeImage.jpg tiles/tile%03d.jpg
"These people looked deep within my soul and assigned me a number based on the order in which I joined." - Homer
-
So I would effectively, on card at a time, crop the whole drawing down to one-card size, save that card size drawing under a new name, then recalculate the offset for the next card, 24 times. No great effort if I get the process right once to start with. Thanks.
No object is so beautiful that, under certain conditions, it will not look ugly. - Oscar Wilde
Here's a link to the ImageMagick documentation for the crop command. From a quick look it will do exactly what you want. Link added: http://www.imagemagick.org/Usage/crop/[^] Cheers!
"I had the right to remain silent, but I didn't have the ability!"
Ron White, Comedian
-
Here's a link to the ImageMagick documentation for the crop command. From a quick look it will do exactly what you want. Link added: http://www.imagemagick.org/Usage/crop/[^] Cheers!
"I had the right to remain silent, but I didn't have the ability!"
Ron White, Comedian
What link? :confused:
No object is so beautiful that, under certain conditions, it will not look ugly. - Oscar Wilde
-
What link? :confused:
No object is so beautiful that, under certain conditions, it will not look ugly. - Oscar Wilde
Sorry, I added the link! Our office is out of coffee and I just came back from a three week vacation. Now where's that switch to turn my brain back on? :-D Cheers!
"I had the right to remain silent, but I didn't have the ability!"
Ron White, Comedian
