How can I batch-process images to adjust contrast in terminal?
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I've scanned 200+ pages. I am wondering if it is possible to touch these up by running a batch command line image software with a contrast manipulation option. Essentially I am wanting to give a command such as:
image_software *.JPG --contrast -1
The pages I scanned have content on both sides. The smallest amount of the content from the reverse side is showing in the scanned image. It is like a watermark --- online annoying.
What software + command might work for what I am describing?
command-line image-processing
edited 21 mins ago
Zanna
51.6k13141244
asked May 17 '18 at 3:16
Ron PiggottRon Piggott
2661618
add a comment |
I've scanned 200+ pages. I am wondering if it is possible to touch these up by running a batch command line image software with a contrast manipulation option. Essentially I am wanting to give a command such as:
image_software *.JPG --contrast -1
The pages I scanned have content on both sides. The smallest amount of the content from the reverse side is showing in the scanned image. It is like a watermark --- online annoying.
What software + command might work for what I am describing?
command-line image-processing
edited 21 mins ago
Zanna
51.6k13141244
asked May 17 '18 at 3:16
Ron PiggottRon Piggott
2661618
I suspect you might be after the-brightness-contrastof imagemagick combined with aforloop. Some details here: imagemagick.org/script/… Let me know if this is something like what you are after?
– andrew.46
May 17 '18 at 7:06
@andrew.46 Yes this is what I am wanting to do. Perhaps a reduction by 10
– Ron Piggott
May 19 '18 at 4:01
add a comment |
I've scanned 200+ pages. I am wondering if it is possible to touch these up by running a batch command line image software with a contrast manipulation option. Essentially I am wanting to give a command such as:
image_software *.JPG --contrast -1
The pages I scanned have content on both sides. The smallest amount of the content from the reverse side is showing in the scanned image. It is like a watermark --- online annoying.
What software + command might work for what I am describing?
command-line image-processing
edited 21 mins ago
Zanna
51.6k13141244
asked May 17 '18 at 3:16
Ron PiggottRon Piggott
2661618
I've scanned 200+ pages. I am wondering if it is possible to touch these up by running a batch command line image software with a contrast manipulation option. Essentially I am wanting to give a command such as:
image_software *.JPG --contrast -1
The pages I scanned have content on both sides. The smallest amount of the content from the reverse side is showing in the scanned image. It is like a watermark --- online annoying.
What software + command might work for what I am describing?
command-line image-processing
command-line image-processing
edited 21 mins ago
Zanna
51.6k13141244
asked May 17 '18 at 3:16
Ron PiggottRon Piggott
2661618
edited 21 mins ago
Zanna
51.6k13141244
asked May 17 '18 at 3:16
Ron PiggottRon Piggott
2661618
edited 21 mins ago
Zanna
51.6k13141244
edited 21 mins ago
Zanna
51.6k13141244
edited 21 mins ago
Zanna
51.6k13141244
51.6k13141244
asked May 17 '18 at 3:16
Ron PiggottRon Piggott
2661618
asked May 17 '18 at 3:16
Ron PiggottRon Piggott
2661618
asked May 17 '18 at 3:16
Ron PiggottRon Piggott
2661618
2661618
I suspect you might be after the-brightness-contrastof imagemagick combined with aforloop. Some details here: imagemagick.org/script/… Let me know if this is something like what you are after?
– andrew.46
May 17 '18 at 7:06
@andrew.46 Yes this is what I am wanting to do. Perhaps a reduction by 10
– Ron Piggott
May 19 '18 at 4:01
add a comment |
I suspect you might be after the-brightness-contrastof imagemagick combined with aforloop. Some details here: imagemagick.org/script/… Let me know if this is something like what you are after?
– andrew.46
May 17 '18 at 7:06
@andrew.46 Yes this is what I am wanting to do. Perhaps a reduction by 10
– Ron Piggott
May 19 '18 at 4:01
I suspect you might be after the
-brightness-contrast of imagemagick combined with a for loop. Some details here: imagemagick.org/script/… Let me know if this is something like what you are after?– andrew.46
May 17 '18 at 7:06
I suspect you might be after the
-brightness-contrast of imagemagick combined with a for loop. Some details here: imagemagick.org/script/… Let me know if this is something like what you are after?– andrew.46
May 17 '18 at 7:06
@andrew.46 Yes this is what I am wanting to do. Perhaps a reduction by 10
– Ron Piggott
May 19 '18 at 4:01
@andrew.46 Yes this is what I am wanting to do. Perhaps a reduction by 10
– Ron Piggott
May 19 '18 at 4:01
add a comment |
1 Answer
1
active
oldest
votes
One excellent option is to use ImageMagick's -brightness-contrast option in combination with a bash for loop.
To see how it all works first find a test image and experiment with the following syntax:
convert -brightness-contrast 10x5 input.jpg output.jpg
The -brightness-contrast option has 2 elements:
-brightness. In the example above this has been set at 10 and possible settings are from -100 to +100. Positive values increase the brightness while negative values decrease the brightness. Using a '0' value means that the brightness will remain unchanged.
-contrast. In the example above this has been set at 5 and again possible settings are from -100 to +100. Positive values increase the contrast while negative values decrease the contrast. Using a '0' value means that the contrast will remain unchanged.
Once you have found the settings best for your image you can navigate to the folder holding your images and run a for loop:
for j in *.jpg
do
convert -brightness-contrast 10x5 "$j" altered_"$j"
done
Here you can see I have made a small naming alteration for the output file which you can of course tailor to your specific needs.
There are many different ways to accomplish your goal with ImageMagick but this would be my own choice as it is the easiest to use and to understand :).
References:
ImageMagick -brightness-contrast: All of the details on this command from the ImageMagick web site.
answered May 19 '18 at 4:46
andrew.46andrew.46
22.5k1471150
Is there a command which would allow me to rotate images by degrees? Such as 5 degrees left or 3 degrees right?
– Ron Piggott
May 21 '18 at 20:47
@RonPiggott Indeed there is :). Trying experimenting withconvert -rotate xxxcommand. I have not ever used this but I beieve the integer (where I have placed 'xxx') can be either negative or positive. This could possibly be a new question rather than a continuation of this question? Check for duplicates first though!
– andrew.46
May 21 '18 at 21:21
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
One excellent option is to use ImageMagick's -brightness-contrast option in combination with a bash for loop.
To see how it all works first find a test image and experiment with the following syntax:
convert -brightness-contrast 10x5 input.jpg output.jpg
The -brightness-contrast option has 2 elements:
-brightness. In the example above this has been set at 10 and possible settings are from -100 to +100. Positive values increase the brightness while negative values decrease the brightness. Using a '0' value means that the brightness will remain unchanged.
-contrast. In the example above this has been set at 5 and again possible settings are from -100 to +100. Positive values increase the contrast while negative values decrease the contrast. Using a '0' value means that the contrast will remain unchanged.
Once you have found the settings best for your image you can navigate to the folder holding your images and run a for loop:
for j in *.jpg
do
convert -brightness-contrast 10x5 "$j" altered_"$j"
done
Here you can see I have made a small naming alteration for the output file which you can of course tailor to your specific needs.
There are many different ways to accomplish your goal with ImageMagick but this would be my own choice as it is the easiest to use and to understand :).
References:
ImageMagick -brightness-contrast: All of the details on this command from the ImageMagick web site.
answered May 19 '18 at 4:46
andrew.46andrew.46
22.5k1471150
Is there a command which would allow me to rotate images by degrees? Such as 5 degrees left or 3 degrees right?
– Ron Piggott
May 21 '18 at 20:47
@RonPiggott Indeed there is :). Trying experimenting withconvert -rotate xxxcommand. I have not ever used this but I beieve the integer (where I have placed 'xxx') can be either negative or positive. This could possibly be a new question rather than a continuation of this question? Check for duplicates first though!
– andrew.46
May 21 '18 at 21:21
add a comment |
One excellent option is to use ImageMagick's -brightness-contrast option in combination with a bash for loop.
To see how it all works first find a test image and experiment with the following syntax:
convert -brightness-contrast 10x5 input.jpg output.jpg
The -brightness-contrast option has 2 elements:
-brightness. In the example above this has been set at 10 and possible settings are from -100 to +100. Positive values increase the brightness while negative values decrease the brightness. Using a '0' value means that the brightness will remain unchanged.
-contrast. In the example above this has been set at 5 and again possible settings are from -100 to +100. Positive values increase the contrast while negative values decrease the contrast. Using a '0' value means that the contrast will remain unchanged.
Once you have found the settings best for your image you can navigate to the folder holding your images and run a for loop:
for j in *.jpg
do
convert -brightness-contrast 10x5 "$j" altered_"$j"
done
Here you can see I have made a small naming alteration for the output file which you can of course tailor to your specific needs.
There are many different ways to accomplish your goal with ImageMagick but this would be my own choice as it is the easiest to use and to understand :).
References:
ImageMagick -brightness-contrast: All of the details on this command from the ImageMagick web site.
answered May 19 '18 at 4:46
andrew.46andrew.46
22.5k1471150
Is there a command which would allow me to rotate images by degrees? Such as 5 degrees left or 3 degrees right?
– Ron Piggott
May 21 '18 at 20:47
@RonPiggott Indeed there is :). Trying experimenting withconvert -rotate xxxcommand. I have not ever used this but I beieve the integer (where I have placed 'xxx') can be either negative or positive. This could possibly be a new question rather than a continuation of this question? Check for duplicates first though!
– andrew.46
May 21 '18 at 21:21
add a comment |
One excellent option is to use ImageMagick's -brightness-contrast option in combination with a bash for loop.
To see how it all works first find a test image and experiment with the following syntax:
convert -brightness-contrast 10x5 input.jpg output.jpg
The -brightness-contrast option has 2 elements:
-brightness. In the example above this has been set at 10 and possible settings are from -100 to +100. Positive values increase the brightness while negative values decrease the brightness. Using a '0' value means that the brightness will remain unchanged.
-contrast. In the example above this has been set at 5 and again possible settings are from -100 to +100. Positive values increase the contrast while negative values decrease the contrast. Using a '0' value means that the contrast will remain unchanged.
Once you have found the settings best for your image you can navigate to the folder holding your images and run a for loop:
for j in *.jpg
do
convert -brightness-contrast 10x5 "$j" altered_"$j"
done
Here you can see I have made a small naming alteration for the output file which you can of course tailor to your specific needs.
There are many different ways to accomplish your goal with ImageMagick but this would be my own choice as it is the easiest to use and to understand :).
References:
ImageMagick -brightness-contrast: All of the details on this command from the ImageMagick web site.
answered May 19 '18 at 4:46
andrew.46andrew.46
22.5k1471150
One excellent option is to use ImageMagick's -brightness-contrast option in combination with a bash for loop.
To see how it all works first find a test image and experiment with the following syntax:
convert -brightness-contrast 10x5 input.jpg output.jpg
The -brightness-contrast option has 2 elements:
-brightness. In the example above this has been set at 10 and possible settings are from -100 to +100. Positive values increase the brightness while negative values decrease the brightness. Using a '0' value means that the brightness will remain unchanged.
-contrast. In the example above this has been set at 5 and again possible settings are from -100 to +100. Positive values increase the contrast while negative values decrease the contrast. Using a '0' value means that the contrast will remain unchanged.
Once you have found the settings best for your image you can navigate to the folder holding your images and run a for loop:
for j in *.jpg
do
convert -brightness-contrast 10x5 "$j" altered_"$j"
done
Here you can see I have made a small naming alteration for the output file which you can of course tailor to your specific needs.
There are many different ways to accomplish your goal with ImageMagick but this would be my own choice as it is the easiest to use and to understand :).
References:
ImageMagick -brightness-contrast: All of the details on this command from the ImageMagick web site.
answered May 19 '18 at 4:46
andrew.46andrew.46
22.5k1471150
answered May 19 '18 at 4:46
andrew.46andrew.46
22.5k1471150
answered May 19 '18 at 4:46
andrew.46andrew.46
22.5k1471150
answered May 19 '18 at 4:46
andrew.46andrew.46
22.5k1471150
22.5k1471150
Is there a command which would allow me to rotate images by degrees? Such as 5 degrees left or 3 degrees right?
– Ron Piggott
May 21 '18 at 20:47
@RonPiggott Indeed there is :). Trying experimenting withconvert -rotate xxxcommand. I have not ever used this but I beieve the integer (where I have placed 'xxx') can be either negative or positive. This could possibly be a new question rather than a continuation of this question? Check for duplicates first though!
– andrew.46
May 21 '18 at 21:21
add a comment |
Is there a command which would allow me to rotate images by degrees? Such as 5 degrees left or 3 degrees right?
– Ron Piggott
May 21 '18 at 20:47
@RonPiggott Indeed there is :). Trying experimenting withconvert -rotate xxxcommand. I have not ever used this but I beieve the integer (where I have placed 'xxx') can be either negative or positive. This could possibly be a new question rather than a continuation of this question? Check for duplicates first though!
– andrew.46
May 21 '18 at 21:21
Is there a command which would allow me to rotate images by degrees? Such as 5 degrees left or 3 degrees right?
– Ron Piggott
May 21 '18 at 20:47
Is there a command which would allow me to rotate images by degrees? Such as 5 degrees left or 3 degrees right?
– Ron Piggott
May 21 '18 at 20:47
@RonPiggott Indeed there is :). Trying experimenting with
convert -rotate xxx command. I have not ever used this but I beieve the integer (where I have placed 'xxx') can be either negative or positive. This could possibly be a new question rather than a continuation of this question? Check for duplicates first though!– andrew.46
May 21 '18 at 21:21
@RonPiggott Indeed there is :). Trying experimenting with
convert -rotate xxx command. I have not ever used this but I beieve the integer (where I have placed 'xxx') can be either negative or positive. This could possibly be a new question rather than a continuation of this question? Check for duplicates first though!– andrew.46
May 21 '18 at 21:21
add a comment |
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I suspect you might be after the
-brightness-contrastof imagemagick combined with aforloop. Some details here: imagemagick.org/script/… Let me know if this is something like what you are after?– andrew.46
May 17 '18 at 7:06
@andrew.46 Yes this is what I am wanting to do. Perhaps a reduction by 10
– Ron Piggott
May 19 '18 at 4:01