Is it possible to do with imagemagick and if so what would be the command?
so far i've tried to split the tiff with
convert a.tif -scene 1 a%d.tif
but the resulting image has all layers.
Please advise, thanks!
Related
I executed below command to convert a .tif file to a .jpg file. But for some tif images it generates 3 jpg files when only one file is expected. One is the expected jpg file, one is the same image in a black background and the other is just a white image.
magick convert /<.tif image name> -intent relative -resize 1500x1500> -quality 95 -colorspace sRGB -strip -auto-orient /<output .jpg image name>
Does anyone know the reason for this? what property of the input file causing this? or is there a issue with the command?
magick convert /<.tif image> -intent relative -resize 1500x1500> -quality 95 -colorspace sRGB -strip -auto-orient /<output .jpg image>
Expect this to give a single jpg image. But it gives 3 images for some input .tif images
Just adding some meat to #GeeMack's comment...
TIFF files often contain multiple images - or IFDs as referred to in the documentation. These can represent many things, but the most common are:
a low-resolution, flattened preview image followed by a full-resolution image aimed at providing quick previews
multiple pages of longer documents
colour separations for printing
the many channels of multi/hyper-spectral images
the layers of a multi-layer images, e.g. Photoshop editing layers
images and their associated masks, or classes/categories/classifications
... and so on.
A quick way to check what you have is with ImageMagick's identify command as that will produce a line for each image in the file, and you can often tell by the sizes, shapes and types of the layers which is a small preview and which is high resolution image, or that there are 242 channels of identical resolution images for a EO-1 hyperspectral imager.
magick identify IMAGE.TIF
Here's an example:
magick identify Prokudin-Gorskii.tif
Prokudin-Gorskii.tif[0] TIFF 3702x3205 3702x3205+0+0 16-bit sRGB 134.955MiB 0.060u 0:00.064
Prokudin-Gorskii.tif[1] TIFF 3702x3205 3702x3205+0+0 16-bit sRGB 134.955MiB 0.000u 0:00.001
Prokudin-Gorskii.tif[2] TIFF 625x175 625x175+841+814 16-bit sRGB 134.955MiB 0.000u 0:00.001
and you can see from the sizes that there are two full layers followed by a reduced size layer that is only annotation or markup on a small area of the image.
Another useful technique is to lay out all the images within a TIFF beside each other in a row across the page, with 10 pixel gaps between, using a command like this:
magick IMAGE.TIFF +smush 10 contents.jpg
We can now see that the three layers in the foregoing image correspond to a flattened version of all the layers on the left, followed by the two individual layers themselves in the centre and the reduced size yellow line overlay layer on the right.
If we then determine that it is only the first, flattened image we are interested in, we can extract and manipulate that alone by adding its sequence number in square brackets afterwards. So, to extract just the first flattened image:
magick IMAGE.TIF[0] extracted.tif
You can also extract multiple individual images and ranges, using commas and dashes.
Note also that magick convert is generally not what you want.
Note also that exiftool is lighter weight than a full ImageMagick installation and can also tell you what's in a multi-IFD TIFF.
I want to get the raw binary data of an image but I don't know how to do that. Is any module available there to do that? I need some help. If anyone knows the solution to this help me.
The easiest way is probably just with ImageMagick in your Terminal. Say you have a JPEG and want the RGB pixel values in binary without headers or anything:
magick INPUT.JPG -depth 8 RGB:output.bin
Or you have a PNG and want RGBA data:
magick INPUT.PNG -depth 8 RGBA:output.bin
Can I use multiple variations of the below Imagemagick command to achieve the to convert a psd to png, jpg and pdf with rgb and cmyk settings
convert -colorspace rgb/cmyk original.psd convert.png/jpg/pdf
I am a newbie trying to play with file formats and I also want to convert the output files based on RGB and CMYK.
Any help would be greatly appreciated.
Is there anyway to process an image like this with ImageMagick so that I can use tesseract-ocr to convert it to text?
Because of the lines in the background I get nonsense from conventional methods. Does anyone know how to deal with an image such as this?
'convert -density 300 -units PixelsPerInch -type Grayscale +compress input.png input.tif' followed by 'tesseract input.tif output -l eng' gives me utter garbage.
Or are there any alternatives to ImageMagick that I can use to pre-process such an image whether through command-line or in python?
Have you tried morphology operations Morphology of Shapes after converting image to grayscale?
Our print team saves raster images as .eps files. We need to convert about 11000 .eps to .jpg. We are using ImageMagick (with Ghostprint) on Linux. The conversion occurs but the resulting .jpg is not the same size as the source .eps - It's about 1/2 the size. Probably a problem converting a vector to a raster. Any way to solve this?
Your using the default resolution (72dpi). use the -density option to specify a dpi to convert.
convert -density 300 /path/to/file.eps -flatten /path/to/file/.jpg;