how can I convert almost all images from jpg format to webP format if they are already on the server?
I used the command
magick convert. * jpg .webp
but I don't think it's ok because it would create images over them. How should we proceed as correctly as possible so as not to duplicate the images?
Is there an easier way to do this since I have all the images on the server?
Related
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
I am trying to create a PDF file using Latex. However, Latex does not handle TIFF or any other image format capable of both transparency and CMYK. The only solution I think I can use is to convert the PNG image to PDF and embed those in the file.
I am somewhat familiar with imagemagick, however, I am having trouble figuring out how to convert a PNG (probably in the RGB/SRGB colour space) to a PDF in the CMYK colour space.
How do I go about doing this conversion so that the colours are correct and the transparency remains?
In Imagemagick, you should use a CMYK type profile to do the conversion:
convert input.png -profile USWebCoatedSWOP.icc output.pdf
Note, however, that Imagemagick will simply put the raster image into a vector PDF shell. It will not vectorize the image.
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.
I'm checking my website with Google PageSpeed and I have the following warning :
Losslessly compressing image.png could save 802B (31% reduction).
This png file is uploaded on my Rails website with carrierwave. When the image is uploaded, I run the equivalent of convert -strip -quality 100 -resize "90x90^" -gravity center -extent 90x90 image.png final_image.png
But it's not enough for Google.
What do I miss ?
Thank you!
Please see PageSpeed documentation https://developers.google.com/speed/docs/insights/OptimizeImages:
Recommendations
You should perform both basic and advanced optimization on all images.
Basic optimization includes cropping unnecessary space, reducing color
depth to the lowest acceptable level, removing image comments, and
saving the image to an appropriate format. You can perform basic
optimization with any image editing program, such as GIMP. Advanced
optimization involves further (lossless) compression of JPEG and PNG
files.
Use an image compressor
Several tools are available that perform further, lossless compression
on JPEG and PNG files, with no effect on image quality. For JPEG, we
recommend jpegtran or jpegoptim (available on Linux only;
run with the --strip-all option). For PNG, we recommend OptiPNG
or PNGOUT.
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;