Having problem with image magick cant convert chinese name from textfield of pdf.
Is there anyone know how to deal with this?
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It seems that ghostscript uses different device for PNG24 and grayscale.
Is there a way to convert an EPS file to PNG24 format that is grayscale?
We are currently converting TIFF files to PDF using GraphicsMagick. The TIFF is coming from an eFAX and has a (pixel) resolution of 1728x2200.
If you do the conversion with tiff2pdf or just open it on Preview and convert export it to PDF, it is generated with a MediaBox value of 612x792 point, which is what is expected.
However graphics magick generates a MediaBox of 1728x4400 and a CropBox of 610x792. It all looks good if you open it on a PDF viewer because it's using the CropBox but if you're feeding it to GhostScript after, you don't get the Image on the full page but as a small square inside the document.
The lazy solutions would be to change for Tiff2PDF or add -dUseCropBox to our GhostScript command but I'd like to know what GraphicsMagick option should be used to have the PDF with the good MediaBox. It's like it doesn't understand that the resolution is in Pixels and not in Point. Hope somebody has insights
As we all know that jpg image format does not support transparency.
so we use .png format.
i was surfing on net and i found an image with .jpg format and
transparent. it is wonder how a jpg format image can be transparent.
here is the example image.
http://bdthemes.net/demo/joomla/intensy/images/sampledata/features/top_b.jpg
The provided example image is in fact not a JPEG, but a png file.
It has the extension and mime-type of a jpeg file, but it's contents are in png format.
JPEG file format does not support transparacy.
So if you need transparancy in images for use in browsers.
You can either:
convert the image to png, this works in all browsers
use ZorroSVG, requires SVG support but results in smaller files for photographic images.
use webp, only use when you have fallbacks in place for browsers that do not support webp.
The new JPEG-XR standard supports transparency.
However, this is not a real JPG, it's a PNG. If you rename it to .txt, you can see that the contents of the file start with PNG:
check its mime type, it must be renamed .png to .jpg
First I'll start with my assumptions about thumbnail:
Thumbnail is the same image reduced by size so it is smaller in size and faster to load
In Exif data there is referance to Thumbnail Image so it might be part of the jpg file
Now what I think is that theoretically I can "inject" to a jpg file another thumbnail so that in windows i will see a small picture and when I will open the file I will see other picture
And my question is in guidlines how do I do that?
Thanks!
Some JPEG file format support including a thumbnail as part of the image header. In the JFIF format, the thumbnail can be either an RGB bitmap or a nested JPEG stream.
You need a JPEG encoder that will insert a thumbnail into the JPEG header. It's that simple. ImageMagic will do it. Many other JPEG encoders will do it as well.
Need to convert pdf file to image file (jpg, png, gif) to show on the web.
Exploring goole application to that reads PDF files shows that they are using PNG. But hov to onvert 2000x2000 file so it have only 150 kb?
Is there any command line tool?
PNG and GIF are better than JPEG, GIF probably better than PNG. TIFF usually is the best.