In my application I am using WriteableBitmapRenderExtensions.Render() method present in WinRT XAML toolkit for rendering xaml element. After rendering the xaml control I need to send this to server in the form of Base64 string. How I can convert this WritableBitmap class in to Base64 string?
Save the WriteableBitmap to a png or jpg (there's an extension for that in the toolkit that you can probably modify to get the compressed image as byte array) to reduce the data size and then use Convert.ToBase64String() as Chris suggested to convert the bytes to Base64 string.
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My web page has a document viewer (canvas) where I will bind a multi-page tif file stream.
There is a functionality to delete pages from the file, I am using the ABCpdf library to convert the tif file stream to a pdf stream and delete a particular page. But I don't see any way to convert back the pdf stream to a tif stream.
Please help.
You want the GetData() method, called as GetData("foo.tif"). The filename passes is ignored except that its extension is checked to see what format to use. The return value is an array of Byte.
https://www.websupergoo.com/helppdfnet/default.htm?page=source%2F5-abcpdf%2Fxrendering%2F1-methods%2Fgetdata.htm
I need to convert the screenshot of the front panel of the application into a Base64 string to post it to a web API. The block diagram is:
I used a "base64_fast_encode" utility vi from the link
https://forums.ni.com/t5/Example-Programs/Fast-Base64-Encoder-Decoder-using-LabVIEW/ta-p/3503281
Please find the encoded base64 string file from the link:
https://fil.email/WFBxwWyr
I pasted the resultant encoded base64 string in the below website:
https://codebeautify.org/base64-to-image-converter#
And I observed that it is not decoded back to image.
Please suggest if there are any other utility vis to convert to base64. If not, suggest an alternative of doing it.
Thanks in advance.
What you are missing is converting the LabVIEW image data to a more generic image format that would be understood outside of the context of LabVIEW, such as by the CodeBeautify tool. All you need to do is convert Image Data using LV Image to PNG Data.VI to PNG before you encode it.
Using the below example, if I take the base64 encoded string output and use the CodeBeautify base64-to-image-converter tool, it does show the expected image.
I'm trying to convert a pdf figure to svg so I can edit some details with Inkscape. The problem I have is that the import changes slightly through some sort of smoothing.
In particular, this is the original figure:
And this is the figure after converting to SVG
This is the output of pdf2svg, which is exactly the same I get if I use Inkscape directly.
I attach a link where you can get both files.
https://www.dropbox.com/s/domxcc8pncyouy6/images.tar.gz?dl=0
Do you know a workaround to this issue?
Without seeing the SVG it is hard to tell for sure. However it looks like the "heat map" portion of your PDF/SVG may be a low resolution bitmap that is being enlarged in the page.
By default, SVG renderers will use interpolation when enlarging an image. This gives the image a smoothed/blurry look at large scales.
You could try locating the <image> element in your SVG and adding the attribute image-rendering="pixelated" to the <image> tag. Some browsers support that option and will scale the image using the nearest-neighbour scaling method.
Otherwise you may need to extract the image from the PDF or SVG; resample it at a higher (eg. 4x or 8x) resolution; then reinsert it back into the file.
Find the image in the SVG file (<image id="image5" .../>
Extract the Base64 encoded image from the DataURI. And decode it using a Base64 decoder.
Multiply the image resolution using an editor, cusch as Photoshop or Gimp.
Encode the file back to Base64
Update that <image> element with the new Base64.
I have just finished importing my images into opencart. I now noticed that OpenCart doesn't handle PNG graphics properly as it uses a static rate for compression which works fairly well for JPG but ends up losslessly compressing PNG which isn't so great.
I have now converted the png images to Jpeg, but im wondering if the its possible to replace the image name using MySql.
Is there any way to replace the image link for URL.
update TABLE_NAME set FIELD_NAME = replace(FIELD_NAME, ‘find this string’, ‘replace found string with this string’);
I am getting back a image from SQL server as a byte[]. Can I use xsl transform to convert it into an actual image for a webpage? How, may I do so if this is possible?
Ok, so I got around via a recomendation by my coworker using:
return File(myImage.ImageBinary, "image/gif");
Your question is not clear. I can't see a relation between an image and an XSL transformation. Are you using an SVG image?
If you are storing something like a JPEG image, you could create an ASP.NET Handler that fetches that from DB as a byte[] and use Response.BinaryWrite method to stream that to the client.