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Questions tagged [watermark]

A watermark is information embedded within a file. In the most common usage, watermarks are added to images to identify the image's creator.

Digital watermarks may be used to verify the authenticity or integrity of the carrier signal or to show the identity of its owners. It is prominently used for tracing copyright infringements and for banknote authentication.

Like traditional watermarks, digital watermarks are only perceptible under certain conditions, i.e. after using some algorithm, and imperceptible anytime else.

In contrast to a , watermarks can typically easily be added by a third party. A watermark can be forged, but should typically be hard to remove.

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Best way to stamp an image with another image to create a watermark in ASP.NET?

Anyone know? Want to be able to on the fly stamp an image with another image as a watermark, also to do large batches. Any type of existing library or a technique you know of would be great.
MetaGuru
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Adding Image watermark to Pdf while Creating it using iTextSharp

Wonder if this possible. Saw many posts on adding watermark after the pdf is created and saved in disk. But during creation of document how do i add a image watermark. I know how to add a image to document. But how do i position it such that it…
Deeptechtons
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Adding an invisible image watermark in C#?

I want to insert multiple invisible watermarks into my JPEG pictures through C# code. That means that I need a .NET library that does this work and not some external batch application. Any suggestions?
Tonči D.
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Create a watermark (pdf Optional Content) that shows only when printing using PDFBox

I have come across many examples that use the PDFBox Layer Utility's appendFormAsLayer method as shown below: /** * Places the given form over the existing content of the indicated page (like an overlay). * The form is enveloped in a marked…
Scott G
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jQuery watermark that stays when focused

I have some s on my form, and I would like to watermark them with field labels. There are already myriad watermarking plugins, but best as I can tell they all clear the watermark when the is focused, even if there's nothing…
Tim Sullivan
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Android Video Watermark, W/O Server?

I have been looking for a way to add a watermark, be it image or text, on a video. Something like "Property of XYZ", or how many seconds it's been since the video started recording "2:45." on the bottom right. So far, I have only found solutions…
Lucas Camargo de Carvalho
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WPF Watermark PasswordBox from Watermark TextBox

I am using a Watermark textbox as in Watermark TextBox in WPF
Sauron
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Combine two PNG transparent images

I'm trying to create a function to resize transparent PNG images and adding a transparent PNG watermark to them. I have tried to place imagealphablending($image_p, false); and imagesavealpha($image_p,true); everywhere, but it it makes black…
ivop
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ModelMetadata.Watermark and MVC View Models

I'm struggling to display a watermark (so called placeholder) on my MVC3 form inputs. There is already few posts down here talking including the quite focused one here: Html5 Placeholders with .NET MVC 3 Razor EditorFor extension? In these posts,…
user1288337
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jQuery Watermarked input and validation

On a HTML page I have an inputbox that has a 'watermark' on it when it is empty. (eg: "enter text here..."). Kind of like this: http://digitalbush.com/projects/watermark-input-plugin/ - but custom written. The problem is that I can't figure out how…
andreialecu
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How do I repeat a watermark image with GD and PHP?

I've created a script that adds a watermark on top of an existing image using PHP. That works all good. I am able to position it on the top left, bottom left, top right, bottom right and centered. I haven't been able to figure out how to repeat the…
Ronnie
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Reporting Services 2005 - How to embed a watermark?

In one of our systems that uses Reporting Services 2005, the client is asking for reports to feature a watermark to ensure that reports which are printed out by the customer and sent in (example: A contract document generated by the system but then…
TheTXI
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Removing watermark from an image using bbox parameters

I am using a Computer Vision cloud service to detect watermarks on a set of images. The cloud service returns the location of the watermark in form of Bounding Box (bbox). For example, one output looked like this: "text": "Watermarked Text", …
George Chalhoub
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Secure streaming video with dynamic watermark

What are some scalable and secure ways to provide a streaming video to a recipient with their name overlayed as a watermark?
Brian Gates
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How to save float64 image data without loss of information, while being able to visualize it

I'm trying to implement frequency spectrum image watermarking, using the Fast Fourier Transform and everything is working perfectly, except the fact that I can't save the resulting watermarked image without running into trouble. Since the…
Bogdan Kandra
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