![]() Watermark text color can also be configured, together with the font used for the text. One can change the transparency of the watermark, making the text more or less opaque. ![]() Step 4: Change text color, transparency and font familyĬlick on the text watermark to reveal its associated menu. Step 3: Change text size, rotation and location on pageĬlick and drag the text watermark to change the location on the PDF pageĭrag the rotation handle to rotate the text watermark.Ĭlick and drag the resize handles found on the sides to change font size. Type 'Draft' or 'Classified' to try it out. You should see a text watermark being added.Ĭlick on it to edit the text. Step 2: Add Text WatermarkĬlick the Add Text button at the top of the PDF page. You can pick PDF files from Dropbox or Google Drive too.Įxpand the 'Upload' dropdown and select your files. Same features as the online service, and the files never leave your computer.Ĭlick 'Upload' and select files from your local computer.ĭragging and dropping files to the page also works. Rather not upload your files and work with them offline? After processing, they are permanently deleted. Step 1: Select your PDF document Upload your filesįiles are safely uploaded over an encrypted connection. Works on all desktop platforms including Mac. Please upgrade to continue processing this document.įree users are limited to 50 pages per conversion.įree users are limited to 5 files per Rename task.īelow we show how to add text watermark to PDF documents online, for free. Please upgrade to continue processing up to 100 links at once.įree users are limited to 10 pages per OCR task. Please upgrade to continue processing multiple files at once.įree users are limited to 20 pages per conversion.įree users are limited to 20 links per task. You will see a red circle at the bottom of the Actions panel. For example, it can be Watermark or Logo Watermark. 2.In the Actions panel, click on the little plus icon to create a new action. You reached your free limit of 5MB per image file.įree users are limited to a single file per task. If you don’t see it, click on Window > Actions. You reached your free limit of 50 MB per file. Please upgrade to continue processing this task or break for 00:59:00. You reached your free limit of 3 tasks per hour. Please upgrade to continue processing this task. You reached your free limit of 30 files per hour. ![]() Consequently, the contrast feature (CF) model is applied to each decomposed LDR image then, the three saliency maps are integrated into a single map.Too many attempts. The salience map is produced by decomposing a specific HDR image into three LDR images with various intensity levels using a tone-mapping operator. Afterward, an HDR image saliency is created to identify the most significant locations that can be used to securely embed data to achieve a balance between visual quality and watermark strength. Considering that out of the three feature maps, the first one represents the most significant part of the information in the HDR image, it was selected due to its robustness in terms of watermark insertion. In the first step, three feature maps were produced and split into three color components (RGB) using the host image. An adaptive approach for concealing watermarks based on visual saliency and Tucker decomposition has been presented in this article. On the other hand, TM can be regarded as an inevitable attack when protecting HDR image ownership is considered. The need for pre-processing of the HDR image format with tone mapping (TM) operators makes it unique the TM operators are provided on display with a low dynamic range (LDR). Recently, great attention has been paid to high dynamic range (HDR) images because of their richly detailed and high dynamic range of intensity.
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