How-to automatically identify similar images using pHash

Feb 19, 2015 by Nadav Soferman

pHash for image similarity detection Photos today can be easily edited by means of resizing, cropping, adjusting the contrast, or changing an image’s format. As a result, new images are created that are similar to the original ones. Websites, web applications and mobile apps that allow user generated content uploads can benefit from identifying similar images.

If your site allows users to upload images, they can also upload various processed or manipulated versions of the same image. As described above, while the versions are not exactly identical, they are quite similar.

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Instantly view semantic image data with a cloud-based media library

Feb 05, 2015 by Amit Sharon

Semantic image metadata Cloudinary offers you a comprehensive online interface that allows you to arrange and manage your image assets. With Cloudinary’s Media Library, you can easily view, upload, moderate, and search through your images. We recently enhanced this web interface with a new feature that allows you to instantly view semantic image data (descriptive image metadata), that is automatically extracted from your images.

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How to automatically tag and categorize photos according to their content

Jan 05, 2015 by Nadav Soferman

ReKognition scene categorization Drawing insights from user generated content can be very useful. If you allow users to upload images, you might want to better understand what their images contain. Whether a photo is of a landscape, people, animals, or nightlife, image processing and analysis can assist in further comprehension.

Cloudinary takes care of the entire image management pipeline, from uploading, via dynamic image manipulation, to fast CDN delivery. You can use Cloudinary with our add-on for automatic scene categorization provided by ReKognition, a visual recognition solution developed by Orbe.us.

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Introducing a complete and modern UI widget for cloud based image uploading

Cloudinary's upload widget Many websites and mobile applications support user uploaded images and other files. This requires a service to receive and process the uploads, store them safely, manipulate them to match the website or app’s design, and deliver them to your users. This also requires a user interface within your site or app that allows users to easily upload images.  

At Cloudinary, we have been taking care of the entire image management pipeline from the time our service was launched: from an upload API, to cloud storage via our rich set of image manipulation capabilities, to optimized CDN delivery.

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How-to generate thumbnails for Office documents using Cloudinary and Aspose

Nov 13, 2014 by Nadav Soferman

Many websites and mobile applications with user generated content allow you to upload all kinds of files. Images, PDFs, and Microsoft Office files, such as Word, Excel, and PowerPoint are all common types of uploads.

Web or mobile developers may want to build   applications that allow users to download PDFs, support document previews, or embed image thumbnails of Office files. However, implementing these types of capabilities can be quite a challenging task.

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JPEG-XR conversion with auto browser detection, optimize images for IE users

JPEG-XR Post Sites and apps are including more and more high-quality images. The more you can compress images to reduce their size in bytes, the smaller your bandwidth, the faster your site will load and the happier your users will be. But when compressing images, you need to make sure you maintain high visual quality.

Most web sites and mobile apps use the popular JPEG format to display their images and user uploaded photos. The JPEG format has efficient built-in compression that reduces image size while maintaining a reasonable visual quality. But you can reach much better results using more modern image file formats.

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Reduce size of animated GIFs, automatically convert to WebM and MP4

Animated GIF to WebM and MP4

Short animated GIF-based video sequences seem to be spreading like wildfire around the web.

Media and news sites display short video segments, social apps allow their users to share animated GIFs with their friends, and while the dated animated GIF format is very useful for this purpose, it has one significant disadvantage - its huge file size.

Animated GIFs are not optimized for captured videos, resulting in large files, heavy bandwidth utilization, slow loading times, and sub-optimal user experience. Also, resizing and manipulating animated GIFs to match the graphic design of your site or app might be a lengthy, cpu-intensive process, as it consists of dozens or even hundreds of frames being manipulated individually.

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How to automatically adapt website images to Retina and HiDPI devices

Jul 24, 2014 by Nadav Soferman

DPR Post Web development was much simpler only a few years ago, when we were building HTML pages that included images and photos, and all elements shared the same resolution units. If for example, you aimed at a standard 1024x768 screen, you knew these were exactly the number of pixels available for displaying HTML elements and images.

In 2010, Apple introduced the iPhone 4 with Retina display. In order to simplify things for developers, the logical screen resolution remained the same as previous iPhone models (640x960) while the physical screen resolution was exactly doubled (1280x1920). This means that if, for example, you embed an image tag in your HTML page with width of 200 pixels and height of 300 pixels, and you display a double-size image of 400x600 pixels, the Retina display shows all pixels of the larger image, resulting in a much clearer visual result and without performing browser-side down-scaling.

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Automatic image moderation, removing adult or inappropriate photos using WebPurify and Cloudinary

Jul 22, 2014 by Nadav Soferman

WebPurify moderation add-on If your web or mobile application involves user-generated content, you may encounter users who upload inappropriate photos or images to your application. These could be images which offend other users - adult content, violent photos, etc. - or images which cause your site to violate laws or regulations.

There are two ways to identify and remove such images: you can either require approval of each image before it is displayed to your users, or display images immediately after upload, and then quickly remove them from your site as soon as a moderator has found them to be inappropriate.

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Direct upload made easy, from browser or mobile app to the cloud

Jul 16, 2014 by Nadav Soferman

Unsigned upload Handling user uploaded images on your website can be a time consuming task. In this post, we'll show how Cloudinary's cloud-based image management service can help you turn user uploading into a lightweight operation that bypasses your servers altogether.

How do you handle user uploads today? If images are uploaded directly to your servers, this requires some heavy server-side processing, bandwidth and storage space. One way to offload images is to transfer them to cloud storage. But if you're handling the upload operation on your own servers (and then transferring them to the cloud), this is still wasteful of server resources.

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