resize image client side before upload javascript

We are using HTML 5 technologies for the minimizing such as FileReader and Canvas. However, the special thing about the size reduction is that the resizing is taking place directly and without additional software in the browser of the user on the client-side instead of by means of some server-side PHP script so that the server resources are spared. Because we are building up on ] code, updated configuration should look something like this: var uploader = new plupload.In this tutorial I would like to show you how to implement an image upload script in which the image is resized or minimized automatically. To enable resizing on the client-side we need to pass in resize option with new width and height (obviously resize is not the best name for the option, since currently we can only downsize).

preserve_headers - whether to preserve JPEG meta headers (PNGs are not affected), e.g.: Exif, Gps, IPTC, etc (default true).

quality - quality of resulting JPEG (PNGs are not affected) (default 90).

crop - whether to crop the image to the exact dimensions, rather than resize proportionally (default false).

height - if image is higher, it will be resized (if not specified original image height will be used).

width - if image is wider, it will be resized (if not specified, original image width will be used).

Resize option is a compound object with some sub-options: Lets build up on the code that we wrote for ]. We are planning to adapt a bilinear interpolation algorithm in the nearest releases. Currently it is not suitable for generating high-quality images (see #707), because it is using a default algorithm (apparently a so called nearest neighbor interpolation) for resizing. Might be very handy, when image is uploaded only to become a tiny avatar, etc. Plupload supports manipulating images (JPEGs and PNGs) on client-side, which includes downsizing them, dropping their quality (for JPEGs only) and stripping off the meta headers (for JPEGs only as well) - all to make them smaller in size and save the bandwidth.

Resize image client side before upload javascript