Settings: Media Manager

Overview

You can modify the upload image processing settings at any time. There are options for specific e-book format cover images, and general document images. The adjustments are global so any changes will affect all subsequent images uploaded.

All image upload operations generate two thumbnails, 100px and 300px on the long side. This is fixed in the system and cannot be changed.

You can adjust the global print and online(reader) image resizing.

The Image Upload and Storage Options

Images and rich media can be stored under different tabs. This allows some organization of different types of images and media.

Covers

Icons

Images

Logos

Rich Media

Screen Grabs

Images which by their nature are low resolution and

Image Settings

You can configure how images are processed for each tab context to generate optimum print and Online images. The processing options are: 

1. Filename. This should not be changed.
2. Width. You can specify width OR height if you are using Aspect ratio resizing.
3. Height. You can specify Hieght OR Width if you are using Aspect ration resizing.
4. Resize. There are three options: No Resize, Maintain Aspect Ratio, Resolution.
5. Format. These are the generated formats. You can select JPG, PNG or GIF only. This is only applied if the file you are uploading is a TIFF.
6. Resolution. This defaults to W3C internet resolution of 96dpi. You can change it if required but that is unlikely. This value is used in resolution resizing.
7. Compression. When uploading a JPG or converting to a JPG, this provided the default compression. 0 is no compression. An ideal compression value is 15.

What it all means

You can specify the generated online image to be resized to a width or height rule, by resolution recalculation or nothing happens.

Dimension Resizing

You can resize an image to a fixed height or width. If an image is smaller in pixels than the value set it will not be resized.

No Resize

When you upload the image it is not resized but the resolution is changed  to the resolution setting. This is useful for screengrabs and similar images which are low resolution to begin with. The recommended resolution is 96dpi (Internet resolution) and not 72dpi which is an arbitrary print resolution based on points.

Resolution Resizing

Resolution Resizing takes the resolution you have set and divides it by the uploaded image resolution. This figure is the scaling factor. The image is then resized using that scaling factor and the set resolution applied. Here is an example:

1. You have set resolution to 96dpi.
2. You are uploading an image that is 5in x 4in at 300dpi or 1500px x 1200px.
3. The computed scaling factor is 96/300 = 0.32.
4. The image is then resized to 480px x 384px at 96dpi.
5. The result is an image that looks the same size (more or less) on screen as it does on a printed page.