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In Brief
Resizer is a batch/bulk processor of images that can rotate and resize/crop a large number of images without user interaction and output the results as new images in the original or specified format in a specified folder. It can also be used to convert between common image formats. It is not suitable for handling very large images but has no limits on the number of images it can process.

General Usage
You can in theory use the software without a mouse, by using the tab button to get you to your required button to press. You cannot carry out some operations such as moving the window this way, though some windows shortcuts are recognised, for example, closing a window using Alt-F4. However, the software was not intended to be used in this way.

Folder in
This is the source folder for the image processing that you are carrying out. Put all the images you would like to have processed here bearing in mind that not all image file formats are understood by Resizer.

Some file formats which Resizer can output cannot be read. These include EPS and PDF. There are also file formats which appear in a variety of protocols where Resizer may faill to read. Some BMPs for example use compression algorithms that Resizer does not understand. The TIFF format which is a shell for other formats is susceptible to such issues since it can hold formats which are not supported by Resizer. WIth the following formats, Resizer will make an attempt to read and if this fails, it will simply move onto the next file. After the operation is complete Resizer will give an error report with a brief explanation of why it failed to read a format.

The input/read formats which are supported are:

BMP
GIF
JPEG/JPG
PNG
PPM
PGM
PBM
TIFF/TIF

Resizer will assume that the extensions above indicate the file formats so your file MUST have these extensions. Files and extensions may be lowercase or uppercase.

Folder Out
This is the destination folder where you would like Resizer to place the images resulting from the processing. Resizer will create a new folder for each job, and name it using the date and time at which the job is started. All output files are placed inside this folder which is itself in the Folder Out that you have specified.

File Formats
Resizer can output in a variety of formats, and unless you have specific requirements or require minimal file sizes are optimisation of some aspect of the image, most formats are produced as expected. PNGs and JPEGs have a simple optimisation process in place and some attempt will be made to strike a balance between speed and file size. JPEGs will lose some quality every time they are processed but their file sizes tend to be very small. If optimisation fails for whatever reason the files are saved without optimisation and may therefore be larger than expected.

PDFs and EPS files can be produced but they have no vector graphics or text components. Both are output as raster images only readable by Acrobat Reader and any EPS viewers, but not searchable or scalable without further processing, for example.