Save images as JPEG

Saving Images as JPEG/PNG

JPEG

JPEG image format is the widely used digital imaging format in the industry today because of its portable image size.

PNG

PNG image format is the lossless format which is beginning to gain in popularity.
 
JPEG 2000

JPEG 2000 image format is the new image quality standard which follows the success of JPEG. It provides a better image compression without sacrificing quality.

EXIF Information

Although Batch It! does not extract EXIF information, it would preserve them if they are found in the images. The EXIF information contains valuable information recorded by some popular digital cameras which include shutter speed, focal length, ISO settings and so on. These information are particularly useful for those new to photography.

There are several JPEG specific settings which are located in the Saving Options.

JPEG/PNG Quality (%)

JPEG uses a lossy compression algorithm which allows it to discard certain details thus allowing you to compose 24 bits color images. Thus by setting higher JPEG Quality, you will have better images but larger file size. By lowering the JPEG Quality, you get a smaller file size by sacrificing some image quality.

If you set the image quality between 70 to 80%, you will get a nice balance of file size and quality. Anything lower than 60%, you will see noticeable image degrading. However, if you intend to create thumbnails or low quality previews, setting lower image quality may be desirable.

Note : The Quality (%) is in relations to the current image quality. By increasing the image quality does not create images with higher quality as compared to the original.

PNG uses a lossless compression algorithm but allows you to set different range of quality. This would define the image file size.
 
When saving as JPEG 2000, you can set JPEG Quality below 50% without sacrificing quality.

JPEG Smoothing (%)

Typically, JPEG Smoothing is set at 0% to maintain higher image quality. JPEG Smoothing is used when the JPEG Quality is set lower. In those situation, pixelization especially at the edges are made visible. So to compensate, JPEG Smoothing attempts to blur the images to blend the rough edges.

As a rule of thumb, use 0% as far as possible. If you require smoothing, set it as low as possible, somewhere between 0 to 10%.

DPI Setting

Although not specific to JPEG images, Dot Per Inch (DPI) are usually used with TIFF or JPEG Images and useful if you want to define the image size on print.

Image size is typically defined by pixels on screen and thus DPI settings are usually redundant in such situations.

Today's printers are able to handle interpolation which allows resizing images to fit the page dimensions. Thus making DPI settings somewhat redundant. However, the program allows you to define DPI settings. The higher the DPI setting, the smaller the image dimension in inches on paper.

Progressive JPEG

Standard JPEG would would have to be fully loaded before they are displayed on a web browser. By enabling the Progressive JPEG checkbox, all JPEG images would be saved as Progressive JPEG. This would allow JPEG images to show up progressively while it loads on a web browser.

Note : Older Image Editors and Web browsers may not handle Progressive JPEG. In such situation, uncheck the Progressive JPEG option.