File Type Options - TIFF

The File Type Options dialog is entered when you press Options in the Image Conversion dialog or the Send Image dialog. The dialog allows you to specify convert options for the currently selected image file format.

The available options depend on the file format. Here are shown the options for the TIFF file format.

Color Mode

Best Fit

Let EasyCopy determine the best color mode. This is the default. EasyCopy will choose the optimal color mode for the given image taking other current settings into account.

RGB

RGB means a 24-bit RGB image ("true color").

YUV

The YUV color space contains one luminance component (Y) and two chrominance components (U, V).
YUV is only available together when you choose JPEG Baseline compression. This color space is used rather than RGB because it yields a better compression when JPEG is used.

Gray Scale

If possible a gray scale image using 8 bits per pixel is written, or a colormap defining 256 shades of gray is used.

Bilevel

Bilevel means a bilevel, black-and-white image.

Color Map

A color mapped image with 256 different colors (8 bits per pixel).

Error Diffusion
Enable this option if you want color differences distributed to the neighboring pixels. Normally, this results in a substantially better color rendering, although at the expense of image details; the sharpness becomes slightly degraded. Refer also to the topic Image Shading.

Colormap
This is the color map to be used, if the selected Color Mode results in the creation of a color map of exactly 256 colors.

Optimized

A color map that gives the best representation of the input image. If the input image also is color mapped, the original color map is used. Otherwise, a color map optimized for the current image is calculated.

Standard

A fixed, predefined color map. This option is useful if several images are to appear side-by-side on a device that can only display 256 colors.

Compression

None

Select None to get an uncompressed TIFF file.

PackBits

This is a runlength compression method.

LZW

LZW is an efficient compression method for almost all image types.

JPEG Baseline

This is JPEG compression embedded in the TIFF format. JPEG compression operates on continuous-tone images with one or three components (gray scale or color). Baseline is a sequential JPEG compression using a subset of the JPEG standard.

JPEG Lossless

This is lossless JPEG compression embedded in the TIFF format. This is an efficient image compression method for photographic images.

CCITT Group 3

CCITT Group 4

Modified Huffman

These are CCITT facsimile compressions.

These compressions are imply bilevel images.

JPEG Quality
This option applies to JPEG Baseline compression. For other compressions the box is dimmed.

This is the image quality if you have selected JPEG Baseline compression. You can use the slider to choose a number between 1 and 20 to specify the tradeoff between compression ratio and quality loss.

The leftmost slider position gives the highest compression at the expense of image quality, and the rightmost position gives the highest image quality and a lower compression.

Alternatively, you can use the drop-down menu to select image quality.