### Content inspector for images

Opacity

  Each image has an adjustable opacity from 0% to 100%. Adjust it by entering the desired numeric value or move the slider with the mouse.

Blend Mode

  Here you can define how the image frame will be blended with the background. Blend mode is described in detail at the end of the Inspectors chapter.

Image

  The following parameters refer to the image content itself.

  Resolution

    Here you can see the current resolution of the image in the selected frame. The resolution is measured in dpi (dots per inch). For high-quality prints, images should be scaled to 300dpi at least. Lower or higher resolutions may be suitable, depending on the purpose of the image.

    When image resolutions are below 150dpi, they are shown in red. Image resolutions from 150 to below 300dpi are shown in orange. 300dpi and above are shown in normal black text.

    You can see the current image resolution here, and you can even select a common image resolution after a click on the pop-up menu. The image will then be scaled immediately.

  Color Model

    Here you see the detected color model of the image. Read more about color models in the Edit color chapter of the Color inspector.

  Color Profile

    Here you see the detected or currently assigned color profile for the image. The popup menu offers a variety of color profiles, depending on your OS X system. You can assign another color profile, e.g. for separation purposes. An assigned color profile may change the color representation of an image, but does not change the image data.

    Note: If you want to use your own ICC color profiles, you have to copy them to /Library/ColorSync/Profiles/ first. They will then be available in iCalamus, too.

Adjustments

  Here you find some basic image filtering support.

  Exposure

    Move the slider to adjust the exposure of the image. You can also use the numeric input field or the value stepper to change the values.

  Saturation

    Move the slider to adjust the saturation (which is the color intensity) of the image. You can also use the numeric input field or the value stepper to change the values. Set saturation to 0 to make the image black and white.

  Enhance

    Click this button to let iCalamus automatically enhance the colors.

    If you click this button, the Adjust Image window opens where you can adjust more image parameters.

  Reset

    This button resets all image filters.

  Important: Not edited images will always be output in the format in which you have imported them, e.g. a JPEG will be written as a JPEG into the PDF. If you filter an image with the options offered here, it can only be done with uncompressed images. The uncompressed and filtered image will then be placed as a (automatically lossless compressed) TIFF in the PDF, but not in JPEG format which it probably was before. Compressed TIFFs are significantly larger than JPEGs. Thus PDFs with filtered images are usually much larger than those wich not edited images.

Additional functions

  Click the action symbol in the bottom left corner of the Content inspector to access additional functions.

  Create Opacity Based Outline

    If the image in the selected frame contains transparency information, you can create an outline using this function. Then use the outline for image clipping, text wrap or other layout purposes. When you choose the function, the following dialog opens:

    The red tinted area which is shown in the preview, is above the threshold which can be set at the bottom of the dialog. A threshold of 0% creates an outline that clips only the white parts. A threshold of 100% does not create any outline at all.

Adjust image proportional to frame size

  When you see the tiny frame symbol at the Content inspector bottom tinted red, it signals that the image in the frame is currently not sized to its original proportions. With a click on the symbol you can adjust the image in proportion to the current frame size. The image will be centered in the frame.