TONE CURVES AND HISTOGRAM

SETTING THE WHITE, BLACK OR GREY POINTS

White point (highlight point) indicates the section you want to lighten, Black point (shadow point) the section you want to darken, and Grey the section you want to have as neutral tone. An image with no highlight or shadow will not be clear and appear dull. You can correct the image by adjusting the White point/Black point/Grey point buttons to enhance the highlight or shadow point so that the image will have good contrast

and not be all white or black. Also if the image has too much contrast, you can correct it by weakening the highlight or shadow point.

•Changes are automatically applied to the prescan image.

Setting the White Point

 

 

 

1. Double-click on

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Point Value Setting dialog box

 

 

 

•The Point Value Setting dialog box is displayed.

•The initial value of the White point is 255 in each R, G and B.

2.Input the desired white point value.3.Click on .

•The cursor changes to the white dropper shape.

4.Click the desired highlight point of the image.

•The image is corrected so that the point you clicked is the highlight point. The colour of the highlight point is the white dropper value you input in step 2.

•The change will be reflected in the prescan image.

•You need to identify the true highlight points of the image, not pure white points that have no detail, such as reflection points. White with no detail is called specular white and ink will not be used in these parts when printing.

•Normally, if you set each R, G, B colour to 250 to 253, white will have less brightness. You may lose the gleam of a white cup.

•When the film type is set to the colour mode.

•When the film type is set to the monochrome mode.

Setting the Black point1.Double-click on .

•The Point Value Setting dialog box is displayed.

•The initial value of the Black point is 0 in each R, G and B.

2.Input the desired black point value.

DiMAGE Scan Multi PRO 67