Other adjustments (marked by the < symbol) provide subme- nus, which appear as a superimposed window in which the selection is made with the · / ‚keys (Fig. 28).
Image
Aspect
Color Temperature
Gamma Correction
Overscan | 1 |
Position |
|
Y/C Delay | 1 |
Fig. 28a
Image
Aspect |
| Normal |
Color Temperature |
| Anamorphic |
Gamma Correction |
| Letterbox |
Overscan |
| Panoramic |
Position | 1 | Pixel to pixel |
Y/C Delay |
| User 1 |
User 2
User 3
Fig. 28b
These submenus are accessed by pressing the fl key, while exit and return to the upper level occurs by pressing
PICTURE
This menu features the adjustments related to picture quality. Adjustments that are not available for a given input do not appear on the menu. Table 1 summarises the adjustments avai- lable for each input. For a complete overview of the
BRIGHTNESS
Use this control to adjust the image’s black level without affecting white areas. Increasing the value will give more detail in darker parts of the picture. For correct adjustment it may pro- ve useful to display the signal relative to the grey scale within which the black level and the level immediately above it must
be separately identifiable. Alternatively use a scene composed of black objects alongside other dark coloured objects.
CONTRAST
Use this control to adjust the image’s black level without af- fecting white areas.To ensure correct adjustment, it may prove useful to display the signal relative to the grey scale, within which the white level and the level immediately below it must be separately identifiable. Alternatively use a scene composed of
COLOR
This control (also called Saturation) increases or decreases the picture colour intensity. When set to zero, colour images will be shown in black and white. Increasing the value, try to find the point at which the colours look natural: suitable referen- ces include skin tones and grass in landscape shots.
TINT
Controls the purity of the colours. Basically determines the
Reducing the value will boost the red contents of the pictu- re, increasing the value will boost the green tones. For this adjustment use skin tones or a test pattern image with colour bars as a reference.
SHARPNESS
Use this adjustment to increase and decrease the level of picture detail.
When the sharpness value is reduced the image details appear less pronounced, while increasing the value raises image definition, making the outline of objects sharper.
Note that an excessively high value may result in a ‘noisy’ picture and the edges of objects may be unnaturally defined.
SHARPNESS MODE
This allows you to select the type of processing associated with sharpness adjustment. In the case of a progressive or in- terlaced video signal VIDEO mode is advisable; with PC graphic signals use GRAPHIC MODE.
FILTER
This allows you to select the mode in which the input signal is processed. Selecting the most appropriate value for a given input signal ensures the best horizontal and vertical definition and makes the picture sharper.
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