posted on 2018-06-25 13:06:46
Scenes in white and high light areas should appear as neutral minimum density points in the photograph. The original details of the scene in these locations should also be restored and represented in the photographs, with minimal discernible details. On the one hand, it is affected by the balance of color and contrast and the density, and on the other hand, it is also affected by the level of photographic paper and film fog, the contamination of liquid medicines, the preservation of materials before and after processing, the preservation of photographic products, and fixing and stabilization.
Second, the shadow area
Dark areas or areas with high density should be neutral and non-representative, and those with density slightly lower than the maximum density should have corresponding level details of the original scene. In addition to being affected by the exposure, it is also affected by the overall density, color, and contrast of the photo. In addition, the preservation of materials and photos before and after processing, liquid contamination, improper bleaching, and fixing all affect the performance of the shadow area.
Third, the color saturation
The color concentration is sufficient, and it feels fresh, transparent, non-cloudy, and not boring. It is saturated. Logically, if the colors of the original scene are accurately restored, the photos will not be boring. Color saturation is affected most by film exposure. Improper development, bleaching and fixing, and liquid contamination all reduce the color saturation of the photo.
colorful scenery created a colorful nature, in the human vision left immemorial impression, good photos need to properly reproduce the color of the scene. In rich colors, the colors of some scenes, such as the blue sky, green trees, and human skin, have the deepest memory, and small deviations can be identified and feel unnatural. Some people call these colors a memory color. The color of a picture is based on the memory color. A picture should also pay attention to the balance of color, high light and medium and small density neutral gray is the most sensitive place in the color balance, these parts are neutral gray, non-colored, indicating that the photo's color balance is good. The quality of photo color reproduction is greatly affected by the balance of the photo source, the printer, and the development process.
The contrast of each image layer should be matched, and should be balanced at any density level, otherwise, it is impossible to obtain good color balance in the whole exposure range. For negative film, if the contrast of the green layer is lower than the contrast between the red and blue layers, the photo density, such as hair and shadows, will be greenish, although the medium density skin may be well-balanced. Poor preservation of the film, contamination of the processing fluid or incorrect mixing of the liquid, excessive or insufficient development, or improper bleaching or fixing may all result in unbalanced contrast. The level of contrast should also be appropriate, not too high nor too low. A photo with a low contrast will feel "smeared" or "flat" because the density range at highlights and shadows is too low. If the contrast is high, the tone will appear too hard because the highlights and shadow density range are too large. The lack of detail in the highlights will result in "a whitewash," and the lack of details in the shadows will be manifested as "packing" and "massage." High contrast is mostly caused by underexposure and over-development, while low contrast is often the result of overexposure and underdevelopment.
light and shade is one of the most significant attributes of the scene. The brightness of the scene should eventually be reduced to the corresponding level of density of the photo, which is the same for both black and white photos and color photos. To be professional, you need to restore the correct tone. The density is affected by the development conditions and the exposure of the camera and printer.