The so-called "development process" a digital photo (sometimes reported by the terms "development in Camera Lucida" ), through which reveal the image taken and act on parameters such as: exposure, contrast, saturation, sharpness, etc. ., does not involve the use of chemicals as they did with film in traditional photography, but is realized through the use of specific software.
If you store your images as RAW files (translated into Italian: raw), the chances of getting the best image is taken are much higher, given that we have collected primary data from the sensor and which has not yet spoken with optimization processes, as is the case in which the camera records images directly in JPG files. In fact, on one hand the use of standard JPEG compression significantly reduces the weight of the individual photos to store, the other always involves a loss of information, and the process is automatic does not always return the best results or as hoped by the photographer. However, if you will still need to take action to improve the photo in JPG, and whenever you make adjustments to the file and then make a new save, it will be a further loss of image quality for each next step. Working
instead on RAW files (which will always be available with its unmodified basic data), we can save in JPG only when we are satisfied with the result, not only we will have complete control over the image, but we will also have the opportunity to obtain the highest possible quality in the characteristics of the captured image.
The software used for the detection of RAW image and its development is: Adobe Camera RAW , plugin embedded in the program Photoshop. Let's see how it's done and what commands:
- The central area is reserved for displaying the image, and in its frame at the bottom you can see: the middle name of the file, while the left is the 'indication of the magnification of the image and controls to increase in order to facilitate verification of the results obtained during the adjustment.
- In the left column we find the RGB histogram, representing the brightness levels in the image, and just below the data for: aperture, exposure time, sensitivity and focus, used for the shot. In the top corners to the sides of the histogram are two buttons that allow you to highlight: the left in shadow areas with excess (the image will be in dark blue), and the right lights in excess (in red) sonsentiranno we also check visually the effect of the interventions made
to recover those areas that would otherwise be totally devoid of detail, due to a marked over-or underexposure.
Immediately below is a group of buttons that make access to the control panels of the present regulations, examine them from the first left:
Control Panel "Base":
- White Balance: you can ask the program to use an automatic balance, or select one corresponding to standard conditions similar to those we find in our camera. But if we want to regulate more precisely the balance of our photos we can move the slider of the "temperature" of color (TDA 2000K to 50.000K), and also make compensation for any remaining dominant colors with green or magenta, via the cursor adjustment of the "Hue".
- Display: adjusts the overall exposure of the photo, acting on all areas of the image (showing the values \u200b\u200bin "stop") and allows to exploit the full dynamic range of RAW files.
- Recovery: acts mainly on the lighter areas of the picture dark.
- Fill Light: acts mainly on dark areas, clearing.
- Blacks: shifts the threshold that determines what level of color density will be played as if they were equal to black.
- Brightness: acting on any photo (light and shadow), expanding or compressing the range available, while the exposure is only by a shift to the two extremes of values.
- Contrast: apply a correction to the non-linear tone curve, getting to change the transition from one hue to another.
- Clarity emphasizes the depth of the image by emphasizing small differences in color and brightness, acts mainly on the intermediate tones or halftones.
- Brightness: adjusts the saturation acting mainly on the colors duller.
- Saturation: acts equally on all the colors in a linear fashion.
Panel "Tone Curve": proposes the histogram shows only the brightness values \u200b\u200band changes the image contrast operating on four main areas: lighting, light colors, dark colors and shadows. You can adjust the individual area by using the appropriate sliders, and how to change the tone curve on the chart that originally was represented by a straight line (linear response). If you prefer we can also choose to work manually for "points" by changing the shape of the curve directly on the graph.
changing the position of the three arrows in the diagram, and delimiting the field of the four areas described above, you may have employed curve to any number of things can change in a more precise answer to some specific areas.
instead on RAW files (which will always be available with its unmodified basic data), we can save in JPG only when we are satisfied with the result, not only we will have complete control over the image, but we will also have the opportunity to obtain the highest possible quality in the characteristics of the captured image.
The software used for the detection of RAW image and its development is: Adobe Camera RAW , plugin embedded in the program Photoshop. Let's see how it's done and what commands: - The central area is reserved for displaying the image, and in its frame at the bottom you can see: the middle name of the file, while the left is the 'indication of the magnification of the image and controls to increase in order to facilitate verification of the results obtained during the adjustment.
- In the left column we find the RGB histogram, representing the brightness levels in the image, and just below the data for: aperture, exposure time, sensitivity and focus, used for the shot. In the top corners to the sides of the histogram are two buttons that allow you to highlight: the left in shadow areas with excess (the image will be in dark blue), and the right lights in excess (in red) sonsentiranno we also check visually the effect of the interventions made to recover those areas that would otherwise be totally devoid of detail, due to a marked over-or underexposure.
Control Panel "Base": - White Balance: you can ask the program to use an automatic balance, or select one corresponding to standard conditions similar to those we find in our camera. But if we want to regulate more precisely the balance of our photos we can move the slider of the "temperature" of color (TDA 2000K to 50.000K), and also make compensation for any remaining dominant colors with green or magenta, via the cursor adjustment of the "Hue".
- Display: adjusts the overall exposure of the photo, acting on all areas of the image (showing the values \u200b\u200bin "stop") and allows to exploit the full dynamic range of RAW files. - Recovery: acts mainly on the lighter areas of the picture dark.
- Fill Light: acts mainly on dark areas, clearing.
- Blacks: shifts the threshold that determines what level of color density will be played as if they were equal to black.
- Brightness: acting on any photo (light and shadow), expanding or compressing the range available, while the exposure is only by a shift to the two extremes of values.
- Contrast: apply a correction to the non-linear tone curve, getting to change the transition from one hue to another.
- Clarity emphasizes the depth of the image by emphasizing small differences in color and brightness, acts mainly on the intermediate tones or halftones.
- Brightness: adjusts the saturation acting mainly on the colors duller.
- Saturation: acts equally on all the colors in a linear fashion.
Panel "Tone Curve": proposes the histogram shows only the brightness values \u200b\u200band changes the image contrast operating on four main areas: lighting, light colors, dark colors and shadows. You can adjust the individual area by using the appropriate sliders, and how to change the tone curve on the chart that originally was represented by a straight line (linear response). If you prefer we can also choose to work manually for "points" by changing the shape of the curve directly on the graph. changing the position of the three arrows in the diagram, and delimiting the field of the four areas described above, you may have employed curve to any number of things can change in a more precise answer to some specific areas.
0 comments:
Post a Comment