Monday, September 22, 2014

Calibrate your monitor without any hardware

If you are serious about your photography, you must ensure that your monitor is properly calibrated. The importance of display calibration in digital photography can not be overemphasized. There is a lot of difference in the way our eyes perceive a subject and the the way your camera captures. Again there is a wide difference in what your camera captures and what your monitor displays or what your printer prints. One may go at lengths to get a customs white-balance in the camera using proprietary white balance tools like the Expodisc or the Colorchecker Passport but if the monitor is not properly calibrated all that effort goes waste. Each digital camera records colours differently and to make matters worse your monitor interprets colours differently. It is not just colour that is of importance. The brightness and contrast of the monitor also have an important bearing on the way our image appears on our monitors. If you find that your prints are consistently dark, it means that your monitor is too bright.  A red, pink or purple flower may appear different on your monitor from what you actually saw.

If you edit your images in Lightroom or Photoshop (or any image editing software for that matter), it is all the more important to calibrate your monitor. If your monitor is not properly calibrated you may end up adding more contrast to an already contrasty image because the contrast setting of your monitor was very low to start with. You may end up saturating colours that were already saturated or adjusting exposure on a perfectly exposed image.

Placement of your monitor, quality of ambient light and the glare on your monitor screen also play an important role on the accuracy of your display. Ideally the monitor should be placed in a room where the quality of ambient light does not change much. The monitor should not face a window or a direct source of light as this could result in lower contrast. The area surrounding the monitor should neither be too bright nor too dark.

Calibrating a monitor is actually a very complex procedure and involves the use of dedicated hardware and software. These calibration devices, unfortunately, do not come cheap. They cost upward of  US $100. Not every photographer would like to spend that kind of money on display calibrators. Even if you seek professional help to get your monitor calibrated, it does not work out cheap as you have to recalibrate most of the monitors at least once a month.

Is there a simple and cheap way to calibrate your monitor? Well, there is! Buried deep inside your Windows or Mac menus there is a rather crude means of calibrating your monitor. Crude, because it depends on your eyes and can be tricky. Nevertheless, it is better to use this method rather than not calibrating your monitor at all. This may not be as accurate as the hardware based solutions but will be adequate for most amateurs.

I will try to explain this procedure in detail for Windows based PC using screen shots. The procedure for Apple Mac is similar and I have touched upon it at the end.

Calibrating display on a Windows based PC:

These screen shots are based on a Windows 8.1 System but the procedure is basically the same for all versions of Windows.

1. First you need to access the display settings. You can reach there by going to the the Control Panel/Hardware and Sound.

Fig 1

 2. Next, select 'Display'

Fig 2

 3. Select 'Adjust resolution' from the left panel.

Fig 3

4. Select 'Advanced Settings'

Fig 4

5. Select 'Color Management'

Fig 5

6. Again click 'Color Management'

Fig 6

7. In the next window, select the 'Advanced' tab

Fig 7

   8. Select 'Calibrate Display'

Fig 8

9. Next few screens (figures 9-21) are self explanatory. Just follow the instructions on the screen and move on to the next screen (by clicking on the 'Next ' button on the bottom right). Before you begin you should know where the brightness and contrast settings of your monitor are located. These are usually soft-touch buttons on the bottom  or on the right side of the monitor.

Fig 9

Fig 10

Fig 11

Fig 12

Fig 13

Fig 14

Fig 15

Fig 16

Fig 17

Fig 18

Fig 19

Fig 20

Fig 21
The steps represented by Figures 11-20 are crucial to the accuracy of this process and should be carried out with care. The sliders in steps represented by Figures 13 and 20 should be used very carefully. Normally, only very small amounts of correction are required. If overdone the Gama and Color Balance of the monitor can get skewed. If you are using a very old monitor which has no brightness or contrast control, you can skip this calibration in the step represented by figure 14, above. In the last step (Fig. 21) you can see the before and after results by clicking the Previous and Current calibration buttons. If you are not happy with the new results you may click Cancel to go back to the original settings.

Calibrating display on a Mac

The procedure for calibrating a Mac display is by and large the same. To get to the calibration menu follow this route on a Mac: System Preferences/ Display/Color/ Calibrate. Follow the on-screen instructions.
Conclusion:
Usually, after completing the calibration process the screen will look slightly warmer. It may take some time to get used to it but believe me, colors , contrast, brightness and Gama values will be more accurate than before. You will find noticeable difference in skin tones, textures and sky colour.

I will be covering hardware based monitor calibration in a subsequent blog. For now enjoy your calibrated display!
Please do send your feedback and comments. I value them.   

Sunday, September 07, 2014

Think before you click!

I would like to apologize to my readers for the delay in  publishing this blog. The delay was partly due to setting up, calibrating and trying out my new Sekonic  L758 lightmeter. I will cover the advantages of using a light meter like this in a future blog.

In the good old days of film photography, one was more careful about good composition and exposure, primarily because of the cost of film and processing. Depending on the occasion, one would buy films in the minimum possible quantities. May be a roll or two for a long vacation, or a birthday party. It was not uncommon to have a roll with pictures of both, the New Year and Christmas of the same year. Cameras were rarely taken out from the cupboards. While taking pictures care was taken to ensure that the precious film was not wasted. Special care was taken to ensure proper composition and exposure. Those with simple cameras without auto exposure or metering, would carefully read the instruction sheets which came with the film rolls to determine the correct exposure or follow the 'sunny 16' rule. All this was important because, unlike the present,  there was a long delay before one could see the results and the cost involved.

With the proliferation of digital photography all that has changed. The quest for perfection has got diluted somewhere down the line. As results can be seen instantaneously and cost of memory storage is low, the emphasis on proper composition and exposure seem to have taken the back seat. Taking multiple exposures of the same scene seems to be the order rather than exception. Even though the technology provides   excellent tools for exposure control and composition, not many use them. Many still think that by buying costly equipment, their images will automatically turn out  better. I have seen many who have advanced bridge cameras or even DSLR s but do not know anything about exposure compensation, shutter priority or aperture priority. Many are not even familiar with the working of the auto focus systems in their cameras.  All that they care to know is to press the shutter and expect the camera to do all the heavy weightlifting for them. Infact one gentleman asked me if the Tv mode on his Canon Powershot SX50HS bridge camera was intended for capturing images off the TV screen! Unfortunately very few bother to read the user manual. While my future blogs will surely cover the technicalities of exposure I would request the readers to try out the following over the next few days:

1. Read the instruction manual of your camera. If you have lost the camera manual, you can easily download the same from the website of your camera manufacturers' website. In particular read about the different exposure modes available on your camera and how to set up your camera for the exposure mode you want.

2. Consider each exposure as precious (as in the film days!). Think carefully before pressing the shutter release button.

3. Switch your camera to Aperture Priority mode (A or Av mode) or Shutter Priority mode (S or Tv). In other words move away from the P or any fully automatic mode. Learn more about depth of field. Try out shooting with different aperture, starting with the widest your camera provides. Do not get confused with the numbers, small numbers indicates large apertures and vice versa . f/3.5 is a larger aperture than, say,  f/8. Take pictures of a flower or plant at different apertures and see what happens to the background. See how you can freeze a moving object by using a fast shutter speed of deliberately blur it by using a slow shutter speed. If you have a camera (or a cell phone) which has no means to control aperture or shutter speed, do not worry, move on to the next step. I will cover depth of field in a future blog.
Image of a boat with two persons taken at Kumarakom, Kerala, India. The image illustrates the importance of correct exposure. There are details in the sky and shadow areas of the boat
A proper exposure is essential to bring out details in the shadows and highlights.In this picture even a slight overexposure would have resulted in washed out sky.


4. Before pressing the shutter button think about the final image. Will the image convey to its viewer what you intend it to convey? Is the lighting right? Is the composition balanced? Is the background distracting? Is there any unintended object in the frame? (This could very well be your camera bag or a lens cap!) Is the horizon straight and appropriately placed for the image? How is the sky? An overcast grey sky devoid of any detail can adversely impact an otherwise perfect image. You will be surprised that by moving a few steps forward or backward or bending a little can make a lot of difference to the image.
Picture taken at Kanyakumari, the Southern Tip of India showing the Vivekananda Rock and Thiruvallur Statue. This illustrates the importance of correct exposure for the sky and shadow areas
It is essential to ensure proper exposure for the sky. At the same time the details on the statue are clearly visible

5.) After you get back to your computer, evaluate your image critically. Your camera's LCD screen is too small for a proper evaluation. See if the exposure is correct. Has the image been composed well? Are there any distracting elements in the image? Is the horizon straight? Does your portrait suffer from red eye? Is the image free from any colour cast? Is the focus tack sharp? Is there an unintended motion blur? Any evidence of camera shake? I will surely cover many of the issues in my blogs but you can surely evaluate your pictures and plan for better images in future.
Image illustrating the use of leading lines. Image photographed at Kanyakumari, the Southern Tip of India
Colors, and rows of boat visually lead your eyes to the church in the background. In landscape photography it is essential to have interesting foreground

6.) While you should try to get your image right while shooting, do not shy away from post processing. All images coming out from a digital camera can greatly benefit from post processing in an image editor. This is true for images from a cell phone camera or even the most advanced DSLR. You do not require an advanced image editor like, Photoshop, Lightroom or Aperture to edit your images. Simple image editors like Picasa are sufficient for basic image editing. You may also try out the image editing software that might have come with your camera. While in the image editor, you may adjust the exposure, brightness and contrast. Remove R'ed Eye', straighten your horizon and crop your image for  better composition.

7) Store your images meticulously. You should be able to retrieve any image without difficulty. Storage devices are becoming cheaper. Do consider investing in a high capacity external hard drive exclusively for your images. You may like to classify and name your folders appropriately for quick retrieval. You may also like to have a folder exclusively for your best images. This will serve as a great learning tool to enhance your skills.

8) Consider printing some of your images. There are many online print retailers. Nothing like having your own prints framed and decorating your wall.

9) You can easily show your images to your friends on any modern TVs. For most LCD/LED TVs an imaged cropped to an aspect ratio of 16:9 will appear as full screen without any black crop band above and below your image. You will find 16:9 crop as one of the crop preset in any image editing software including Picasa.
Use of contrasting colours for visual appeal. Photographed at Coorg, Karnataka, India
Contrasting colours and a the dirt track visually lead you into the frame


10) Share your images with your friends and relatives through on line albums like Picasa and Flicker or through social networking sites like Facebook.