Showing posts with label Technique. Show all posts
Showing posts with label Technique. Show all posts

Tuesday, November 11, 2008

Example of "Focus B&W" function in Picasa

Continuing my crusade for wide spread use of Google's Picasa program, again a FREE program, here is an example of its function called "Focus B&W". It gives you means to convert an image to black and white overall, but leaves an adjustable area of the image untouched in color. You can control the location of the color focus point, as well as size and blending sharpness of the untouched area. It's quick and easy, so it isn't perfect and image selection is the most critical part of applying this feature successfully. Let's see how you like this one.

This is Manhattan in NYC with Manhattan Bridge in the foreground.



I was able to leave out fairly well defined orange structure of the tug boat and convert the rest of the image to B&W. The key to having this feature look natural (and in many cases, like there was a lot of touch up work involved) is the image selection. The area intended to remain in color, must be well defined and not have "busy" surroundings, so as to avoid the "spill over" effect. Keep in mind, that in order to have such a feature applied in auto, programmer's used a circle as a basic shape. While the blending sharpness (or feathering effect of the transition) can be adjusted, it's still far from flexible enough for many cases. So be judicious in choosing the image and you will like the outcome. Bottom line: there is a lot to appreciate about Picasa. In the very least, it will show you the potential of digital manipulation. Sophisticated programs (like Photoshop, Paint Shop Pro, and perhaps most importantly the free GIMP) give an actual total control of what can be done, with an appropriate learning curve to go along of course.

If you would like to see some of other Picasa features applied, check out this short piece with examples of focus and tonal changes.
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Thursday, February 21, 2008

Foggy riverside

Yet another foggy day in the Mississippi river. Mornings are usually best. As the sun rises things change fast, although if the sky has "holes", it may bring along very interesting lighting.
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Wednesday, February 13, 2008

Tank farm

Light (thus time of the day) plays big part in the way tank farms get rendered. It's like a never ending game of highlights and shadows going at each other.
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Tuesday, February 05, 2008

Exposing for RAW?

There is an interesting article in 2007 November issue of Digital Photo Pro magazine (which I frequently enjoy) about exposing for RAW. It brings up an unknown to many (including myself) issue of using camera LCD preview and histogram as means of correcting exposure WHILE shooting RAW. What's the problem, one might ask?

Assuming the author is correct (as I have no way of checking that out, but have no reason to believe otherwise), the histogram and LCD preview on ALL digital cameras are based on processed JPEG file, EVEN if you only shoot RAW. This means that one is looking at a (vastly) different data that RAW records. In extreme cases, your RAW will horribly disappoint later on. You may get to thinking: what did I do wrong? everything looked great on the histogram?

One: keep above in mind in such situations

Two: try to adjust your camera JPEG settings to see if you can get preview match RAW more closely (useless if you shoot JPEG also and unlikely to give you exact match)

Three: learn correct exposure techniques so you rely on the technique rather than the preview/histogram

The mentioned article (titled: Exposing for RAW by Andrew Rodney) is about a so called ETTR technique, that's Expose To The Right, or expose for highlights and develop for such. Film shooters may remember the EFSDFH (expose for shadows develop for highlights), which in most cases gave us the most printable negative. However, the bottom line is only one:

expose to ensure detail where it counts most, yet don't lose the highlights (unless this is your wish, of course)

I can't copy the whole article here (obviously), but I do recommend reading it. It might just fix some of your shooting techniques. The whole article is available HERE. You can even print it.

Digital Photo Pro is a bimonthly magazine targeting the digital photographer. It is (in my opinion) a high quality publication, although somewhat uneven issue to issue. It goes at newsstand for $5.99 and can be subscribed to for much less.

Wednesday, January 09, 2008

One more photograph from previous set up

This is another one from that $70 2-"cool"-light set up, slightly toned.

Sunday, January 06, 2008

Simple portrait in B&W

This simple portrait was shot using a $70 2-"cool"-light set-up with umbrellas. Not ideal, but quite satisfactory. Some more tweaking and would be even better.