Archive of ‘Technology’ category

Photoshop – the Best Jig Saw Puzzle Solver

Source image for photo merge

I am working on a personal project to preserve as much of my photo history before everything fades away. My memory will not hold for very long either, I suspect! In some cases, there are some publications where my photos are used, and these larger formats are difficult to preserve digitally. Due to the size of some of these publications, it is not possible to capture the entire spread with one pass of the scanner which is only letter sized. To do this before was a very complicated puzzle-building process. I would have to scan as much of the newspaper-sized pages on the scanner in sections making many different parts that overlapped each other in content. Sometimes, I would have up to 8 different images depending on the size of the print. In this example, I only have 2 separate images:

Source image for photo merge
Source image for photo merge

Photo Merging

Source image for photo merge
Source image for photo merge

As can be seen in this example all the overlap between the text and the images on the page. In older versions of Photoshop, I would bring in both source images, and lay one on top of the other on a large empty background. Then I would reduce the opacity of the top layer, and maneuver it until the overlapping parts were right over each other on the layer below. It was time consuming, but it was possible. In the newer Photoshop versions, there is a nice automated way of doing this. First, open both images in Photoshop, then click on “File > Automate > Photomerge” which bring up this dialog box:

Photoshop CC Photomerge dialog box
Photoshop CC Photomerge dialog box

Click the Add Open Files button to add the open images to the process box. Make sure the box – Blend Images Together is selected, then click ‘OK’. Now Photoshop will quickly merge these two images using the overlapping information from each piece to create one large, merged document! This couldn’t be easier. I now only have to make sure that I have lots of overlapping areas from the large print. Knowing that the computer will do all of the aligning, you can scan in as many images as you would like. I have done this with up to 10 different images with no problem.

Large Merged Document
Large Merged Document

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Comparing HDR to Non-HDR images

Lincoln Memorial and Washington Monument from Virginia - ©TimeLine Media

With all my landscape images, I have been bracketing exposures with the intent to do some post processing on the photos and create a high dynamic range (HDR) final image. One evening, I walked out on the Virginia side of the Potomac River from Washington, DC to the Memorial Bridge. This is a beautiful spot to make images of the Lincoln and Washington Monuments especially in the early evening. With the sun lowering, the white buildings again take on that pink/orange hue of the fading light.

Lincoln Memorial and Washington Monument from Virginia - ©TimeLine Media
Lincoln Memorial and Washington Monument from Virginia – ©TimeLine Media

HDR testing

In looking through the set of images that I made after the shoot, I did notice that this night had a smoggy haze. With rush hour traffic starting to build, it did not make for as nice a scene as the crisp winter mornings. The haze came in the middle of the frames underneath the blue, and stayed over the pink part of the sky overlaying this ugly gray layer.

This was just bad luck for the time I happened to be out there shooting. Obviously, it makes me want to try this on a different day. Perhaps I can get a better result next time. In any case, I saw the result from the post processing the bracketed photos with Photomatix. I wanted to compare it to the RAW file images. With this in mind, I had a feeling that being able to shoot at a low ISO. Additionally, with all the detail and information that the Nikon D4 gathers, I could make one of the RAW files that was in the middle of the bracket look just as good as the HDR image.

Washington, DC

Lincoln Memorial and Washington Monument from Virginia - ©TimeLine Media
Lincoln Memorial and Washington Monument HDR from Virginia – ©TimeLine Media
Lincoln Memorial and Washington Monument from Virginia - ©TimeLine Media
Lincoln Memorial and Washington Monument non-HDR from Virginia – ©TimeLine Media

What I learned in looking at these photos, is that there is not a huge difference between the dark and light sections of the photo. Moreover it is very possible to make one exposure similar to a realistic HDR image from 7 bracketed photos. The Raw file was adjusted in Adobe Lightroom with just some contrast, clarity, and vibrance added to the original file.

I then adjusted the white balance of the scene to mimic the HDR, and these photos looked very similar. Although it is not something that I am comfortable yet pre-visualizing. So it is nice to have the bracketed photos as a backup. I will probably continue to shoot both ways, and processes them in 2 ways, until I can more easily predict when it will save me a lot of time and memory card space to shoot just one photo instead of the whole series.

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Creating Vignettes with Flash

Lighting the Roosevelt Memorial with small flash - ©TimeLine Media

On yesterday’s post, I wrote about creating vignettes, in Photoshop. Today, I want to post some photos of another cool way to create vignettes, but this time, doing it in camera. I made these at the Franklin Delano Roosevelt Memorial in Washington, DC. In this walk-through park dedicated to the longest-serving US President, there are many of his quotes engraved into the large pink-colored blocks that make up the monument. You can use the color of the blocks to your advantage as pink and blue are next to each other on the color wheel, so they will work together well in a frame. Here is a frame of the manual exposure setup in the camera without the flash:

Roosevelt Memorial without flash - ©TimeLine Media
Roosevelt Memorial without flash – ©TimeLine Media

Washington, DC

I am just looking to keep a dark, saturated blue in the sky. The flash will be used to illuminate the foreground and pop the subject out of the frame. To setup the flash, I put a warming gel over the front of the flash. Additionally I zoomed the head in to 180mm. This focuses the flash into a tight circle as opposed to just spilling light all over the scene. This is what creates the vignette effect which will draw your viewer’s eye to where you want it to go. I hand held the flash with my left hand, and made this photo:

Lighting the Roosevelt Memorial with small flash - ©TimeLine Media
Lighting the Roosevelt Memorial with small flash – ©TimeLine Media

How far you zoom the head, can make the circle of light larger. Especially if you have more of an area you want to cover in light. This next photo, I zoomed the head out farther since I was standing farther away, and had more words that I wanted to light:

Lighting the Roosevelt Memorial with small flash - ©TimeLine Media
Lighting the Roosevelt Memorial with small flash – ©TimeLine Media

It was a challenge to get the light exactly right. Sometimes, I would flash the ground, sometimes, I would only light the trees above the blocks. It would be much easier to do this with the flash on a stand that you can control with more consistency, but I did not want to risk any entanglements with the park rangers. I simply used a hot shoe cable cord to get the flash off the camera, and fired away. Give it a try next time to get a different look at places that are photographed all the time!

Lighting the Roosevelt Memorial with small flash - ©TimeLine Media
Lighting the Roosevelt Memorial with small flash – ©TimeLine Media

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703-864-8208

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