We see that the Diffuse Dome Light and Flat Diffuse Light work equally well for relatively small areas of the PCB (Figures 3A & 3B).  In comparison, the large Diffuse Dome is less effective than the Flat Diffuse Light on larger fields-of-view, primarily because the dome has to be oversized by at least 50% of the intended field-of-view size (Figures 3C & 3D).

Prompt: “A close-up of a glass of wine on a table in a dimly lit restaurant, with bokeh lights from the cityscape outside softly blurred in the background, adding a warm and inviting atmosphere.“

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Advanced illumination offers a diffuse source to address the application shortcomings of other diffuse, bright field lights: the FX0808 Flat Diffuse Light and FD0808 Back-lit Flat Diffuse Light.  These Flat Diffuse Lights are a highly diffuse source with a viewing port in the center, allowing it to be used as front, or projection light (Figure 2).

PCBs can be challenging to illuminate correctly, particularly those with large or odd-shaped components, like capacitors or heat sinks. Figures 3A-3D illustrate the differences among the three diffuse lighting options: dome, flat, and coaxial.

Strobe lighting captures a subject frozen in mid-move. Professional photographers use specialized equipment to create this “stop-motion” effect.

In AI-generated images, we can use this technique to achieve special effects in our images. Tengr.ai might not always perfectly recreate traditional strobe photography, but it will definitely come up with some unique interpretations of it.

Backlighting and silhouette lighting are popular in photography and in AI art. They are very similar as they both create dramatic, high-contrast images that focus on shapes and outlines rather than details.

Using lighting techniques in AI-generated art isn’t just another detail to add to your prompt. It’s the storyteller and the mood-setter of your image. We’ve already touched on this topic in a previous blog post and covered some basic lighting techniques. This time, we’ll take it further, and explore some more interesting lighting concepts These can add a little ‘special effect’ to your AI art.

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If we instead apply the same lighting schemes to a longer working distance view (Figures 6A-6E & 7A), one that may only require 1-2 image frames per tray, we see that only the Flat Diffuse Light and the DL097 Diffuse Dome Light are effective (Figures 6D & 6E, respectively).  Of course, a much higher resolution camera would be necessary to resolve the 2-D laser etched codes.

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You know those blurry circles of light in the background of some photos? That’s called Bokeh lighting. It’s a technique that photographers and AI artists love to use. No wonder, as it creates a warm, dreamy atmosphere and gives images a romantic look. However, when used in urban nighttime settings, it can also create a colorful, festive vibe.

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For illustration purposes, we can see the 2-D matrix code in close-up views (See Figures 5A–5D).  A 2” (50 mm) working distance is necessary for the code to be read and verified with a standard resolution CCD camera, while also being typical of the working distances required for effective diffuse and coaxial source lighting.

Bioluminescence is that natural glow emitted by certain living organisms (fungi, marine microorganisms, insects). In AI art it appears as an ethereal, magical light that gives a surreal look to images.

Try using words like: “light passing through a crystal”, “prismatic light effects”, “spectrum of light”, or even “lens flare” in your prompts to achieve this prismatic photography effect.

Prompt: “A dramatic night scene in a dimly lit cobblestone alley. A man stands under a street lamp. Cool blue moonlight filters through fog in the background. The scene evokes a sense of mystery and tension, reminiscent of classic film noir. High contrast cinematic volumetric lighting.“

This lighting technique means that the camera is being directed towards a strong light source. Its’ like taking a picture facing the sun.

We also see that this short working distance contributes to an effective lighting geometry.  However, this is not an efficient sampling strategy, as the 75 x 125 mm tray would require multiple X & Y traverses to inspect the entire tray.

Prompt: “Surrealism: mystical forest with intricate bioluminescent fungi shaping a glowing path. The ground is covered in bioluminescent plants and flowers, each arranged in spirals, illuminating the forest floor with an ethereal glow.“

Colored gel lighting means placing colored filters (gels) over light sources to cast different colored hues. It’s a cool trick photographers use, and now we can play with it in AI art too.

However, while most of these are inspired by real photography techniques, Tengr.ai might interpret them in its own creative way. So, even if it doesn’t perfectly replicate the traditional method, you’ll still get some truly special results.

Simply mention the “bioluminescent”, “glowing” elements in your prompt to get that magical glow. This works best with dark backgrounds as it makes the bioluminescence stand out.

To achieve this dynamic, energetic look with surreal atmosphere in our images, use terms like “multiple exposures,” “frozen motion,” “time-lapse effect”, “sharp, bright flashes”, “high contrast”, “ghostly trail of movement”, or “stroboscopic pattern.”

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Not exactly like that, due to using completly different model, but when you create from image the Processing modes can achieve similar or better effects. Try Blueprint, Depth or Sketch.

I am glad that they have finally started to deal with photographic lighting. Unfortunately, some of the options presented here do not correspond to real photographic situations, they are not authentic. They still need to be developed. Recommendation: It would be a great advantage if the program was prepared for accurate modeling of light sources and lighting in the photo studio. I would be happy to give you specific advice on these. Istvan Dekan professional photographer, writer,

“High-speed photograph of a dancer in motion, captured using stroboscopic lighting. Sharp, crisp details of the dancer are visible at key points in the motion, illuminated by bright, white strobe flashes. The image has a surreal quality, showcasing the fluidity of human movement in a single frame. High contrast, black background, white light.“

Picture light going through a crystal – that is what prism lighting is about. It creates a magical, rainbow color effect which can really make images surreal, like a dream.

“(Contre-Jour photography), A cyclist riding through a misty forest at dawn towards the rising sun, creating a dramatic silhouette against the light. (dramatic contrast between light and dark). The fog diffuses the sunlight, adding a mystical atmosphere to the scene.“

Specifically, as illustrated in Fig 1A, a Diffuse Dome Light illuminates from nearly an entire hemisphere; hence it is described as having a relatively larger “solid angle”  than the directional Spot Light depicted in Figure 1B.

Figure 4 illustrates the limited size application of the 2”x2” Square Coaxial Light, where large size and set working distance are critical.

Surfaces prone to uneven reflectivity are often challenging to inspect – particularly with bright-field point sources commonly used in machine vision systems.  To achieve more uniform contrast over such surfaces, one solution is to apply diffuse lighting techniques.

The best thing about this technique is that you can change the mood of your picture with the use of colors. Bold, strong colors can make your picture feel lively and energetic, while soft, pastel colors can have a calm, chill effect.

In AI-generated images, this technique can help you create abstract designs with glowing, dynamic light-trails. Go beyond typical long exposure photographs (although those are stunning too). Explore more surreal, otherworldly styles for stunning results. We even used Fairytale style for some of these examples. Using unexpected styles can get you surprisingly eye-catching results.

2) to maintain a high solid angle for even light distribution over curved or topographic surfaces, the low angle component from the dome interior must also be incident on the surface.

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“Helical flower drawing, bioluminescent details, insanely hyper-detailed, ornate, sleek lines, flowing fluid lines, artistic, masterpiece art.“

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“A futuristic cityscape with light trails, light painting technique that forms surreal, swirling patterns, adding a sense of energy and movement.“

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“A nighttime cityscape with (vibrant, colorful bokeh lights). In the foreground, a silhouette of a person holding an umbrella stands on a rain-slicked street. The background is filled with blurred, circular lights in shades of purple, teal, gold, and pink, creating a dreamy, magical atmosphere. Soft focus on the subject, shallow depth of field, cinematic lighting.“

In photography terms, ‘gobo’ is when you project patterns of light and shadow onto a surface or subject. It’s an artistic effect that works great in AI-generated images too. It might not always look exactly like a ‘gobo’ in the traditional sense, it still creates unique and intriguing images. Plus, it adds some mystery and complexity to your artwork.

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“Sublime fashion photography portrait through (colored gel lighting), illuminated by multiple colored light sources, each casting a different hue on the subject, creating a vibrant and surreal atmosphere.“

Prompt: “(Prism photography), (subtle lens-flare), (Prism lighting), a prismatic light of colors across a sublime fashion photography portrait, creating a surreal, otherworldly atmosphere.“

Prompt: “(Silhouette lighting), (strong backlight), dramatic shadows, studio portrait of a girl, high-resolution image emphasizing fine details, hyper-realistic.”

“A lone figure standing on a misty mountaintop at sunrise, with the early morning sun directly behind them, creating a dramatic silhouette, (silhouette lighting), (backlight). ”

Mentioning terms like ‘soft bokeh background’, ‘warm golden bokeh’, ‘colorful bokeh’, ‘subtle bokeh effect’, or ‘pronounced bokeh background’ in your prompt can get you that dreamy backdrop.

Prompt: “A music artist performing on stage under colored gel lighting, with deep blues and purples blending together to create a vibrant, energetic atmosphere, highlighting the intensity of the performance.“

Prompt: “(Strobe light effect), An athlete in mid-air during a jump, captured with strobe lighting to freeze the movement, against a pitch-black background.“

Another typically challenging part to illuminate effectively is the biomedical culture or sample titer tray. These parts are often presented on a tray with a matrix of regularly spaced wells of varying size and depth. In this particular example, the wells are relatively small (5 mm wide) and shallow (3 mm deep), and spaced at approximately 8 mm in X and Y. Additionally, each well has a laser-etched 2-D matrix code that must be read and verified by a vision system as part of an FDA-requirement for sample correlation and tracking history.

The image depicted in Figure 6E demonstrates that the DL097 Diffuse Dome Light effectively illuminates the tray at longer working distances.  But for larger sampling areas, we still require larger domes, which can be bulky, expensive, and may require longer lead times.

In AI art, you can achieve this effect by lighting the subject from behind. This backlighting technique will leave the subject in a mysterious shadow against the brighter background.

When you use this lighting in your prompts, Tengr.ai is trying to recreate that cinematic, mood-setting visual seen in movies. We see carefully placed light sources to create that mood, and intentional shadow placement to emphasize the emotional and storytelling impact of AI images.

It’s also important to pair the lens focal length correctly in order to prevent vignetting, or “port-holing” – which is particularly true of the Diffuse Dome Light.

Prompt: “Digital art: Night-time, dramatic black and white photograph of a bustling mesmerizing cityscape, (play of lights on the sky), (abstract light streaks on the sky), surreal, magical, sleek lines, elegant, artistic, streaked clouds.“

While in traditional photography they use specific lenses and settings to get that beloved out-of-focus blur, in AI-generated images it’s a bit easier to create this effect.

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It’s not difficult to imagine that a high solid angle light can become an increasingly lower solid angle and less intense light (inverse square rule) as the working distance is increased, effectively turning it into a more directional point source!

Thank you so much. Indeed those features are heavily in development (like most of our AI solution), we hope to reach a more accurate version in 1.0.

We hope you enjoyed this exploration of amazing lighting techniques! They were meant to inspire you and give you a boost in creativity.

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While the Diffuse Dome Light is very effective on specular, curved, and topographic surfaces, and the Coaxial Light is effective for specular, flat, and angled surfaces of varying heights, both techniques have very specific application criteria that can present a challenge under some lighting circumstances.

Figure 7A illustrates the entire tray lighted using the FX0808 Flat Diffuse Light at a 12” (305 mm) working distance.  In conjunction with a high-resolution CCD or CMOS camera, the FX0808 provides for a very robust and efficient inspection solution for larger fields of view.

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Prompt: “(Patterned light effect), (Deep dramatic shadows), a close-up black-and-white photograph of a woman with dramatic striped shadows cast across her face, light pattern to create interesting shapes and patterns on her face.“

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We encourage you to do a lot of experimenting with these lighting techniques. We’d love to see your creations on our Facebook community page!

To maintain sufficient incident light intensity, uniformity, and angular distribution, Diffuse Lights are best placed close to the intended inspection surface.  This is particularly crucial for the Diffuse Dome Light for two reasons:

As discussed in our previous Lighting Education Blog Post, diffuse lighting in machine vision applications may be classified as full bright field illumination as opposed to partial, or directional bright field lighting.  The underlying concept behind full bright field illumination, defined as illumination with a larger “solid angle”, is that light is sourced from a large area and is incident on the object surface from multiple angles (Figure 1A).

Using terms like “geometric shadows”, “floral light patterns”, “window blinds casting shadows”, “patterned light effect”, or “sharp, high-contrast shadow patterns”, in your prompt can help achieve this effect.

“A majestic deer standing on a misty mountaintop at sunrise, with the early morning sun directly behind it, creating a dramatic silhouette, (Silhouette lighting), dramatic shadows, (backlit).”

“A close-up of a detective sitting at a dimly lit bar, with dramatic, low-key lighting casting strong shadows across his face, emphasizing the tense, noir-inspired mood. (Cinematic lighting).“

Let’s view images from samples that illustrate the advantages of applying the Flat Diffuse Light versus other diffuse lights, including a Diffuse Dome Light and a Square Coaxial Light.

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A very dark garnet illuminated from behind on a light table.

Light painting involves moving a light source to create trails of light, similar to ‘painting’. These are actually long exposure pictures in photography.

Remember, these are just starting points. The real fun begins when you start playing around with these concepts and let your creativity shine. Don’t worry if Tengr.ai doesn’t create exactly what you imagined – sometimes the most amazing creations come when you let Tengr.ai bring its own creativity to the mix too.

“(Prism Photography), (prismatic light effect), a prismatic light of colors across the surrounding beautiful, mesmerizing landscape, creating a magical effect.“

“A lone, windswept tree standing on a misty, foggy hilltop, silhouetted against the sun,(brightly lit background creates a rim of light around the edges of the tree), adding a mystical or ethereal quality to the image. Sharp contrast between light and dark, (Contre-Jour photography).“

Try adding terms like “glowing trails of light” or “swirling patterns” to achieve the light painting effect. These images work well with dark backgrounds.

To achieve this effect in your images, use terms like “cinematic volumetric lighting”, “low-key lighting,” “high contrast”, “chiaroscuro effect”, or “moody film noir lighting”.