The Negative Photo-illusion Try Keep trying-retinal fatigue

Experience  retinal fatigue ---the world is limited only what you see yourself ,rest come from imagination only if you have ---plenty of them to make them even wider.

Stare at the colored dots on the girl's nose in the photo above for 30 seconds. Then look at a white surface (blank browser, mayhaps) and start blinking. You should see a non-negative image of the girl. WHAT. BRAIN. MELTING. WHAT. OHMYGOD. Yep, that jiggly stuff in your head just processed a negative image. Sweet

The Negative Photo Illusion

Image by geloo, modified by Kendra Cherry

Did you think that you needed a darkroom to process a negative photo into a full-color image? In this fun optical illusion, you can see how your visual system and brain are actually able to briefly create a color image from a negative photo.

How to Perform the Illusion

1. Stare at the dots located at the center of the woman's face below for about 30 seconds to a minute.
2. Then turn your eyes immediately to the center x of the white image on the right.
3. Blink quickly several times.

What do you see? If you've followed the directions correctly, you should see an image of a woman in full-color. If you are having trouble seeing the effect, try staring at the negative image a bit longer or adjusting how far you are sitting from your computer monitor.

Explanations

How does this fascinating visual illusion work?

What you are experiencing is known as a negative afterimage. This happens when the photoreceptors, primarily the cone cells, in your eyes become overstimulated and fatigued causing them to lose sensitivity. In normal everyday life, you don't notice this because tiny movements of your eyes keep the cone cells located at the back of your eyes from becoming overstimulated.

If, however, you look at a large image, the tiny movements in your eyes aren't enough to reduce overstimulation. As a result, you experience what is known as a negative afterimage. As you shift your eyes to the white side of the image, the overstimulated cells continue to send out only a weak signal, so the affected colors remain muted. However, the surrounding photoreceptors are still fresh and so they send out strong signals that are the same as if we were looking at the opposite colors. The brain then interprets these signals as the opposite colors, essentially creating a full-color image from a negative photo.

According to the opponent process theory of color vision, our perception of color is controlled by two opposing systems: a magenta-green system and a blue-yellow system. For example, the color red serves as an antagonistic to the color green so that when you stare too long at a magenta image you will then see a green afterimage. The magenta color fatigues the magenta photoreceptors so that they produce a weaker signal. Since magenta's opposing color is green, we then interpret the afterimage as green.

How to cut a Round Image and more using word and paint (or powerpoint)

Steps to Crop a Round Shape Using Word and MS Paint

1. Step 1: Open the base image from which you want to crop a circular section. ...
2. Step 2: Open MS Word. ...
3. Step 3: On the MS Word canvas draw the shape with the size that you want. ...
4. Step 4: Keep the shape selected. ...
5. Step 5: Right-click on the shape and select Format AutoShape.
6. Step 4: Keep the shape selected. Drawing Tools will get activated with a Format tab under it. Switch to Format and then choose Shape Fill -> Picture. Choose the picture that you saved in Step 1. Your picture will be inserted and contained flawlessly within the shape.

To get an image a complete round shape easily using Paint and Word. It may not seem like an exact crop activity, but the result is good enough. And then you may save the resulting creation as an independent image or place it over some  background. Let s   go

Steps to Crop a Round Shape Using Word and MS Paint

We are going to use MS Word here. The concept comes from the fact that we can insert images within a shape that we create on MS Word (or even PowerPoint).

Step 1: Open the base image from which you want to crop a circular section. Crop a rectangular section on the area that you visualize for a round crop shape. Save this crop as an independent image. Here’s the sample crop that I saved.

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Step 2: Open MS Word. Navigate to Insert  tab -> Shapes and choose Oval (ellipse).

Step 3: On the MS Word canvas draw the shape with the size that you want. Hold Shiftwhile drawing the shape; it helps to create a perfect circle.

Step 4: Keep the shape selected. Drawing Tools will get activated with a Format tab under it. Switch to Format and then choose Shape Fill -> Picture. Choose the picture that you saved in Step 1. Your picture will be inserted and contained flawlessly within the shape.

Step 5: Right-click on the shape and select Format AutoShape. Our aim here is to remove the shape border.

Step 6: Ensure to be on the Colors and Lines tab. Under Lines section, go to Color and select No Color. Click on Ok when you are done.

Step 7: Right-click on the resulting shape and Copy it on to the clipboard. You may do a Ctrl + C as well.

Step 8: Go back to MS Paint and paste the contents of the clipboard there. You may now save the image.

If you plan to paste this over a different background (other than white) make sure thatTransparent selection is on before you paste the image.

Conclusion

The process may be a little time consuming but it is a foolproof technique to crop a round shape on MS Paint. It may come in handy when you do not have ready accessibility to those top notch tools like Photoshop (as Paint and Word should be there by default).

Besides it is a way to give a perfect round shape to an image. What say? You may try this with other shapes as well. 🙂 Also check out the trick we have covered on cropping and editing images using MS PowerPoint.