If the amount of moisture in the skin is insufficient, the oil and moisture balance will collapse. The skin becomes rough and weak in elasticity and vitality, which can cause sensitive skin, especially as the skin recovers slowly, which is a major cause of aging. Moisture is segmented by the moisture value measured through the water sensor of the diagnostic device, then calibrated to possible deviations from device to device, and the result is calculated using a series of expressions.
Moisture
Oilness
Excess oil occurs in the sebum glands of the skin that produce sebum. People in this condition generally have glowing skin and large pores. Oil is collected using sebum paper, analyzed by a diagnostic device, or analyzed by using a cross mask to distinguish areas with a higher gray intensity value than other areas. The detected area is selected as the top 2% brightness pixel.
Wrinkle
Wrinkle is a natural phenomenon of aging and refers to cracking, folding, or bending of the skin. As you are exposed to ultraviolet rays, elasticity decreases, or wrinkles increase as your skin dries as elastin and collagen degenerate. Like pores, wrinkles are observed relatively darker than the surroundings. Use VSL to detect the depth of wrinkles and then remove body hair in a similar way. The main components of a wrinkle are length and depth, so it is considered a wrinkle only if the length is above a fixed value. Use the S-channel value of the HSL color space similar to the actual depth. Finally, for each area defined as a wrinkle, the length of the wrinkle is multiplied by the average depth value and divided by the image size value to calculate the wrinkle index.
Pores
Pores are the entrance to the hair follicle visible on the surface of the skin, and sebaceous glands that can be seen prominently in places where sebaceous glands are developed, such as forehead and nose. The size of pores may look larger when the amount of sebum on the skin surface secreted by the sebum glands connected to the hair follicles increases, sebum and impurities accumulate inside the pores, or the pore walls droop and stretch due to reduced elasticity caused by skin aging. This separates small, sagging, or connected pores with a morphology opening method, and uses VSL to detect the depth of the pores. In particular, pore values are calculated by multiplying the two values and dividing them by the size of the image per pixel, because depth and size are important.
Impurities
The sebum is covered with sebaceous glands and connected to pores. It is a kind of bacterial secretion that acts as a natural moisturizing cream mixed with sweat to prevent excessive moisture loss, but when secreted above a certain level, it blocks pores and causes skin problems. Popyrins appearing in the sebum are detected as scarlet light in response to UVL in a specific wavelength range, and in addition, they are also detected together with yellow and green light blocking the pores, applying a series of expressions to the image size to calculate the index.
Dead Skin
Keratin is a type of fibrous protein and the outer layer of the skin consists mainly of this protein. Sometimes when this protein is produced, the body malfunctions and builds up under the hair follicles near the top layer of the skin. Then create a plug that comes up to the surface. The plug appears as a small, rough dot and is also known as a pilaris keratosis in white or red. Attach keratin tape to the skin surface and detect and measure keratin based on the amount of keratin on the tape.
Spots and Blemishes
Stain and blemishes are caused by the production of more melanin than usual in some areas of the skin when exposed to sunlight or artificially using tanning machines. This is also associated with skin conditions, and can sometimes be caused by side effects of drugs. For freckles or blemishes, they are calculated as brightness values. We give the first weight according to the degree of darkness, and we give the second weight to the degree of darkness around. The index is calculated by combining the two and then dividing them by the image size value.
Pigmentation
Pigmentation is mainly caused by increased melanin pigments or skin infections or scars as the skin is exposed to ultraviolet rays. Generally, image analysis under visible light makes it difficult to detect early signs of skin damage and pigmentation caused by ultraviolet rays, so the melanin pigment absorbs ultraviolet rays and uses lighting that emphasizes pigment spots. Darker areas of pigmentation are detected by the brightness value, and only melanin (brown) remains through the detection process. The colouring figures are calculated as brightness values. We give the first weight according to the degree of darkness and the second weight to the degree of darkness about the surroundings. The spot index is calculated by combining the two and then dividing them by the image size value.
It refers to a condition in which the base of the eye looks dark and the base of the eye looks shaded. When melanin pigments are deposited around the eyes for a long time, or subcutaneous veins are exposed due to thin skin under the eyes, fatigue or stress causes blood circulation around the eyes to worsen. A factor that makes a person's face look tired and dull, predicting dark circles in a given image using an AI model trained with a large amount of dark circle data.
Dark Circles
Radiance
Skin glow is a warm glow that is revealed in healthy skin with enough rest and nutrition. It is affected by the reflectivity of skin cells, the smoothness of the skin itself, and uniformity. The VSL detects the glow of the face and displays the glow.
Redness (sensitivity)
There are many causes, but in general, if the skin is exposed to constant irritation, such as sunburn or allergic reactions, excess blood can flock to the skin's surface and burn red to defeat irritants and promote healing. This is called flushing, and medical treatment is also required, especially in severe cases. The redness area is detected by color difference method. The intensity values of the detected areas are different from the surroundings in the R and G color channels of the RGB image, and the redness index is calculated as a combination of the difference and constant values of the two color channels and then divided by the image size values.
Sebum
The fat on the surface of the skin is called sebum, which is a component of oil, is secreted by the sebaceous glands in the skin. The sebum prevents the skin from drying, while also pulling up moisture to neutralize alkali and prevent harmful substances from entering, while delaying skin aging. However, excessive sebum secretion causes the skin of the face to become shiny, using AI algorithms trained based on large amounts of data to check for glitters in a given image.
Dullness
The dullness of the skin is the result of excessive buildup of keratinocytes on the skin's surface. Dryness, accumulation of damaged cells, or slowing cell turnover causes the skin to lose its luster, and AI algorithms learned from large amounts of data identify dullness that is not luster-free and different from the skin's natural tone.
Elasticity
Skin elasticity is the ability of stretched skin to return to its original shape. Decreasing skin elasticity is a natural phenomenon in the aging process, but especially when exposed to ultraviolet rays, the elasticity decreases, elastin and collagen degenerate, making the skin dry and wrinkles increase. Measure skin elasticity using analysis of wrinkles and dullness
Skin Color
The difference in skin color is determined by the amount of melanin that is genetically assigned to the boundary between the epidermis and the dermis. Skin color is calculated by photographing the front of the face, classifying parts by face area, measuring each RGB value, and applying a series of formulas to the RGB value and skin tone RGB value for each extracted area.
