Abstract: An information loss determiner in an image processing device determines whether character collapse has occurred in a simple binarized image. If character collapse has not occurred in the simple binarized image, an image processing determiner selects simple binarization processing as the image processing method of output image data. If character collapse has occurred in the simple binarized image, the process proceeds to photograph area size determination. If the ratio of a photograph area size is less than or equal to a predetermined value, the information loss determiner determines that character collapse has occurred in a posterization processed image. If character collapse has occurred in the posterization processed image, the image processing determiner selects grayscale processing. If character collapse has not occurred in the posterization processed image, the image processing determiner selects posterization processing.

Abstract: A liquid treatment device includes an electron emitting element, a first power supply, and a second power supply. The electron emitting element including a first electrode which is disposed facing water. The first power supply discharges electrons from the first electrode by applying a drive voltage to the electron emitting element. The second power supply applies a collection voltage between the first electrode and the water. The liquid treatment device preferably controls a substance added to the water by controlling the drive voltage.

Abstract: An image processing device includes an image reader that reads an image, a first determiner that determines whether character crushing occurs when the image is binarized, a second determiner that determines a rate of a photographic region in the image, and a controller that performs conversion into monochrome N-gradation image data based on determination results of the first and second determiners.

Abstract: An image processing device includes an image reader that reads an image, a first determiner that determines whether character crushing occurs when the image is binarized, a second determiner that determines a rate of a photographic region in the image, and a controller that performs conversion into monochrome N-gradation image data based on determination results of the first and second determiners.

Abstract: An information loss determiner in an image processing device determines whether character collapse has occurred in a simple binarized image. If character collapse has not occurred in the simple binarized image, an image processing determiner selects simple binarization processing as the image processing method of output image data. If character collapse has occurred in the simple binarized image, the process proceeds to photograph area size determination. If the ratio of a photograph area size is less than or equal to a predetermined value, the information loss determiner determines that character collapse has occurred in a posterization processed image. If character collapse has occurred in the posterization processed image, the image processing determiner selects grayscale processing. If character collapse has not occurred in the posterization processed image, the image processing determiner selects posterization processing.

Abstract: A liquid treatment device includes an electron emitting element, a first power supply; and a second power supply. The electron emitting element including a first electrode which is disposed facing water. The first power supply discharges electrons from the first electrode by applying a drive voltage to the electron emitting element. The second power supply applies a collection voltage between the first electrode and the water. The liquid treatment device preferably controls a substance added to the water by controlling the drive voltage.