Abstract: A product recognition apparatus includes: a storage unit storing in advance, an image database in which image information for learning of a plurality of products and product names are associated with each other and a similar image product name list in which product names of a plurality of products whose appearances are similar to each other are associated with each other, a learning unit generating a machine-learned identification engine; an identification unit identifying a product name using the identification engine; an image management unit storing, when the identification by the identification unit is erroneous, and the identified product name and the correct product name specified by a user are not stored in the similar image product name list, the image information of the target product and the correct product name in the image database.

Abstract: A current/charge-voltage convert circuit having an operational amplifier and a capacitor connected between the input terminal and the output terminal of the operational amplifier, this current/charge-voltage convert circuit characterized in that it comprises a first pair of diodes connected in mutually opposing directions to this input terminal, a second pair of diodes connected in the opposite direction of this first pair of diodes to the respective other terminal of this first pair of diodes, a pair of current sources connected in mutually opposing directions to the respective other terminal of this first pair of diodes, a pair of switches connected to the respective other terminal of this first pair of diodes, and resistors connected between the respective other terminal of this second pair of diodes.

Abstract: A current/charge-voltage convert circuit having an operational amplifier and a capacitor connected between the input terminal and the output terminal of the operational amplifier, this current/charge-voltage convert circuit characterized in that it comprises a first pair of diodes connected in mutually opposing directions to this input terminal, a second pair of diodes connected in the opposite direction of this first pair of diodes to the respective other terminal of this first pair of diodes, a pair of current sources connected in mutually opposing directions to the respective other terminal of this first pair of diodes, a pair of switches connected to the respective other terminal of this first pair of diodes, and resistors connected between the respective other terminal of this second pair of diodes.