Code reading device, method, and program

1. A code reading device comprising:

a reader configured to read information of a code based on a reflection of light from the code attached to an item; and

a processor configured to:

control the reader to irradiate first light on the code attached to the item;

receive a first signal from the reader corresponding to the information of the code based on the reflection of the first light read by the reader;

determine whether the first signal satisfies a first criterion based on a first threshold voltage corresponding to the first light;

based on a determination that the first signal satisfies the first criterion, identify the item without a discount;

based on a determination that the first signal does not satisfies the first criterion:

control the reader to irradiate second light on the code attached to the item;

receive a second signal from the reader corresponding to the information of the code based on the reflection of the second light read by the reader;

determine whether the first signal satisfies a second criterion based on a second threshold voltage corresponding to the second light; and

based on a determination that the second signal satisfies the second criterion, identify the item with the discount, wherein the second light is different from the first light.

2. The code reading device according to claim 1 wherein the processor is further configured to, based on the information of the code, acquire item information indicating whether or not the item is a subject of the discount.

3. The code reading device according to claim 2 ,

wherein the item information indicates whether or not the item is a subject of the discount by at least one of a discount rate, a discount price, and a price after the discount with respect to the item, and

wherein the processor is further configured to identify the discount based on at least one of the discount rate, the discount price, and the price after the discount.

4. The code reading device according to claim 2 ,

wherein the item information indicates whether or not the item is a subject of the discount on a time range basis.

5. The code reading device according to claim 2 ,

wherein the item information indicates whether or not the item is a subject of the discount by at least one of a discount rate, a discount price, and a price after the discount set on a time range basis with respect to the item, and

wherein the processor is further configured to identify the discount based on at least one of the discount rate, the discount price, and the price after the discount when the information of the code is not read by using the first light being irradiated on the code, the information of the code is read by using the second light being irradiated on the code and time of reading the code is included in the time range that is a subject of the discount.

6. The code reading device according to claim 1 , wherein the first light is any one of a red light, a blue light, a green light, and an intermediate color light, and the second light is a white light.

7. The code reading device according to claim 1 , wherein the first light is a first intermediate color light, and the second light is a second intermediate color light that is different from the first intermediate color light.

8. A code reading method comprising:

controlling a reader to irradiate first light on a code attached to an item;

receiving a first signal from the reader corresponding to information of the code based on reflection of the first light;

determining whether the first signal satisfies a first criterion based on a first threshold voltage corresponding to the first light;

based on a determination that the first signal satisfies the first criterion, identifying the item without a discount;

based on a determination that the first signal does not satisfies the first criterion:

controlling the reader to irradiate second light on the code attached to the item;

receiving a second signal from the reader corresponding to the information of the code based on the reflection of the second light read by the reader;

determining whether the first signal satisfies a second criterion based on a second threshold voltage corresponding to the second light; and

based on a determination that the second signal satisfies the second criterion, identifying the item with the discount,

wherein the second light is different from the first light.

9. A non-transitory computer readable storage medium in which a code reading program is stored, the code reading program that causes a computer to perform:

controlling a reader to irradiate first light on a code attached to an item;

receiving a first signal from the reader corresponding to information of the code based on reflection of the first light;

determining whether the first signal satisfies a first criterion based on a first threshold voltage corresponding to the first light;

based on a determination that the first signal satisfies the first criterion, identifying the item without a discount;

based on a determination that the first signal does not satisfies the first criterion:

controlling the reader to irradiate second light on the code attached to the item;

receiving a second signal from the reader corresponding to the information of the code based on the reflection of the second light read by the reader;

determining whether the first signal satisfies a second criterion based on a second threshold voltage corresponding to the second light; and

based on a determination that the second signal satisfies the second criterion, identifying the item with the discount,

wherein the second light is different from the first light.