JP6295452B2 - Crop development support device and program thereof - Google Patents

Description

  The present invention relates to a computer device and a program for supporting crop cultivation that can immediately provide the degree of growth of the crop and the amount of fertilization required when cultivating and growing the crop in a field represented by rice and wheat.

  Fertilization is essential for the supply of nutrients to agricultural crops in the field, but if the amount of fertilizer is too low, it will cause poor growth of the crop, decrease in quality and decrease in yield, resulting in excessive fertilization. Not only can the fertilizer cost be increased unnecessarily, but also the soil quality can be degraded. In other words, accurately grasping the amount of fertilizer application is extremely important, leading to good growth of crops, improvement of quality including taste, maintenance of soil, and optimization of costs, as well as an increase in farmers' income. It is a problem. In order to know the appropriate amount of fertilization, it is necessary to accurately grasp the growth state of the crop.

  Various techniques have been used in the past to use IT technology to grasp the growth state of agricultural products. For example, a method of measuring the amount of protein contained in crops by photographing a farm field from the sky (or from an artificial satellite) is known, but it is necessary to construct a large-scale imaging equipment and system. In rice cultivation, it has been reported that rice growth can be predicted from the plant height, the number of stems, and the leaf color value (SPAD value) measured by a leaf color meter, and the number of rice and the amount of crude protein can be predicted from that value and the amount of panicle. However, it is not practical as a method for widespread use because it requires dedicated and expensive equipment and takes time and effort. In addition, as a simpler method, the farmer transmits an image obtained by photographing the farm field with a camera to the server, determines the growth state of the crop on the server side, and the portable communication that the farmer uses the determination result as the growth information A system for transmitting to a terminal has been proposed (see Patent Document 1).

  In the plant cultivation information processing system disclosed in Patent Document 1, a photograph of a plant to be measured is taken by an information processing terminal such as a mobile phone having a camera function, and the captured image is a computer (server) by a user operation. Sent to. The server performs information processing regarding plant growth information based on the received image, generates growth information and growth diagnosis information data, and distributes the information to a portable information terminal and shares information. In the portable information terminal, the growth information and the growth diagnosis information received from the server are displayed on the screen.

JP 2007-124932 A

  However, in the technique disclosed in Patent Document 1, the image used for information processing such as measurement of the plant cover rate in the server is a spectral image of a plurality of specific wavelengths. It is necessary to mount a terminal and take a plurality of photographs for each different filter, which is troublesome and costly. In addition, it is considered that a considerable load is applied to the server in order to perform processing based on a plurality of spectral images. Above all, the information displayed on the portable information terminal used by the farmer who is the user based on the data generated by the server is plant growth information and growth diagnosis information. Here, from Patent Document 1, it can be understood that the growth information is information indicating the degree of growth of the plant to be measured, but the content of the growth diagnosis information is not specifically disclosed.

  That is, in the system of Patent Document 1, information on how much fertilization should be performed on a plant at that time cannot be obtained. This does not exceed the range of the conventional method in which the farmer who has obtained the information determines fertilization amount based on experience and intuition based on the growth information and growth diagnosis information of the plant. It means that.

  In view of the above problems, the present invention makes effective use of mobile terminals such as smartphones that have been widely spread, and based on the crop image of the field taken with the camera function normally provided in the mobile terminal, The main purpose is to be able to contribute to the growth management of crops, good growth and quality improvement, by immediately displaying the amount of crop growth and the amount of fertilizer required at that time on the screen of the mobile terminal. To do.

The crop cultivation support device of the present invention is configured by a computer device that performs processing for supporting the cultivation of crops that are planted in alignment with a field and are growing. And the basic composition of the crop cultivation support device according to the present invention as hardware is a user standing on a farm using only one type of mobile terminal selected from a smartphone, a tablet terminal or a notebook personal computer. Specify the analysis area to specify the area where image analysis should be performed based on the multiple points specified corresponding to the multiple strains of the crop on the field image taken with the camera function of the mobile terminal from the predetermined height For each pixel in the analysis area, the value obtained by subtracting the red pixel value and the blue pixel value from the double value of the green pixel value is calculated as the luminance value, the vertical axis is the number of pixels, and the horizontal axis is the luminance A histogram generation unit that generates a histogram as a value, and a threshold of a luminance value indicating an area in which the crop is recorded in the analysis area based on the shape of the generated histogram The threshold value determination unit for determining the image and the histogram are divided into a crop specific area having a luminance value equal to or higher than the determined threshold value, and a non-crop area having a luminance value less than the threshold value, and the analysis area image is binarized. Relationship between the binarization processing unit, the planting rate calculation unit that calculates the proportion of the crop specific area in the analysis region as the planting rate of the crop, and the planting rate obtained from the past growth record of the crop and the estimated growth amount Based on the formula, the estimated growth calculation unit that calculates the estimated growth based on the calculated vegetation coverage ratio, and the estimated growth based on the model formula that shows the relationship between the growth and the amount of fertilization obtained from the past growth record of the crop A fertilization amount calculation unit that calculates the fertilization amount for the crop from the amount, and a growth support information output unit that outputs the growth support information including the estimated growth amount and fertilization amount of the crop to the display of the mobile terminal It is a symptom.

Here, the computer device constituting the crop cultivation support device of the present invention may be a server device that receives information transmitted from the mobile terminal, performs information processing, and returns the result to the mobile terminal. It may be a mobile terminal that performs all necessary information processing and display of the results from photographing of the farm products. It should be noted that, when the say that mobile terminal have you in the present invention all, multi-function mobile phones and is commonly referred to as a smart phone, Ru any one der selected from the tablet terminal or small of a notebook personal computer. In the present invention, the mobile terminal may or may not have a telephone function. However, it is indispensable to have a photography function, an image display function, and an execution function of various application software, which is easy for a farmer who is a user. as obtained can be used in, are suitable phone or tablet computer or laptop personal computer.

  In the crop cultivation support device of the present invention, it is premised that a photograph of a crop growing on a field is first taken on a mobile terminal. Photographing is performed by operating a farmer's (user) 's own mobile terminal so that multiple crops are captured in the field. When the captured image is displayed on the screen of the mobile terminal, a point corresponding to a plurality of stocks in the image is designated by the user. In the crop cultivation support device, the analysis region specifying unit specifies the region to be subjected to image analysis based on a plurality of designated points. Here, since the crops to be targeted in the present invention are planted in line with the field, a portion where the crops grow on the average in the field is photographed by the user's own judgment, and the average stock If a plurality of are designated, the subsequent information processing is reflected as an average result for the entire field.

  Next, in the crop cultivation support device, the histogram generation unit subtracts the red pixel value and the blue pixel value from the double value of the green pixel value for each pixel in the analysis region specified by the analysis region specifying unit. A value is calculated as a luminance value, and a histogram is generated with the vertical axis representing the number of pixels and the horizontal axis representing the luminance value. In the calculation of the luminance value, the green pixel value is emphasized as a double value, and the red pixel value and the blue pixel value are subtracted from that value, so that the green color of the crop is predominantly extracted. ing. The histogram generated based on the luminance value reflects the soil and shadow colors of the field in addition to the crop color. Further, the threshold value determination unit analyzes the shape of the generated histogram, and determines the threshold value of the luminance value indicating the area where the crop is recorded in the analysis area.

  Next, in the crop development support device, in the binarization processing unit, based on the threshold value of the luminance value determined, the histogram is used for the crop identification region having a luminance value equal to or higher than the threshold value, and the crop having a luminance value less than the threshold value. The image in the analysis area is binarized by dividing it into an outer area. Then, the vegetation coverage ratio calculation unit calculates the ratio of the crop specific area in the analysis area as the vegetation coverage ratio of the crop. The vegetation coverage here is a ratio of pixels in which crops occupy all pixels in the analysis region of the image, and is a value estimated as a ratio of crops per unit area of the field.

  When the vegetation coverage in the analysis area is obtained, the estimated growth calculation unit calculates the vegetation coverage in the analysis area based on the relational expression between the estimated coverage and the vegetation coverage obtained from the past growth of the crop. The estimated growth is calculated from the vegetation coverage rate. The relationship between the vegetation coverage rate and the estimated growth amount varies depending on the type and variety of the crop, or the region and environment of the field, but can be obtained in advance as a relational expression of a linear function from past growth results. Further, in the crop cultivation support device, when the estimated growth amount is obtained, the fertilization amount calculation unit calculates the crop from the estimated growth amount based on the model formula indicating the relationship between the growth amount and the fertilization amount obtained from the past growth results of the crop. The amount of fertilizer applied to is calculated. The relationship between the amount of growth and the amount of fertilization can also be obtained in advance as a fixed model formula from past growth results for each type and variety of crop, or for each region, environment, and timing of fertilization. In this model formula, it is preferable to set so that a fertilizer amount suitable for the best growth and quality improvement of the target crop can be obtained. Then, the information including the estimated growth amount and the fertilization amount is output to the display of the mobile terminal as the growth support information by the growth support information output unit. Here, when the agricultural product cultivation support device is a server device, the cultivation support device transmits an instruction to transmit the cultivation support information to the mobile terminal that has transmitted the agricultural product on the field and to display the instruction on the display of the mobile terminal. In the case where the crop cultivation support device is a mobile terminal itself, a command to display the cultivation support information on the display of the mobile terminal is output.

  Thus, with the crop cultivation support device of the present invention, a farmer who is a user only takes a picture of a crop on the field using his mobile terminal, and designates a plurality of crops on the screen of the mobile terminal. Thus, the estimated growth amount and fertilization amount of the crop can be immediately grasped. Therefore, the amount of fertilization based on past crop growth results, not experience or intuition, can be known without making the farmer excessively burdensome or cumbersome. Appropriate fertilization can be carried out. As a result, the present invention can optimize the growth of crops and can greatly contribute to the improvement of quality and the income of farmers.

  In the crop cultivation support device of the present invention, the analysis area specifying unit is a total of two strains that are adjacent in the vertical direction and two strains that are adjacent in the horizontal direction among the crops on the field image captured by the camera function of the mobile terminal. A region to be subjected to image analysis can be specified based on a rectangular region formed by four points designated corresponding to the four stocks. In the present invention, because it is intended to support the cultivation of crops planted in a vertical and horizontal alignment in a field, a total of 4 strains of 2 vertical and 2 horizontal strains, preferably 4 strains that are judged to be growing on average. If specified, the area of the region surrounded by the four strains can be easily calculated, and the growth state of the entire field can be accurately grasped.

  In particular, in this case, the analysis region specifying unit specifies a region obtained by doubling a quadrangular region formed by four points corresponding to the designated four stocks in the vertical and horizontal directions as a region for image analysis. If this is the case, it is possible to make the analysis area wider than the case where the quadrilateral formed from four points is set as the analysis area, and to reflect the result of the more appropriate vegetation coverage rate and fertilization rate as a higher determination coefficient. be able to.

  Further, in the threshold value determination unit of the crop cultivation support device, the luminance value on the horizontal axis of the smoothing processing unit that smoothes the histogram generated by the histogram generation unit and the histogram smoothed by the smoothing processing unit It is desirable to include a threshold setting unit that uses a luminance value at a point where the number of pixels increases only after the peak of the first number of pixels from the smaller side as a threshold. In the smoothing processing unit, various known smoothing processes can be applied with respect to the correction of the histogram. For example, in the present invention, for each luminance value indicated on the horizontal axis of the histogram, the movement of five adjacent luminance values is performed. A process of averaging and smoothing can be applied. In the histogram smoothed as described above, the first peak of the number of pixels as viewed from the small side (left side) of the horizontal axis is a peak representing soil and the next peak is a crop according to the present inventors' proof test. It is a peak, and it has been confirmed that a region that is equal to or higher than the luminance value at a point where the number of pixels increases only after the first peak and that includes the second peak is a luminance value that represents a crop. For this reason, it is preferable that the threshold value setting unit sets the luminance value at a point where the number of pixels increases only after the first peak is exceeded as the threshold value.

The basic structure of crop development support program according to the present invention as software, a computer, a software program to be executed as a crop growing support apparatus which performs development assistance crops in the middle growth are planted in alignment in the field, mobile Based on multiple points specified corresponding to multiple crops on the field image taken by the camera function of the mobile terminal from a predetermined height by a user standing on the field using only the terminal An analysis area specifying step for specifying an area to be analyzed, and for each pixel in the analysis area, a value obtained by subtracting a red pixel value and a blue pixel value from a double value of a green pixel value is calculated as a luminance value; Based on the histogram generation step for generating a histogram with the vertical axis representing the number of pixels and the horizontal axis representing the luminance value, and in the analysis area A threshold value determining step for determining a threshold value of a luminance value indicating an area where the crop is recorded, and a histogram is divided into a crop specific area having a brightness value equal to or higher than the threshold value, and a non-crop area having a brightness value lower than the threshold value, A binarization processing step for binarizing the image of the analysis region, a planting rate calculation step for calculating a ratio of the crop specific region in the analysis region as a planting coverage rate, and a vegetation cover obtained from past growth results of the crop An estimated growth amount calculating step for calculating an estimated growth amount from the vegetation cover ratio calculated in the vegetation cover ratio calculating step based on a relational expression between the rate and the estimated growth amount; and a growth amount obtained from a past growth record of the crop A fertilization amount calculating step for calculating a fertilization amount for the crop from the estimated growth amount based on a model formula indicating a relationship between the fertilization amount, and a breeding including the estimated growth amount and the fertilization amount of the crop Is characterized in that the assistance information including the development support information output step of outputting to a display of the mobile terminal. In this crop cultivation support program, the processing content of the step is in accordance with the function of each unit in the above-described crop cultivation support apparatus. The basic configuration of this crop cultivation support program is common to the case where the computer on which the program is installed is a server that can communicate with a mobile terminal and the case where the computer is a mobile terminal.

  Further, in the crop cultivation support program of the present invention, the analysis region specifying step includes two adjacent crops in the vertical direction and two adjacent crops in the vertical direction among the crops on the field image photographed by the camera function of the mobile terminal. Based on a quadrangular area formed by four points designated corresponding to a total of four stocks, a process for specifying a region for image analysis can be performed. Further, the analysis area specifying step can perform a process of specifying an area obtained by doubling a quadrangular area in the vertical direction and the horizontal direction as an area for image analysis.

  Furthermore, in the crop cultivation support program, the threshold value determining step is performed on the horizontal axis for the smoothing processing sub-step for smoothing the histogram generated by the histogram generating unit and the histogram smoothed by the smoothing processing unit. A threshold value setting sub-step in which a luminance value at a point where the number of pixels increases only after exceeding the peak of the first number of pixels from the side where the luminance value is small is set as the threshold value.

  In particular, in a crop cultivation support program that operates a server that can communicate with a mobile terminal used by a farmer who is a user, it receives image data specifying a plurality of points transmitted from the mobile terminal and supports the cultivation It may be configured to further include a first communication step of transmitting the growth support information output in the information output step to the mobile terminal so as to be displayed on the screen of the mobile terminal.

On the other hand, in the case of a software program that executes the mobile terminal that can communicate with a computer that executes a crop cultivation support program, a user standing on the field uses only the mobile terminal to move the mobile terminal from a predetermined height. A shooting instruction step for urging the user to take a picture of the crop on the field by using the camera function, and an image taken in the shooting instruction step is displayed on the display of the mobile terminal, and the plurality of stocks of the crop are designated on the image. A designated crop storage step for storing the image, a designated image storing step for storing an image including points corresponding to a plurality of stocks of the crop designated in the designated crop designation step, and an image stored in the designated image storing step in the computer As well as the first communication step of the computer. A second communication step of receiving development assistance information may be configured to include a screen display step of the screen displaying the development assistance information received on the display of the mobile terminal in the second communication step. Here, in the crop designation instruction step, the crop stock may be designated by a screen touch operation with a user's finger or a pen-type input device (so-called touch pen) on the display of the mobile terminal, or the mouse may be designated. It is also possible to employ input by other input devices such as the above or input by position designation on software.

On the other hand, it is possible to perform all the processes from the photographing of farm products in the field to the screen display of the cultivation support information on the mobile terminal. In this case, the software program of the present invention can be positioned as a crop cultivation support program that is executed as a crop cultivation support device that supports the cultivation of crops that are planted in the field and are growing. Such crop development support program, using only the mobile terminal, a photographing instruction step prompting to shoot a field of crops by the camera function of Karaso predetermined height by a user standing in the field, shooting instruction step The image taken in step 1 is displayed on the display of the mobile terminal, and a crop designation instruction step that prompts the user to designate a plurality of crops on the image, and the plurality of crops designated in the crop designation instruction step A specified image storing step for storing an image including a point corresponding to the image, and image analysis based on a plurality of points specified corresponding to a plurality of crops on the image stored in the specified image storing step. An analysis area specifying step for specifying an area, and for each pixel in the analysis area, a red pixel value and a blue value from twice the green pixel value Based on the histogram generation step that calculates the value obtained by subtracting the prime value as the luminance value, generates a histogram with the number of pixels on the vertical axis and the luminance value on the horizontal axis, and the crop is recorded in the analysis area. A threshold value determining step for determining a threshold value of a luminance value indicating the region, and a histogram is divided into a crop identification region having a luminance value equal to or greater than the threshold value and a non-crop region having a luminance value less than the threshold value, and an image of the analysis region is A binarization processing unit for binarization, a planting rate calculation step for calculating a ratio of the crop specific area in the analysis region as a planting rate of the crop, and a planting rate and an estimated growth amount obtained from the past growth record of the crop Obtained from the estimated growth amount calculating step for calculating the estimated growth amount from the planting rate calculated in the planting rate calculating step and the past growth results of the crops. Based on a model formula indicating the relationship between the amount of cultivation and the amount of fertilization, a mobile terminal is provided with a fertilization amount calculating step for calculating the amount of fertilization to the crop from the estimated amount of growth, and the cultivation support information including the estimated amount of growth and the amount of fertilization of the crop It is possible to include a growth support information output step to be output on the display and a screen display step to display the growth support information output in the growth support information output step on the display of the mobile terminal.

  Even in such a crop development support program that can process all the steps from the field photography to the screen display of the growth support information on the mobile terminal alone, the analysis region specifying step is captured by the camera function of the mobile terminal. An image based on a quadrangular region formed by four points designated corresponding to a total of four strains of two crops adjacent in the vertical direction and two strains adjacent in the horizontal direction among the crops on the image of the farm field. Processing for specifying the region to be analyzed is performed, and further, this analysis region specifying step is performed for specifying a region obtained by doubling the quadrangular region in the vertical and horizontal directions as a region for image analysis. Can be. In addition, the threshold determination step includes a smoothing processing sub-step for smoothing the histogram generated by the histogram generation unit, and a histogram smoothed by the smoothing processing unit. And a threshold value setting sub-step in which a luminance value at a point where the number of pixels increases only after exceeding the peak of the number of pixels is set as the threshold value.

In the present invention, the farmer himself / herself specified a plurality of crops on the photographic image of the crop in the field taken with the camera function of the mobile terminal, which is one of the types selected from a smartphone , a tablet terminal, or a laptop personal computer. Based on the above, the estimated growth amount of the crop can be obtained by image analysis, and the most suitable fertilization amount can be immediately displayed on the screen of the mobile terminal from the estimated growth amount. Therefore, according to the present invention, it is possible to perform the fertilization for crops timely, contribute to the development management and good growth and quality of crops, can be na constant contribute to increase income of farming's it can.

1 is an overview diagram of a crop cultivation support system according to an embodiment of the present invention. The function block diagram of the server and smart phone which comprise the crop cultivation assistance apparatus in the embodiment. The information processing process figure in the embodiment. The figure which shows the initial screen of the smart phone in the embodiment. The figure which shows the example of a screen of the image of the rice of the field after the photography displayed on the display of the smart phone in the embodiment. The figure which shows the example of a screen of the state which has designated the multiple stock | stump | stock with respect to the image of the rice of the field which photographed with the smart phone in the embodiment. The figure which shows the example of a screen of the state which finishes designating the multiple stock with respect to the image of the rice of the field photographed with the smart phone in the embodiment, and transmits to a server. The figure which shows the analysis area | region identified from the image which the server received from the smart phone in the embodiment. The figure which shows the histogram produced with the server in the embodiment. The figure which shows the histogram in which the smoothing process was made | formed by the server in the embodiment. The figure which shows the histogram containing the threshold value set with the server in the embodiment. The figure which shows the binarized image produced and processed with the server in the embodiment. The figure which shows the relationship graph of the vegetation coverage rate and growth which were memorize | stored in the server in the embodiment. The figure which shows the model type | formula which calculates | requires the amount of ear fertilization from the growth amount memorize | stored in the server in the embodiment. The figure which shows the image of the cultivation assistance information displayed on the display of the mobile terminal in the embodiment. The functional block diagram in the case of performing all the processes with a mobile terminal alone as a modification of the embodiment.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the agricultural product support apparatus according to an embodiment of the present invention is a server computer that can communicate with a smartphone 2 that is a type of mobile terminal through the Internet 3, as shown in FIG. 1. (Hereinafter referred to as “server”) 1, and this server 1 constructs a crop cultivation support system X together with the smartphone 2.

  This embodiment is constructed as a crop cultivation support system X that supports the cultivation of Koshihikari, which is a variety of rice R, as a crop in a field (paddy field). In order to construct System X, Koshihikari (hereinafter referred to as “rice” unless otherwise required) was actually cultivated in a test paddy field within the Agricultural and Forestry Center of Kyoto Prefectural Agriculture, Forestry and Fisheries Technology Center. We use past cultivation results in Japan. There are two types of fertilization for rice: basic fertilizer and supplementary fertilizer. Basic fertilization is to apply fertilizer to the soil before accepting rice seedlings, and supplementary fertilization is to apply fertilizer during the growth process of rice. In particular, in the case of rice cultivation, the amount of fertilizer is an important factor affecting the yield, quality and taste of rice. Traditionally, the amount of pantilization is determined by the farmer's experience and intuition on the growth amount of rice at the panicle differentiation stage, and the amount is determined, but this embodiment is for making rice more efficient, It aims at providing the method which can judge based on an objective parameter | index not only for a conventional farmer but a new farmer. The first supplementary fertilization is performed according to the amount of rice growing in the panicle differentiation stage as described above for the purpose of securing a large number of pods, and the second supplementary fertilization is for the purpose of enriching rice grains. This is performed about 10 days after the first supplemental fertilization. However, in order to prevent deterioration in appearance quality due to rice nitrogen deficiency, the second supplemental fertilization is often performed only in a fixed amount per unit area. Therefore, in this embodiment, the amount of fertilization is the first. It is supposed to provide the farmer who is the user U.

  The server 1 includes a CPU (Central Processing Unit), a memory, a storage device, a communication device that can communicate with a client device (in this embodiment, a smartphone 2 used by each user) via the Internet 3, and displays a display as necessary. And a general server computer having a display device, an input device, a database, and the like. A software program (a crop cultivation support program) for operating the server 1 as a crop cultivation support device is installed in a storage device in the server 1, and is read and executed as appropriate in a memory.

  The smartphone 2 is a so-called multi-function mobile phone capable of executing various types of application software in addition to a telephone function, a camera function, an Internet communication function through an appropriate base station, and is one of mobile terminals in the present embodiment. It is used while communicating with the server 1 through the Internet 3. The smartphone 2 includes a CPU (Central Processing Unit), a memory, a storage device, a communication device through the Internet 3, a display, an input device by a touch operation on the display, and the like. Application software (terminal-side crop cultivation support program) for the smartphone 2 for configuring the crop cultivation support system X together with the server 1 is installed in the storage device in the smartphone 2, and is read and executed as appropriate in the memory. The In addition, in this embodiment, although the smart phone 2 assumes what the farmer who is the user U owns individually, it is lent or provided to the user U as an exclusive item of the crop cultivation support system X, Also good.

  As illustrated in FIG. 2, the server 1 executes the crop cultivation support program, thereby performing a communication unit 11, an analysis region specifying unit 12, a histogram generation unit 13, a threshold determination unit 14, a binarization processing unit 15, and a vegetation coverage rate. The function of each part of the calculation part 16, the estimated growth amount calculation part 17, the fertilization amount calculation part 18, and the cultivation assistance information output part 19 is exhibited. The threshold determination unit 14 includes a smoothing processing unit 141 and a threshold setting unit 142. Further, the smartphone 2 executes functions of the terminal-side crop cultivation support program so that the functions of the communication unit 21, the shooting instruction unit 22, the shooting unit 23, the crop designation instruction unit 24, the designated image storage unit 25, and the screen display unit 26 are performed. Demonstrate.

  Hereinafter, each function in the server 1 and the smartphone 2 will be described. In the server 1, the communication unit 11 receives information including a photographic image of rice transmitted from the smartphone 2 through the Internet 3, and transmits the growth support information output by the growth support information output unit 19 to the smartphone 2 through the Internet 3. Information communication is performed.

  The analysis area specifying unit 12 includes the image received by the communication unit 11, specifically, the camera image in which the rice R of the paddy field F is captured by the smartphone 2, and the plurality of rice R specified in the camera image. A region to be image-analyzed is specified based on information including position information in the image of the corresponding point. In the present embodiment, as will be described later, the user U designates a total of 4 stocks of 2 stocks in the vertical direction and 2 stocks in the lateral direction, and therefore, the analysis region is specified based on the quadrangle formed by the four stocks. More specifically, in this embodiment, an area obtained by doubling the vertical and horizontal dimensions of a quadrilateral on an image formed by four strains is specified as an analysis area. In paddy field F, rice R is planted in line with each other at regular intervals in the vertical and horizontal directions, so the 4 points formed by the designated 4 strains (2 vertical and 2 horizontal) are square. Or the corner | angular of a rectangle is formed and the area (area on an image and a paddy field) can also be calculated naturally. Therefore, the analysis area obtained by doubling the length and width of each of the four points is also a square or a rectangle with a specified area.

  For each pixel (pixel) in the analysis region specified by the analysis region specifying unit 12, the histogram generation unit 13 calculates a red pixel value (R) and a blue pixel value (from the double value of the green pixel value (G)). A value obtained by subtracting R) (obtained by the arithmetic expression “2G-RB”) is calculated as a luminance value, and a histogram is generated with the vertical axis representing the number of pixels and the horizontal axis representing the luminance value. Further, the threshold value determination unit 14 analyzes the shape of the generated histogram and determines a threshold value of a luminance value indicating an area where the crop is recorded in the analysis area. Specifically, first, the smoothing processing unit 141 smoothes the shape of the histogram by taking a moving average of a total of five luminance values including the luminance values adjacent to each luminance value for each luminance value. In the smoothed histogram, the first peak seen from the left side (low brightness value) from the preliminary test is the peak representing the soil in the photographed image, and the second peak is the rice leaf. It is known that there is a portion representing a shadow between the two peaks. Therefore, the threshold value setting unit 142 sets a point where the first peak from the left side of the histogram is exceeded and the number of pixels starts to increase again as a threshold value that determines whether the region represents rice in the image.

  In the above histogram, the binarization processing unit 15 sets a region having a luminance value equal to or higher than a threshold value as a crop specific region (in this embodiment, “rice specific region”), and sets a region having a luminance value lower than the threshold value as a region outside the crop (outside rice). Area = soil and shadow area), and the image in the analysis area is binarized so that the rice specific area is white and the soil and shadow area is black. The vegetation coverage rate calculation unit 16 calculates the ratio of the number of pixels in the rice specific region in the total number of pixels in the analysis region as the vegetation coverage rate of rice. The obtained vegetation coverage is the ratio of the pixels in which rice is captured in all the pixels in the analysis area of the image, and is estimated as the ratio of rice in the analysis area and per unit area of the target paddy field It becomes.

  The estimated growth amount calculation unit 17 calculates the estimated growth amount from the calculated vegetation cover rate based on the relational expression between the vegetation cover rate and the estimated growth amount. This relational expression is created in advance from the relationship between the vegetation coverage obtained from the past growth record of rice R of the same variety (Koshihikari) in the target paddy field F and the estimated growth amount. Specific relational expressions will be described later.

  The fertilization amount calculation unit 18 calculates the first ear fertilization amount from the obtained estimated growth amount (hereinafter, “fertilization amount” is rephrased as “first ear fertilization amount” as necessary. The term “ear fertilizer amount” means “first ear fertilizer amount”). The relationship between the growth amount of rice R of the same varieties (Koshihikari) in the target paddy field F and the first ear fertilization amount is specified by a model formula created based on the past growth results, and the fertilization amount calculation unit 18 Uses this model formula to calculate a suitable amount of panicle for growing rice R with high quality. A specific model formula will be described later. Then, the growth support information output unit 19 issues a command to output the information including the obtained estimated growth amount and fertilization amount on the display of the smartphone 2 as the growth support information. This command is transmitted by the communication unit 11 to the original smartphone 2 that has transmitted the photographic image of rice.

  On the other hand, in the smartphone 2, the communication unit 21 transmits information including a photographic image of rice to the server 1 through the Internet 3, and receives the growth support information transmitted from the server 1 to the smartphone 2 through the Internet 3. I do.

  When the terminal-side crop cultivation support program installed in the smartphone 2 is activated by the user U, the imaging instruction unit 22 activates the camera function of the smartphone 2 and photographs the rice R of the paddy field F on the user U. Prompt. As shown in the left side of FIG. 1, it is preferable for the user U to take a picture from a height of about 70 cm from the upper end of the rice R while the user U is substantially horizontal in the paddy field. In consideration of the size of rice at the time of the first fertilization, this is a distance of about 70 cm that is suitable for photographing 4 or more (about 6 to 8) areas with the smartphone 2 camera. This is based on the knowledge obtained from the preliminary test. Note that a message that prompts the user to hold the smartphone 2 at a position about 70 cm above the average growing rice and take a picture may be displayed on the screen when the terminal-side crop cultivation support program is activated. Subsequently, the photographing unit 23 operates the camera function of the smartphone 2 and photographs the rice R of the paddy field by the shutter operation by the user U.

  The crop designation instruction unit 24 displays the photographic image photographed by the photographing unit 23 on the screen of the smartphone 2 and prompts the user U to designate four rice plants (two vertical and two horizontal) in the image. In this way, a message that prompts the user to designate points corresponding to the four stocks by sequentially tapping on the display of the smartphone 2 may be displayed on the screen. When four points corresponding to the four stocks are designated, the designated image storage unit 25 stores the position information of the four points together with the photographic image. Then, the stored information is transmitted to the server 1 by the communication unit 21 or automatically by the user U.

  The screen display unit 26 displays the development support information received from the communication unit 21 on the screen of the smartphone 2. The displayed information includes the estimated growth amount of rice R in paddy field F taken by the user U and the appropriate amount of panicle.

  The server 1 and the smartphone 2 can configure the crop cultivation support system X in a one-to-many relationship. In this case, each smartphone 2 is given a unique identifier, and the past growth results accumulated for each identifier from the database provided on the server 1 side are used, or newly generated breeding support information is accumulated. It is possible to use different relational expressions and model expressions for individual users U. Alternatively, the identifier of each smartphone 2 is linked to information on a plurality of types (or a plurality of types) of crops and fields cultivated by the user U of the smartphone 2 in the database. When transmitting a photographic image to the server 1, if the type, variety, transplanting date (or sowing date), or field of the crop is designated, the server 1 may be able to use the corresponding information. In particular, regarding the farm field, if the position information of the smartphone 2 is automatically transmitted from the smartphone 2 to the server 1, the farm field may be specified on the server 1 side.

  Next, the flow of information processing by the crop cultivation support program installed in the server 1 and the terminal side crop cultivation support program installed in the smartphone 2 will be described with reference to the information processing step diagram of FIG. First, the user U activates an icon IC indicating a terminal-side crop cultivation support program (application program, hereinafter abbreviated as “application”) on the screen P1 of the smartphone 2 by a tap operation (St21 (hereinafter, each processing step is described below). Indicated by the symbol St))). Here, FIG. 4 shows a screen example when the program is started. The program is displayed together with an icon IC as a name “Rice Cam” application. According to the program of the application, the smartphone 2 causes the shooting instruction unit 22 to operate the camera function of the smartphone 2 (St22), causes the user U to perform an operation of shooting the rice R of the paddy field F, and the shooting unit 23 takes a picture. (St23), and the captured image of rice R is displayed on the screen (St24). The rice image displayed on the screen is shown in FIG. Then, the crop designation instruction unit 24 prompts the user U to designate a plurality of stocks (4 stocks) on the image on the screen by a touch operation (St25). On the other hand, the user U selects an appropriate stock and designates four points corresponding to the four stocks sequentially by touching the screen, but the designated point m is input as position information on the image. The application receives an input of 4 points m (St26). The input point m is displayed as an “x” mark in the screen example shown in FIG. Also, until all 4 points m are input by touch operation, touch 4 shares on the image to a part of the screen (lower end in the example) as shown in the screen example in the figure. A message urging the user U to specify may be displayed. When all four points m corresponding to the four stocks have been input, a message (in the example shown in FIG. 7, “OK” at the bottom of the screen) is displayed for the user U to determine completion of input. When “OK” is touched, the designated image storage unit 25 stores the position information of 4 points m together with the rice R image (St27), and the transmission unit 21 includes the position information of 4 points m. The image data is transmitted to the server 1 (St28).

  In the server 1, an agricultural product cultivation support program (hereinafter abbreviated as “program”) is running, and first, the communication unit 11 receives image data transmitted from the smartphone 2 (St 11). The received image data includes a total of four point m positions specified by two specified vertical and horizontal points, and the server 1 uses the analysis area specifying unit 12 to make a rectangular shape obtained by doubling the vertical and horizontal directions of the four points. An area is specified as an analysis area (St12). Regardless of whether it is displayed on the display connected to the server 1, an example in which the analysis region ROI specified in the server 1 is displayed as an image is shown in FIG. Next, the server 1 uses the histogram generation unit 13 to subtract the red pixel value (R) and the blue pixel value (R) from the double value of the green pixel value (G) for each pixel (pixel) in the analysis region ROI. The calculated value (calculation expression “2G-RB”) is calculated as a luminance value (St13), and a histogram H1 in the analysis region ROI having the vertical axis as the number of pixels and the horizontal axis as the luminance value is generated (St14). An example of the generated histogram H1 is shown in FIG. Subsequently, in the server 1, the threshold value determination unit 14 determines the threshold value t of the luminance value based on the shape of the histogram H1 (St15). When determining the threshold value t, first, the smoothing processing unit 141 performs a smoothing process on each luminance value of the histogram H1 by phase-averaging the values of the number of pixels with respect to five adjacent luminance values (St151). An example of the smoothed histogram H2 is shown in FIG. Further, the threshold setting unit 142 analyzes the shape of the smoothed histogram H2, identifies the point B where the value of the number of pixels starts to increase beyond the first peak A from the left side, and corresponds to this point B. The luminance value is set as the threshold value t (St152).

  As shown in the histogram H <b> 3 in FIG. 11, a region having a luminance value equal to or greater than the threshold value t and including the second peak C from the left is classified as a rice specific region, and a region having a luminance value less than the threshold value t is classified as a non-rice region. Therefore, the server 1 binarizes the analysis region ROI by using the binarization processing unit 15 with the rice specific region being white and the non-rice region being black (St16). FIG. 12 shows an example in which the binarized analysis region ROI is displayed as an image. Furthermore, the ratio of the number of pixels in the rice specific region (white) in the total number of pixels in the analysis region ROI is calculated as the planting rate by the planting rate calculation unit 16 (St17).

Here, a graph as shown in FIG. 13 is obtained for the relationship between the planting coverage of rice (in this embodiment, Koshihikari in the target paddy field) and the growth amount (actual growth amount) based on the accumulation of past growth results. Based on this graph, the relational expression “y = 311.23x−71.561” (x is the planting rate, y is the estimated growth rate, and the determination coefficient R ² is 0.8882, which is good, based on this graph. Value). In the server 1, at least the estimated growth amount calculation unit 17 is programmed with this relational expression, or a graph as shown in FIG. Therefore, the server 1 gives the planting rate obtained in the previous processing step (St17) to this relational expression, and calculates the estimated growth amount of rice in the analysis region ROI (St18).

  Further, the relationship between the amount of panicle fertilizer according to the amount of rice grown is based on the accumulation of past growth results, and a model formula as shown in FIG. 14 is obtained. A suitable ear fertilizer amount (first ear fertilizer amount) is calculated from the estimated growth amount obtained in the previous processing step (St19). In calculating the specific panicle fertilizer amount, first, when the estimated growth amount is substituted into X in model formula 4, the above-ground nitrogen content Y is calculated. Next, when the above-ground nitrogen content obtained by model formula 4 is substituted for X of model formula 1, the number Y of differentiated spikelets of rice is calculated. Further, a target number (for example, a value determined from this range when 29 thousand or more and 33,000 or less is targeted) is substituted for Y of model formula 2, and the differentiated wrinkle obtained by model formula 1 is substituted for X1. By substituting the number of flowers, the first panicle nitrogen amount X2 is obtained. Then, in model formula 3, a target protein value (for example, a numerical value determined from this range when the target value of the crude rice protein content is 6.0% or more and 6.5% or less) is substituted for Y, and X1 Substituting the value obtained by dividing the number of differentiated spikelets obtained in model formula 1 by the number of spikelets obtained in model formula 2 yields the total panicle nitrogen amount X2. A value obtained by subtracting the second panicle nitrogen amount (for example, a fixed value 1.6 Kg / 10a) is obtained as the first panicle fertilizer amount (the panicle nitrogen amount).

  The server 1 instructs the growth support information output unit 19 to output information including the estimated growth amount and fertilization amount obtained in the previous processing step (St18, St19) on the display of the smartphone 2 as the growth support information. This is output (St110), and this command is transmitted by the communication unit 11 to the original smartphone 2 that has transmitted the rice photographic image (St111). In the smartphone 2, the command transmitted from the server 1 is received by the communication unit 21 (St29), and the screen display unit 26 displays the breeding support information on the display (St210). FIG. 15 shows an example of a screen P5 on which the growth support information is displayed as “diagnosis result” on the display of the smartphone 2. In the screen shown in the figure, as the growth support information I, the estimated growth amount (expressed as “growth amount”) Ia is 70.2, and the panicle fertilizer amount (the first panicle nitrogen amount) Ib is 1.6 kg / In addition to the information 10a, related information Ic is displayed, and an example in which the user U is provided is shown. In this example, the related information Ic is converted into an application amount of a common fertilizer (for example, trade names “NKC-12”, “Hoju 484”). The numerical values that have been set are also displayed.

  In the demonstration test of this crop cultivation support system X, it was a short time of several seconds from when the image of rice was transmitted from the smartphone 2 to the server 1 until the cultivation support information was displayed. Even if the application is started on the smartphone 2, the rice R is photographed in the paddy field F, and the time for specifying the four stocks is taken into consideration, the growth state of the rice R in the paddy field F and the desirable ear are required. You can grasp the fertilizer. Thereby, if this embodiment is utilized, it will become possible for a farmer to grasp | ascertain an appropriate amount of ear fertilization immediately and to fertilize quickly, while staying in a paddy field. Therefore, rice can be properly cultivated and high-quality rice harvest can be expected without relying on experience and intuition, which can contribute to increasing farmers' income, and helps inexperienced farmers Can also be provided as a very useful tool.

  Note that the present invention is not limited to the above-described embodiment. For example, it is possible to perform all processing on the smartphone 2 without communicating with the server 1. In that case, as a crop cultivation support program (application program) installed in the smartphone 2, all the functions except the server 1 and the communication units 11 and 21 of the smartphone 2, that is, as shown in FIG. Imaging instruction unit 201, imaging unit 202, crop designation instruction unit 203, designated image storage unit 204, analysis region specifying unit 205, histogram generation unit 206, threshold value determination unit 207 (smoothing processing unit 2071, threshold value setting unit 2072), two What is necessary is just to make it include the process process which functions as the value processing part 208, the planting rate calculation part 209, the estimated growth amount calculation part 210, the fertilization amount calculation part 211, the growth support information output part 212, and the screen display part 213. The function of each part is equivalent to the function of each part in the above-described embodiment having the same name.

  In the above embodiment, the rice breeding support system X of the specific variety (Koshihikari) in the target paddy field has been described. However, the crop cultivation support device and the program thereof according to the present invention are applied to other fields, other varieties, and other crops. The system may be applied, and the relational expression for calculating the estimated growth amount and the model expression for calculating the fertilization amount may be appropriately changed according to the application target. As described above, the present invention can be modified as appropriate without departing from the spirit of the present invention other than the above-described embodiment.

The present invention relates to experience and intuition by utilizing a mobile terminal that is one of a wide variety of smartphones , tablet terminals, and notebook personal computers that are widely used for the cultivation of crops in fields such as rice farming. By providing the farmers with the growth status and the amount of fertilization required, they can be used for stable cultivation and quality improvement of crops.

1 ... Server (agricultural crop cultivation support device)
2. Smartphone (mobile terminal)
DESCRIPTION OF SYMBOLS 12 ... Analysis area | region specific part 13 ... Histogram generation part 14 ... Threshold value determination part 141 ... Smoothing process part 142 ... Threshold value setting part 15 ... Binarization process part 16 ... Planting rate calculation part 17 ... Estimated growth amount calculation part 18 ... Fertilization Amount calculation unit 19 ... Growth support information output unit 22 ... Shooting instruction unit 23 ... Shooting unit 24 ... Agricultural product designation instruction unit 25 ... Specified image storage unit 26 ... Screen display unit F ... Paddy field (field)
R ... Rice (crop)

Claims (14)

A crop growth support device configured by a computer device that performs processing for supporting the cultivation of crops that are planted in line with the farm and are growing.
Using only a mobile terminal selected from a smartphone, a tablet terminal, or a laptop personal computer, the field of the field imaged by the camera function of the mobile terminal from a predetermined height by a user standing in the field Based on a plurality of points designated corresponding to a plurality of the crops on the image, an analysis region specifying unit for specifying a region to be subjected to image analysis,
For each pixel in the analysis area, a value obtained by subtracting the red pixel value and the blue pixel value from the double value of the green pixel value is calculated as a luminance value, the vertical axis is the number of pixels, and the horizontal axis is the luminance value. A histogram generator for generating a histogram;
Based on the shape of the histogram, a threshold value determination unit that determines a threshold value of a luminance value indicating an area in which the crop is recorded in the analysis area;
A binarization processing unit that divides the histogram into a crop specific region that has a luminance value equal to or higher than the threshold and a crop outside region that has a luminance value lower than the threshold, and binarizes the image of the analysis region;
A vegetation rate calculating unit for calculating a ratio of the crop specific region in the analysis region as a vegetation coverage rate of the crop;
Based on the relational expression between the vegetation coverage and the estimated growth obtained from the past growth record of the crop, an estimated growth calculation unit that calculates the estimated growth from the vegetation coverage calculated by the vegetation coverage calculation unit;
Based on a model formula indicating the relationship between the amount of growth and the amount of fertilization obtained from the past growth record of the crop, a fertilization amount calculation unit that calculates the fertilization amount for the crop from the estimated growth amount;
A crop growth support apparatus, comprising: a growth support information output unit that outputs the growth support information including the estimated growth amount and the fertilization amount of the crop to the display of the mobile terminal. The analysis area specifying unit corresponds to a total of four shares of two crops adjacent in the vertical direction and two strains adjacent in the horizontal direction among the crops on the field image captured by the camera function of the mobile terminal. The crop cultivation support device according to claim 1, wherein a region to be subjected to image analysis is specified based on a quadrangular region formed by four points specified in the above. The crop cultivation support device according to claim 2, wherein the analysis region specifying unit specifies a region obtained by doubling the quadrangular region in the vertical direction and the horizontal direction as a region for performing image analysis. The threshold value determination unit is a smoothing processing unit that smoothes the histogram generated by the histogram generation unit;
About the histogram smoothed by the smoothing processing unit, a threshold value setting unit that uses the luminance value at the point where the number of pixels first increases after exceeding the peak of the first number of pixels from the side where the luminance value on the horizontal axis is small as the threshold value; The crop cultivation support device according to any one of claims 1 to 3, further comprising: A computer program that executes a computer as a crop cultivation support device that supports cultivation of a crop that is planted in line with a farm and is growing.
Using only a mobile terminal that is selected from one of a smartphone, a tablet terminal, and a notebook personal computer , and taken by the user standing in the field with a camera function of the mobile terminal mobile terminal from a predetermined height An analysis region specifying step for specifying a region to be subjected to image analysis based on a plurality of points designated corresponding to a plurality of stocks of the crop on a field image;
For each pixel in the analysis area, a value obtained by subtracting the red pixel value and the blue pixel value from the double value of the green pixel value is calculated as a luminance value, the vertical axis is the number of pixels, and the horizontal axis is the luminance value. A histogram generation step for generating a histogram;
A threshold value determining step for determining a threshold value of a luminance value indicating an area in which the crop is recorded in the analysis area based on the shape of the histogram;
A binarization processing step for dividing the histogram into a crop specific region having a luminance value equal to or higher than the threshold and a crop outside region having a luminance value lower than the threshold, and binarizing the image of the analysis region;
A vegetation cover ratio calculating step of calculating a ratio of the crop specific area in the analysis area as a vegetation cover ratio of the crop;
Based on the relational expression between the vegetation cover rate obtained from the past growth record of the crop and the estimated growth amount, an estimated growth amount calculating step for calculating the estimated growth amount from the vegetation cover ratio calculated in the vegetation cover rate calculating step;
Based on a model formula showing the relationship between the amount of growth and the amount of fertilization obtained from the past growth record of the crop, a fertilization amount calculating step for calculating the fertilization amount for the crop from the estimated growth amount;
A crop cultivation support program, comprising: a cultivation support information output step for outputting the cultivation support information including the estimated growth amount and the fertilization amount of the crop on a display of the mobile terminal. The analysis region specifying step corresponds to a total of four stocks of two crops adjacent in the vertical direction and two strains adjacent in the horizontal direction among the crops on the field image taken by the camera function of the mobile terminal. The crop cultivation support program according to claim 5, wherein processing for specifying a region to be subjected to image analysis is performed based on a quadrangular region formed by four points designated in the above. The crop cultivation support program according to claim 6, wherein the analysis region specifying step performs a process of specifying a region obtained by doubling the quadrangular region in the vertical direction and the horizontal direction as a region for image analysis. The threshold value determining step includes a smoothing processing sub-step for smoothing the histogram generated by the histogram generation unit;
For the histogram smoothed by the smoothing processing unit, a threshold value setting sub-step in which the threshold value is the luminance value at which the number of pixels first increases after exceeding the peak of the first pixel number from the side where the luminance value on the horizontal axis is small The crop cultivation support program according to any one of claims 5 to 7. The mobile terminal is configured to receive the image data designated by the plurality of points transmitted from the mobile terminal and to display the training support information output in the training support information output step on a screen of the mobile terminal. The crop cultivation support program according to any one of claims 5 to 8, further comprising a first communication step to be transmitted to. A software program for executing the mobile terminal capable of information communication with a computer executing the crop cultivation support program according to claim 9,
An imaging instruction step that uses only the mobile terminal and urges a user standing on the field to shoot crops in the field by a camera function of the mobile terminal from a predetermined height ;
A crop designation instruction step for causing the image taken in the photographing instruction step to be displayed on the display of the mobile terminal and for urging to designate the plurality of stocks of the crop on the image;
A designated image storage step for storing an image including points corresponding to a plurality of stocks of the crop designated in the crop designation instruction step;
A second communication step of transmitting the image stored in the designated image storage step to the computer and receiving the training support information output by the first communication step of the computer;
A terminal-side crop cultivation support program comprising: a screen display step for causing the mobile terminal display to display the cultivation support information received in the second communication step. A software program that executes a mobile terminal, which is one of a smartphone, a tablet terminal, and a notebook personal computer, as a crop cultivation support device that supports cultivation of crops that are planted in the field and are growing. And
An imaging instruction step that uses only the mobile terminal and urges a user standing on the field to shoot crops in the field by a camera function of the mobile terminal from a predetermined height ;
A crop designation instruction step for causing the image taken in the photographing instruction step to be displayed on the display of the mobile terminal and for urging to designate the plurality of stocks of the crop on the image;
A designated image storage step for storing an image including points corresponding to a plurality of stocks of the crop designated in the crop designation instruction step;
On the image stored in the designated image storage step, based on a plurality of points designated corresponding to a plurality of stocks of the crop, an analysis region identifying step for identifying a region to be subjected to image analysis,
For each pixel in the analysis area, a value obtained by subtracting the red pixel value and the blue pixel value from the double value of the green pixel value is calculated as a luminance value, the vertical axis is the number of pixels, and the horizontal axis is the luminance value. A histogram generation step for generating a histogram;
A threshold value determining step for determining a threshold value of a luminance value indicating an area in which the crop is recorded in the analysis area based on the shape of the histogram;
A binarization processing unit that divides the histogram into a crop specific region that has a luminance value equal to or higher than the threshold and a crop outside region that has a luminance value lower than the threshold, and binarizes the image of the analysis region;
A vegetation cover ratio calculating step of calculating a ratio of the crop specific area in the analysis area as a vegetation cover ratio of the crop;
Based on the relational expression between the vegetation cover rate obtained from the past growth record of the crop and the estimated growth amount, an estimated growth amount calculating step for calculating the estimated growth amount from the vegetation cover ratio calculated in the vegetation cover rate calculating step;
Based on a model formula showing the relationship between the amount of growth and the amount of fertilization obtained from the past growth record of the crop, a fertilization amount calculating step for calculating the fertilization amount for the crop from the estimated growth amount;
A growth support information output step for outputting the growth support information including the estimated growth amount and the fertilization amount of the crop to the display of the mobile terminal,
And a screen display step for displaying the growth support information output in the growth support information output step on a display of the mobile terminal. The analysis region specifying step corresponds to a total of four stocks of two crops adjacent in the vertical direction and two strains adjacent in the horizontal direction among the crops on the field image taken by the camera function of the mobile terminal. The crop cultivation support program according to claim 11, wherein a process for specifying a region to be subjected to image analysis is performed based on a quadrangular region formed by four points designated in the above. 13. The crop cultivation support program according to claim 12, wherein the analysis region specifying step performs a process of specifying a region obtained by doubling the quadrangular region in the vertical direction and the horizontal direction as a region for image analysis. The threshold value determining step includes a smoothing processing sub-step for smoothing the histogram generated by the histogram generation unit;
For the histogram smoothed by the smoothing processing unit, a threshold value setting sub-step in which the threshold value is the luminance value at which the number of pixels first increases after exceeding the peak of the first pixel number from the side where the luminance value on the horizontal axis is small The crop cultivation support program according to any one of claims 11 to 13, comprising:

Images