Canon Kabushiki Kaisha

Koji Harada

Junichi Hayashi

Masanori Yokoi

Takami Eguchi

Takehiro Yoshida

Hitoshi Saito

Nobuhiro Tagashira

Ayuta Kawazu

Yukihiko Ogata

Hiroyuki Nakanishi

Yasuhiro Nakamoto

Kazuya Kishi

Koji Nishioka

Seijiro Yanase

Asao Watanabe

Kenichi Okihara

Asao Wantanabe

An information processing apparatus holding a secure chip includes a determination unit that determines whether the information processing apparatus returns from an idle state; a detection unit that, if the determination unit determines that the information processing apparatus returns from the idle state, detects initialization of the secure chip before starting application software; and a control unit that, if the detection unit detects the initialization of the secure chip, controls an operation of the information processing apparatus so that a hash value of the application software is not registered in the secure chip that is initialized.

Information processing apparatus and method of controlling the apparatus

An information processing apparatus having a function of entering and returning from a hibernation state and communicable with a server apparatus performing device certification includes a storage unit configured to, in a case where a software module is activated, store a hash value of the activated software module in a volatile memory, a request unit configured to request device certification based on a hash value stored in the volatile memory from the server apparatus, and an excluding unit configured to, in a case where the device certification is requested after returning from the hibernation state, exclude a software module activated before entering the hibernation state from a target of the device certification.

Information processing apparatus, server apparatus, information processing system, control method, and computer program

This invention can generate printed matter on which a multi-valued discrimination image of three values or more cannot be visually confirmed under ordinary light but can be visually confirmed via an infrared camera under infrared light. To this end, a holding unit holds items of color information C, C, and Ceach indicating usage amounts of printing materials of three types, used by a printing apparatus, which have a color difference under visible light not more than a pre-set threshold, and which have different infrared light ray absorption rates. When a latent image generating unit generates infrared light ray latent image data of three tones, a discrimination image data generating unit decides one color information item Ci (1&#x2266;i&#x2266;3) held by the holding unit, and outputs the decided Ci to an output unit which outputs the received pixel values to the printing apparatus.

Image processing apparatus and control method thereof printing image data having M tones under infrared light

A array including array elements in a number smaller than the minimum number of pixels, having values larger than Th_c, and a plurality of array elements having values smaller than Th_c is generated. A formation array having the same size as that of a latent image is generated from the generated array. An image obtained by replacing the pixel value at a pixel position within the first region in the latent image with the value at the pixel position in the formation array is generated as a configuration image. The pixel value at each pixel position in the configuration image, that corresponds to each pixel position in the input image, is output as the amount of a highly infrared absorbent color material used to print a pixel at this pixel position in the input image.

Information processing apparatus and information processing method

For a selected pixel value, amounts of color material used of respective color materials used to print a background region, and those of respective color materials used to print a latent image region are calculated. The calculated amounts of color material used are stored in a memory in association with the selected pixel value. Amounts of color material used corresponding to respective pixel values of a pixel value group are read out from the memory, and are output to a printing apparatus.

Image processing apparatus, method, and program product for generating a color image visible under ordinary light with a latent image region easily discriminated under infrared light

When a lightness level expressed by a selected pixel value is equal to or larger than a threshold, the use amounts of respective color materials of a first color material group, and those of respective color materials of a third color material group are stored in a memory in association with the selected pixel value. On the other hand, when the lightness level expressed by the selected pixel value is smaller than the threshold, the use amounts of respective color materials of the first color material group, and those of respective color materials of a second color material group are stored in the memory in association with the selected pixel value.

Image processing apparatus and image processing method

An apparatus and method specify the presence/absence of an alteration and an alteration position of an image. A block-division unit divides image data into image data of a first unit including a predetermined number of pixels. A block calculation unit calculates an image data coefficient of the first unit. A cell-division unit divides one image data of the first unit into image data of a second unit. A cell calculation unit calculates an image data coefficient of the second unit. First verification data is generated by selecting two image data coefficients of the first unit and generating, for one pair, data representing the magnitude relation of the image data coefficients of the first unit. Second verification data is generated by selecting two image data coefficients of the second unit and generating, for one pair, data representing the magnitude relation of the image data coefficients of the second unit.

Information processing apparatus, verification apparatus, and methods of controlling the same

Line spacing values in a document image are extracted and a variance is calculated for fluctuations in the line spacing values. When the calculated variance is higher than a preset threshold value, the document image is determined as having watermark information embedded therein. Such use of the variance in the line spacing values enables high-speed determination of the presence or absence of line-spacing watermark information. At this time, it is possible to speed up the determination by using only some line spacing values in the document, instead of using all line spacing values.

Document processing apparatus and document processing method

Character spacing values in a document image are extracted and a variance is calculated for fluctuations in the character spacing values. When the calculated variance is lower than a preset threshold value, the document image is determined as having watermark information embedded therein. Such use of the variance in the character spacing values enables high-speed determination of the presence or absence of character-spacing watermark information. At this time, it is possible to speed up the determination by using only some character spacing values in the document, instead of using all character spacing values.

To accurately extract embedded information from a document image using line spacing watermark, an image processing apparatus for extracting watermark information includes an input unit which inputs a document image as image data, an image reduction unit which generates, from the image data, reduced image data reduced in the first direction, a detection unit which scans the reduced image data in the second direction and detects the length of a blank region as line spacing information, and an extraction unit which extracts watermark information embedded in the document image based on the line spacing information.

Image processing apparatus and method of controlling the same

An information embedding apparatus () which embeds information in each character in an original document includes an extraction unit () which extracts the circumscribed rectangles of characters from the original document, a selection unit () which selects, based on a predetermined condition, a character in which information is to be embedded, from the characters included in the respective circumscribed rectangles, an information embedding unit () which embeds information in a character selected by the selection unit () as the character in which information is to be embedded, a character generation unit () which generates a character not selected by the selection unit () at a lower pixel density per unit area than that of the character in which the information embedding unit () embeds the information, and an output unit () which outputs the original document processed by the information embedding unit () and the character generation unit ().

Information processing apparatus and method

To provide a technique of embedding information in a document image containing character strings, photos, and graphics, an image processing apparatus for inputting a document image and embedding watermark information by controlling the line spacing between character strings in the document image includes an input unit which inputs a document image as image data, an image reduction unit which generates reduced image data from the image data, a determination unit which determines reduced objects corresponding to character strings in the image data, a specifying unit which specifies the position of each character string in the image data based on the positions of the reduced objects in the reduced image data, and an embedding unit which embeds the watermark information in the image data by moving the positions of a plurality of specified character strings in the image data based on a preset line spacing correspondence relationship.

There is provided a technique of reflecting the state of the copy-forgery-inhibited pattern (CFIP) of a paper document on various operations when the paper document with the CFIP is converted into an electronic document. For this purpose, an image processing apparatus includes a first determination unit which determines whether a latent pattern exists in an input image, a second determination unit which determines whether a background pattern exists in the input image, and a control unit which, in the case that it is determined that the latent pattern exists and that the background pattern exists, controls to copy the input image, and in the case that it is determined that the latent pattern exists and that no background pattern exists, controls to inhibit copying of the input image.

Image processing apparatus for determining whether a scanned image includes a latent pattern and a background pattern, and an image processing method therefor

A condition determination unit () determines a to-be-used copy-forgery-inhibited-pattern image from a first copy-forgery-inhibited-pattern image generated using a latent pattern designed as a pattern that becomes visible upon copy and a background pattern designed as a pattern that becomes invisible upon copy and a second copy-forgery-inhibited-pattern image generated using the latent pattern. A tint block image generation unit () generates the determined copy-forgery-inhibited-pattern image. A combining unit () combines the generated copy-forgery-inhibited-pattern image with a print target image. A print data processing unit () generates print data on the basis of the combined data and outputs the print data to a printer ().

System and control method for generating an image having a latent pattern with or without a background pattern

A communication apparatus and method is arranged such that, when executing a communication protocol conforming to V.34 recommendation, the communication procedure is appropriately recovered even if a second tone signal (a tone A or a tone B) is not received within 2 seconds. A CPU (central processing unit) recognizes a state of execution of the communication procedure by a modem. When the second tone A signal (or tone B signal) has not been received, the CPU causes the modem to receive the tone A signal for a defined time period. When the tone A signal has been received within the defined time period, the CPU returns the communication procedure conforming to the V.34 recommendation by the modem to the first half portion of phase 2.

Growing community of inventors

Yokohama, Japan

Koji Harada