A process executing system for receiving image data of an output material from an apparatus and processing the output material, the process executing system comprising a communicator and a duplicate detector. The communicator is configured to transmit, in response to a request from the apparatus, to the apparatus, output data of the output material including identification information of the output material, and is configured to receive image data generated by reading the output material by the apparatus, the output material being the output data printed by the apparatus. The duplicate detector is configured to detect a generation of the image data from a same output material as the output material, based on the identification information of the output material attached in the image data received by the communicator.

A process executing system for receiving image data of an output material from an apparatus and processing the output material, the process executing system comprising a communicator and a duplicate detector. The communicator is configured to transmit, in response to a request from the apparatus, to the apparatus, output data of the output material including identification information of the output material, and is configured to receive image data generated by reading the output material by the apparatus, the output material being the output data printed by the apparatus. The duplicate detector is configured to detect a generation of the image data from a same output material as the output material, based on the identification information of the output material attached in the image data received by the communicator.

A photograph is processed using signal image comparison to determine whether it is a substantial duplicate of another photo. The camera alerts the user when the photo just obtained is very similar to one that was previously taken, and then based on camera settings either offers to delete the picture from the camera's memory for the user or deletes automatically. The camera may determine whether two photos are nearly identical by a pixel by pixel comparison.

The present disclosure relates to the technical field of wireless network communications, and provides a method, system and client for uploading an image, a network server and a computer storage medium. The method includes: a client determines an image to be uploaded, generates a unique image identifier corresponding to the image to be uploaded, and transmits an image detection request to a network server; the network server detects whether there is an image having the same image identifier in the network server according to the image identifier included in the image detection request, and returns a detection result to the client; when the detection result is that there is not an image having the same image identifier in the network server, the client uploads the image to be uploaded in the form of multi-part uploading to the network server; and after the image to be uploaded is uploaded successfully, the network server records the image identifier, and returns an upload success response to the client. The present disclosure avoids a repeated uploading of a same image, so that the upload rate is improved, a great deal of network traffic bandwidth is saved, and user experiences are improved.

The printing apparatus can perform differential printing to print differences between a print-target image data set and a reference-source image data set, and includes a differential print request accepting unit, a differential extraction unit, a differential thumbnail image creating unit, and an output control unit. If the differential print request accepting unit accepts a differential print request, the differential extraction unit compares the print-target image data set with the reference-source image data set and extracts a difference between them. The differential thumbnail image creating unit places a mark on an area containing the difference, which is extracted by the differential extraction unit, in a page of the print-target image data set, and creates a differential thumbnail image which is a thumbnail image of the page containing the difference. The output control unit performs control operations to output the differential thumbnail image created by the differential thumbnail image creating unit.

The printing apparatus can perform differential printing to print differences between a print-target image data set and a reference-source image data set, and includes a differential print request accepting unit, a differential extraction unit, a differential thumbnail image creating unit, and an output control unit. If the differential print request accepting unit accepts a differential print request, the differential extraction unit compares the print-target image data set with the reference-source image data set and extracts a difference between them. The differential thumbnail image creating unit places a mark on an area containing the difference, which is extracted by the differential extraction unit, in a page of the print-target image data set, and creates a differential thumbnail image which is a thumbnail image of the page containing the difference. The output control unit performs control operations to output the differential thumbnail image created by the differential thumbnail image creating unit.