Pdf To Jpg Resolution

[Brian Scarano]

Thedisplay resolution or display modes of a digital television, computer monitor, or other display device is the number of distinct pixels in each dimension that can be displayed. It can be an ambiguous term especially as the displayed resolution is controlled by different factors in cathode ray tube (CRT) displays, flat-panel displays (including liquid-crystal displays) and projection displays using fixed picture-element (pixel) arrays.

An example of pixel shape affecting "resolution" or perceived sharpness: displaying more information in a smaller area using a higher resolution makes the image much clearer or "sharper". However, most recent screen technologies are fixed at a certain resolution; making the resolution lower on these kinds of screens will greatly decrease sharpness, as an interpolation process is used to "fix" the non-native resolution input into the display's native resolution output.

While some CRT-based displays may use digital video processing that involves image scaling using memory arrays, ultimately "display resolution" in CRT-type displays is affected by different parameters such as spot size and focus, astigmatic effects in the display corners, the color phosphor pitch shadow mask (such as Trinitron) in color displays, and the video bandwidth.

Computer displays including projectors generally do not overscan although many models (particularly CRT displays) allow it. CRT displays tend to be underscanned in stock configurations, to compensate for the increasing distortions at the corners.

Interlaced video (also known as interlaced scan) is a technique for doubling the perceived frame rate of a video display without consuming extra bandwidth. The interlaced signal contains two fields of a video frame captured consecutively. This enhances motion perception to the viewer, and reduces flicker by taking advantage of the phi phenomenon.

The European Broadcasting Union has argued against interlaced video in production and broadcasting. The main argument is that no matter how complex the deinterlacing algorithm may be, the artifacts in the interlaced signal cannot be completely eliminated because some information is lost between frames. Despite arguments against it, television standards organizations continue to support interlacing. It is still included in digital video transmission formats such as DV, DVB, and ATSC. New video compression standards like High Efficiency Video Coding are optimized for progressive scan video, but sometimes do support interlaced video.

Progressive scanning (alternatively referred to as noninterlaced scanning) is a format of displaying, storing, or transmitting moving images in which all the lines of each frame are drawn in sequence. This is in contrast to interlaced video used in traditional analog television systems where only the odd lines, then the even lines of each frame (each image called a video field) are drawn alternately, so that only half the number of actual image frames are used to produce video.

One of the drawbacks of using a classic television is that the computer display resolution is higher than the television could decode. Chroma resolution for NTSC/PAL televisions are bandwidth-limited to a maximum 1.5 MHz, or approximately 160 pixels wide, which led to blurring of the color for 320- or 640-wide signals, and made text difficult to read (see example image below). Many users upgraded to higher-quality televisions with S-Video or RGBI inputs that helped eliminate chroma blur and produce more legible displays. The earliest, lowest cost solution to the chroma problem was offered in the Atari 2600 Video Computer System and the Apple II+, both of which offered the option to disable the color and view a legacy black-and-white signal. On the Commodore 64, the GEOS mirrored the Mac OS method of using black-and-white to improve readability.

When a computer display resolution is set higher than the physical screen resolution (native resolution), some video drivers make the virtual screen scrollable over the physical screen thus realizing a two dimensional virtual desktop with its viewport. Most LCD manufacturers do make note of the panel's native resolution as working in a non-native resolution on LCDs will result in a poorer image, due to dropping of pixels to make the image fit (when using DVI) or insufficient sampling of the analog signal (when using VGA connector). Few CRT manufacturers will quote the true native resolution, because CRTs are analog in nature and can vary their display from as low as 320 200 (emulation of older computers or game consoles) to as high as the internal board will allow, or the image becomes too detailed for the vacuum tube to recreate (i.e., analog blur). Thus, CRTs provide a variability in resolution that fixed resolution LCDs cannot provide.

Imposing sanctions on individuals it said were undermining the stability of Yemen, the Security Council today demanded that all parties in the embattled country, in particular the Houthis, immediately and unconditionally end violence and refrain from further unilateral actions that threatened the political transition.

Adopting resolution 2216 (2015) by 14 affirmative votes to none against, with one abstention (Russian Federation), the Council also demanded that the Houthis, withdraw from all areas seized during the latest conflict, relinquish arms seized from military and security institutions, cease all actions falling exclusively within the authority of the legitimate Government of Yemen and fully implement previous Council resolutions.

Acting under chapter VII of Charter, the body also called upon the Houthis to refrain from any provocations or threats to neighbouring States, release the Minister for Defence, all political prisoners and individuals under house arrest or arbitrarily detained, and end the recruitment of children.

Imposing sanctions, including a general assets freeze, travel ban and arms embargo, on Abdulmalik al-Houthi, who it called the Houthi leader, and Ahmed Ali Abdullah Saleh, son of the president who stepped down in 2011, the resolution called upon all Yemeni parties to abide by the Gulf Cooperation Council and other initiatives and to resume the United Nations-brokered political transition.

Reaffirming the need for all parties to ensure the safety of civilians, the Council called on parties to facilitate the evacuation by concerned States and international organizations of their civilians and personnel from Yemen. The resolution requested the Secretary-General to report on the implementation of the resolution within 10 days.

The representative of Jordan, Council President for April, said, however, that the adoption of the resolution under Chapter VII was a clear and firm signal to the Houthis and all those supporting them to comply with their obligations. Stressing the regional ramifications of the escalating conflict, she stated that the Council was prepared to consider any additional measures required.

While also voting in favour of the text, the representative of Venezuela expressed concern at what he called the lack of inclusion and transparency in the deliberations, maintaining that the views of non-permanent members were side-lined.

MARK LYALL GRANT (United Kingdom), supporting Saudi-led military action at the request of Yemeni President Hadi, said that, ultimately, an inclusive political process would have to be reached. A political solution was also the best way to fight extremism and promote humanitarian relief. The resolution just adopted was aimed at ensuring that everyone engaged in the United Nations-negotiated process in good faith. It was right to increase political pressure against individuals who did not do so, he added. The security and stability of Yemen was in the interest of the world; the United Kingdom would use all tools in its disposal towards that end.

VITALY CHURKIN (Russian Federation) said his delegation had abstained because the resolution was not fully in line with what was required by the crisis in Yemen. The text failed to take into account proposals his country had made and to call on all sides to halt fire, did not provide for due reflection on consequences and lacked clarity on a humanitarian pause. There were also inappropriate references to sanctions, he added, stating that the resolution must not result in an escalation of the crisis. He stressed that there was no alternative to a political solution and action by the Council must be engendered from already-existing documents.

ROMN OYARZUN MARCHESI (Spain) said that the Council, through the resolution, had made its resolve clear to all parties. He underscored the need for an inclusive dialogue based on political consensus towards resolving the crisis, leading to a democratic transition led by the Yemeni people themselves. Such dialogue, he stressed, could be successful only if the armed conflict ended. While expressing strong support for the resolution, he underscored the need for the Council to ensure greater transparency and inclusiveness in its consultations.

SITI HAJJAR ADNIN (Malaysia) said that the Council had been compelled to adopt another resolution on Yemen because of the deteriorating situation. She emphasized that the political transition hinged on the political will of the parties themselves. Strongly condemning spoilers of the peace process, she said their pursuit of narrow political interests had betrayed the hopes and aspirations of the Yemeni people. The blatant attack by the Houthis on the presidential palace was unacceptable and the Council had the duty and responsibility to press all parties to return to the negotiating table. Malaysia was deeply concerned at the worsening humanitarian situation and the difficulties in providing relief assistance to the most vulnerable. All parties to the conflict must protect civilians from the violence.

CRISTIN BARROS MELET (Chile) said that, despite different interpretations of the situation in Yemen, there was firm agreement on the disastrous effects the violence had on civilians. Expressing satisfaction at the final text that emerged from consultations on the resolution, he stressed that the humanitarian situation would not improve without a ceasefire and an inclusive political settlement. He regretted the fact that the resolution did not include references to the deadly violence committed against children and to attacks on hospitals and schools, saying they were dimensions the Council could not overlook. He called on Council members to make the negotiating process more transparent, in the effort of making resolutions more effective.

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